Author Topic: Motorcycle exhaust noise considerations.  (Read 27358 times)

0 Members and 1 Guest are viewing this topic.

Offline lucky

  • Really Old Timer ...
  • *******
  • Posts: 6,717
Re: Motorcycle exhaust noise considerations.
« Reply #50 on: July 21, 2012, 06:13:40 AM »
Yeah I am not seeing the advertisements for "Smooth and quiet". 

CycleX has a muffler I was looking at and they claim "best sounding" which means absolutely nothing. 

I am hearing claims that at lower RPM it is ok as far as noise but once it gets up there its incredibly loud.

Why don't you just buy the 60 lb. stock exhaust system that came with the motorcycle?


BTW....all engines get louder as the rpm increases.

Offline lucky

  • Really Old Timer ...
  • *******
  • Posts: 6,717
Re: Motorcycle exhaust noise considerations.
« Reply #51 on: July 21, 2012, 06:19:47 AM »
I have high frequency hearing loss. I like the sound of a good engine but it doesn't necessarily have to be loud. It can be loud and sound good without the rider being an #$%* about it by showing off to everyone else. I use ear plugs. I have a few extra pairs if anyone needs some. Also I sometimes wear a helmet on my Harley and I use synthetic oil. Dangerous combinations  ;)
I have a flat spot in my hearing also. the Doc said it could be from gunshots, loud music, or loud motors. i said yes to all of the above. he son I am amazed you have this much hearing left.

I also use eaplugs when riding for wind noise. I keep a bunch of them in my pack. I use them at work and sometimes forget to take unused packs out of my pockets.

Loud exhausts are very annoying for the public and while riding..


Just wear a full coverage helmet and the wind noise will be gone.

Offline samIam

  • Full Member
  • *
  • Posts: 86
  • 72 Honda CB500 Four
Re: Motorcycle exhaust noise considerations.
« Reply #52 on: July 21, 2012, 06:58:19 AM »
I'm a fan of loud exhaust.  My bike came with loud 4-2 exhaust and it pretty damn loud at high RPM.  I will say that I'm lucky enough to have a neighbor with a loud a$$ german sheperd barking all the time to take the attention off my bike.  One of my cars has 2.5" true duals with turbo mufflers, also.  I am considerate at 7am so I take my little car when I work that shift.  Otherwise, since its a big city and there are two harleys on the block, I dont feel bad about the exhaust.  Whoever thinks loud pipes dont save lives is living in lala land. 

Offline MCRider

  • Such is the life of a
  • Really Old Timer ...
  • *******
  • Posts: 14,376
  • Today's Lesson: One good turn deserves another.
Re: Motorcycle exhaust noise considerations.
« Reply #53 on: July 21, 2012, 09:18:09 AM »
"Whoever thinks loud pipes dont save lives is living in lala land.  "

This unprovable argument like so many similar seems to put the end to it, but in reality solves nothing.

Let's assume for argument, that loud pipes do save lives. Given. I'll concede.

IT still doesn't give anyone the right to infringe on another's rights, especially when the effect is potential bodily harm.

If your sport requires that you make unacceptable noise, as defined by statute, then you have to question whether that sport should be allowed.

If you personally need to make unacceptable amounts of noise to ply your sport safely, then the question is the legitimacy of your sport or your ability to perform it properly.

My bikes are whisper quiet especially my FJR. I never feel threatened, nor do i threaten anyone else.
Ride Safe:
Ron
1988 NT650 HawkGT;  1978 CB400 Hawk;  1975 CB750F -Free Bird; 1968 CB77 Super Hawk -Ticker;  Phaedrus 1972 CB750K2- Build Thread
"Sometimes the light's all shining on me, other times I can barely see, lately it appears to me, what a long, strange trip its been."

Offline BobbyR

  • Really Old Timer ...
  • *******
  • Posts: 12,367
  • Proud Owner of the Babe Thread & Dirty Old Man
Re: Motorcycle exhaust noise considerations.
« Reply #54 on: July 21, 2012, 10:06:36 AM »
I have high frequency hearing loss. I like the sound of a good engine but it doesn't necessarily have to be loud. It can be loud and sound good without the rider being an #$%* about it by showing off to everyone else. I use ear plugs. I have a few extra pairs if anyone needs some. Also I sometimes wear a helmet on my Harley and I use synthetic oil. Dangerous combinations  ;)
I have a flat spot in my hearing also. the Doc said it could be from gunshots, loud music, or loud motors. i said yes to all of the above. he son I am amazed you have this much hearing left.

I also use eaplugs when riding for wind noise. I keep a bunch of them in my pack. I use them at work and sometimes forget to take unused packs out of my pockets.

Loud exhausts are very annoying for the public and while riding..


Just wear a full coverage helmet and the wind noise will be gone.
Not true, I have worn full helmets for 10 years. They still have a lot of wind noise. I see a lot of riders take off very exotic expensive helmets and they pull out their earplugs.
Dedicated to Sgt. Howard Bruckner 1950 - 1969. KIA LONG KHANH.

But we were boys, and boys will be boys, and so they will. To us, everything was dangerous, but what of that? Had we not been made to live forever?

Offline TwoTired

  • Really Old Timer ...
  • *******
  • Posts: 21,805
Re: Motorcycle exhaust noise considerations.
« Reply #55 on: July 21, 2012, 11:03:50 AM »
TT, no I wouldn't say that. All I'm saying is in certain places I'm not concerend if there's any noise from my bike or anyone else's for that matter and my 77 is not loud by any means. It idles at the proper rpm and I'm not a retard reving it at any chance I get, on the highway at 1/2 or 3/4 throttle it hums not barks and I think that's fine. It's a motorcycle after all. The world is full of noise, I think we should be used to it by now. A bit of car or moto noise is nothing compared to the planes, trains, highways, etc. I have better things to loose sleep over.

A Kerker with a baffle is not what I'd personally call a problem these days (unless you are revving to 8k down a residential street).  I actually have one of these on a 750, waiting in the restoration queue.  One day I'll compare it to the Stock Cb750F muffler.  However, until it's tested, I assume it would fail using either the FED testing or the AMA recommended testing methods.

My comment was more about the attitude presented in your post, where you professed no regard for others in certain venues.  I think the risk there is that once such a decision is made, it is fairly easy to expand the venues of allowance to fit the current mood.


However, you brought up "the world is full of noise" topic.  I'll point out that this was not always true.

Are you familiar with trend data projections?  This is where you chart prior historical samples on a graph, and use that data to project where it might be in the future.  If you were to sample the ambient noise level in say 1900, 1950, and 2000, it would begin to show trend data, and I suspect a ramp or slope trending upward. (I haven't gathered actual data.)  So, at some point in the future (given no organized restrictive efforts) it can be projected to be completely intolerable for human habitation.

What will prevent this from happening?  The creation and enforcement of noise laws, which can become "reasonable" or "draconian" depended on the law creation body in power at the time.  When enough people demonstrate a lack of self control which is identified as a threat to society, society historically reacts.

My point is that, although you may currently be desensitized to accept a higher noise level than those 100 years ago, the population density has increased,  including the portion of those people who wish to impress their power over others.  When this occurs, "needs" become the guiding influence over lawmaking, rather than "wants", which may extend to, "Why does anyone need a motorcycle at all, let alone one that is louder than accepted standards, or other personal transportation machines.

Cheers,
Lloyd... (SOHC4 #11 Original Mail List)
72 500, 74 550, 75 550K, 75 550F, 76 550F, 77 550F X2, 78 550K, 77 750F X2, 78 750F, 79CX500, 85 700SC, GL1100

Those that learn from history are doomed to repeat it by those that don't learn from history.

Offline crazypj

  • I'm brill, me
  • Old Timer
  • ******
  • Posts: 4,467
  • first 100,000 miles. 1977 CB550F
Re: Motorcycle exhaust noise considerations.
« Reply #56 on: July 21, 2012, 11:49:16 AM »
Just adding my opinion and experiences
The only speeding ticket I got 'done' for was around 2:00am because police heard me coming.
Bike wasn't really all that loud but in still air at night it always sounds louder
 Since then, I've always had quietest practical exhaust systems on bikes.
Friend has a CB360 with what used to be a stupidly loud exhaust (you could hear it from at least half a mile away during the day when there was a lot of background noise)
I fitted a restrictor to end of pipe and a 14" extension (unbaffled)
It's now a LOT faster  and a LOT quieter (he's turned up at the house and had to ring doorbell  ;D)
There is a guy living about 1/4 mile away with a V-8,(haven't bothered to find out who exactly)
It's really annoying when fired up, loud just for the sake of it  ::)
I fake being smart pretty good
'you can take my word for it or argue until you find out I'm right'

Offline MCRider

  • Such is the life of a
  • Really Old Timer ...
  • *******
  • Posts: 14,376
  • Today's Lesson: One good turn deserves another.
Re: Motorcycle exhaust noise considerations.
« Reply #57 on: July 21, 2012, 12:03:49 PM »
"Not true, I have worn full helmets for 10 years. They still have a lot of wind noise. I see a lot of riders take off very exotic expensive helmets and they pull out their earplugs."

Agree: Full face helmets solve nothing re wind noise. Some may be worse. Case by Case.  Earplugs still required. IMO
Ride Safe:
Ron
1988 NT650 HawkGT;  1978 CB400 Hawk;  1975 CB750F -Free Bird; 1968 CB77 Super Hawk -Ticker;  Phaedrus 1972 CB750K2- Build Thread
"Sometimes the light's all shining on me, other times I can barely see, lately it appears to me, what a long, strange trip its been."

Offline TwoTired

  • Really Old Timer ...
  • *******
  • Posts: 21,805
Re: Motorcycle exhaust noise considerations.
« Reply #58 on: July 21, 2012, 12:06:24 PM »
Whoever thinks loud pipes dont save lives is living in lala land.

Are you saying you are far too lazy to push the horn button when needed, and "need" a constant noise to announce your impending arrival and departure?

I'll note that there are lot of two year olds who relish beating pots and pans together for the attention they garner.  Just how is "Loud pipes" any different?

But, rather than just reject the "Loud pipes saves lives" popular slogan as being downright silly and immature, can we find ANY supportive data for it's justification?

What about accident data?  Shouldn't bikes with loud pipes be involved in less accidents, statistically?  Oh, contraire mon ami!
From: "The Hurt Report"
36. Motorcycle modifications such as those associated with the semi-chopper or cafe racer are definitely overrepresented in accidents.

Do any of these retain the stock, quiet pipes?

For another pretty good counter argument, see:
http://www.lowertheboom.org/links/v02_loud_pipes.html

Hehe, I also found this:
"Loud Pipes Save Lives is a fantasy created in an attempt to justify breaking the law and to inflate mini egos." 
^^^^ I can't take credit for this quote.  But, I think it is pretty much on the mark.

And finally this:
After its initial studies, the EPA concluded that a major part of the noise problem
with motorcycles was attributable to:  (1) motorcycles with aftermarket exhaust
systems that had poor or little muffling characteristics, and (2) owner modifications
to, or tampering with, original equipment exhaust systems.  The EPA noted that
either of these modifications could easily increase noise emissions to over 100
dBA.  The EPA also realized that if left unregulated, ongoing efforts to reduce
noise from other transportation sources would make motorcycles the single most
prominent environmental noise source.

If I'm in lala land, it is apparently more real than dreamland or egoland.
Lloyd... (SOHC4 #11 Original Mail List)
72 500, 74 550, 75 550K, 75 550F, 76 550F, 77 550F X2, 78 550K, 77 750F X2, 78 750F, 79CX500, 85 700SC, GL1100

Those that learn from history are doomed to repeat it by those that don't learn from history.

Offline luap

  • LAWL
  • Expert
  • ****
  • Posts: 779
Re: Motorcycle exhaust noise considerations.
« Reply #59 on: July 21, 2012, 12:14:00 PM »
portion of those people who wish to impress their power over others
CORRECTION-EVERYONE impress their power over others you do it everytime you get in your car, texting, eating, speeding, changing the radio station,driving to slow drinking an driving, I would guess most are guilty of one of the listed things an has caused you to get in a accident almost hit that bicyclist that motorcycle- I personally have NOT seen any news tv show commercials, showing someone sitting in a wheelchair, at a funeral, in a hopspital for having loud pipes which you do for everything lese listed
TT provided alot of good info now who is  going to start the "trend" an put some numbers up from the loud bikes in their neighborhood
have any of you guys gone down introduced yourself neighbor with the loud pipes an just asked, hey man would you mind limping your bike out of the neighborhood


75-550 ffsc sold, 78-550 diamonte sold, 125s grasshopper sold, 76-550 puma sold, 78-550 tracker sold, 74-550 verde diablo Sold, 74-550 Noemani finished trying to sell. 72 500 hartail in the works
www.cb-town.com
"I dont need a bike covered in paint an chrome I know exactally bout how big my coc( is"

Offline rboe

  • Enthusiast
  • **
  • Posts: 125
Re: Motorcycle exhaust noise considerations.
« Reply #60 on: July 21, 2012, 12:18:04 PM »
When I bought my Moto Guzzi Quota it had a Super Trapp muffler on it. Had it dyno'd for some reason and the HP was fairly low. Ran into an engineer type that said it was his opinion that the Super Trapp did not have enough volume to handle the 1100cc's so I found a stock muffler and put it on and re-dyno'd it. I gained 12 HP by going back to stock.

It was also quieter and gained a very nice deep rumble it did not have before. My new Griso has this same rumble.

Now my 350F with stock pipes is louder than I expected so I have some concerns there once I start to ride her more.
1974 CB350F
2008 XR650L
2012 Griso SE

Past iron
1971 Suzuki TS125
1977 Honda CJ360T
1981 Kawasaki 550Ltd
2000 Moto Guzzi Quota

Offline samIam

  • Full Member
  • *
  • Posts: 86
  • 72 Honda CB500 Four
Re: Motorcycle exhaust noise considerations.
« Reply #61 on: July 21, 2012, 12:39:43 PM »
Simple question...can you honestly say that lives have not been saved because the motorist heard the exhaust of the bike?  I think we all know that plenty of lives have been spared because of the exhaust.  I didn't read the links but, if they say different, maybe they should look a little harder.  I think there are plenty of people that will tell you how the noise from exhaust has saved them.

Offline lordmoonpie

  • Master
  • *****
  • Posts: 2,053
  • Feal the Fear and do it anyway...
    • Moonpie
Re: Motorcycle exhaust noise considerations.
« Reply #62 on: July 21, 2012, 12:40:22 PM »
All very interesting stuff and it sounds (no pun intended) that the USA is more strangled in its noise regulations than the UK. However, for my part I like motorcycle exhaust noise because I like classic bikes and classic racing bikes most of all. I guess that puts me in a minority here, maybe as someone earlier said, people think I'm "a dick" but that's what I like, it's my choice to like it, no-one elses.

Sure you can claim that bikes are noisy and disruptive, just like much of our mechanised world has become noisy and disruptive compared to the cool green hills and the peace and quiet of 200 years ago, it's called progress, whether you subscribe to it actually being progress or not. Noise is just one factor in our polluted world that invades the privacy of others. I hate the loud stereos of the teenagers in their little deathtrap cars but I hate light pollution more. Security lights street lights, houses wrapped in christmas lights - so bad that most countries have to move their space telescopes to the outside of nowhere to escape the light pollution becasue it's no so bad they can't see through the sodium glare to pick up the dots of light from space. On sunny days, I can't escape the appalling song choices of my neighbours, blasting out their favourite bands in the back garden, most of which I hate, but have to accept because there's nothing I can do about it. We're all surrounded by intrusions of some kind.

Face it, we are all of us having our privacy invaded by someone, somewhere, sometime and noise, motorcycle exhaust noise to be specific is a tiny tiny factor in the big picture.

Personally, I will not stop loving the sound of a special motorcycle on cam, with race pipes, being ridden hard. I am eternally grateful that I have experienced several years of the Britten V1000 racing in the isle of man, a twin boom so deep you could hear it several miles and minutes away before it shot past with the doppeler effect changing its characteristics in a flash. I've heard the hailwood honda six in the island too on full pipe and it was haunting and unique. Now I'm looking forward to going to the MGP this year to see the Paton 500s howling off the mountain, a sound so industrial it almost hurts but it is beautiful too. I am thankful for the old school sound of my own CR750, 4 into 4 open megas makes beautiful music to me; the waspish crackle of the van veen kreidler I once owned, shrill, sharp and insectlike; the deep boom of my homologated road legal Ducati 888 SP5 with it's 105dB corse cans and recently, the sheer unadulterated cacophony of the Ducati D16RR desmosedici I briefly owned, an unholy sound like nothing you ever heard from a bike close up and well over 110dB.

All of those pale into insignificance though compared to the prelude of a Supermarine Spitfire flying low overhead and out to sea as an entree to the best sound I ever did hear, an Avro Lancaster Bomber, banking hard at the top of the Derwent Valley to begin a low level simulated bomb run on the derwent reservoir in the Peak District in England. On a hot summers day, in the peace of a beautiful National Park. The Lancaster made everyone stop, watch, listen, every man woman and child within the miles of earshot stood to attention and bathed in the glorious sight and sound of that machine, every hair on your neck stood proud too and I thank God that I have been able to experience these wonderful, terrible, awesome sounds in my lifetime.

I like loud bikes, I like the multitude of different sounds they make, they are a pleasure in my life that I don't want to give up, ever. If you think that makes me antisocial, a "dick", un-neighbourly then that's your opinion and you're entitled to it, but your opinion is yours, it isn't mine, it means nothing to the multi-coloured aural tapestry of my world and it never will.  ;)
1994 Ducati 888 SP5
1951 Ducati 50cc Cucciolo
1981 Yamaha XV750 SE

Offline TwoTired

  • Really Old Timer ...
  • *******
  • Posts: 21,805
Re: Motorcycle exhaust noise considerations.
« Reply #63 on: July 21, 2012, 12:45:46 PM »
portion of those people who wish to impress their power over others
CORRECTION-EVERYONE impress their power over others you do it everytime you get in your car, texting, eating, speeding, changing the radio station,driving to slow drinking an driving, I would guess most are guilty of one of the listed things an has caused you to get in a accident almost hit that bicyclist that motorcycle- I personally have NOT seen any news tv show commercials, showing someone sitting in a wheelchair, at a funeral, in a hopspital for having loud pipes which you do for everything lese listed
You misinterpreted my meaning, so let me expound.

My point is that, although you may currently be desensitized to accept a higher noise level than those 100 years ago, the population density has increased,  including the portion of those people who wish to impress their power over others. 
I was referring the legislative bodies or organized lobby groups, rather than individuals regarding the impression of power, as in political power.

Cheers,
Lloyd... (SOHC4 #11 Original Mail List)
72 500, 74 550, 75 550K, 75 550F, 76 550F, 77 550F X2, 78 550K, 77 750F X2, 78 750F, 79CX500, 85 700SC, GL1100

Those that learn from history are doomed to repeat it by those that don't learn from history.

Offline luap

  • LAWL
  • Expert
  • ****
  • Posts: 779
Re: Motorcycle exhaust noise considerations.
« Reply #64 on: July 21, 2012, 01:40:04 PM »
complaining about motorcycle exshaust which you hear for Ahh 2 minutes
But im sure everyone likes to go to a good movie 2hrs average- pulled that from a google search
For this column, Robert Sweetow, audiology director at the
University of California at San Francisco, sampled sound levels
at San Francisco Bay Area theaters with a sound meter. While
decibel readings can vary widely based on theater acoustics,
audio equipment and volume settings, here's what he found:
"Batman & Robin" peaked at 112 decibels in one theater, while
"Contact" measured 107 decibels at another -- volumes equal to
those produced by a pneumatic hammer.
 

http://www.gcaudio.com/resources/howtos/loudness.html
Lot of things to take off the list, dont mow that grass, dont use that drill- you might be pissing off your neighbors

75-550 ffsc sold, 78-550 diamonte sold, 125s grasshopper sold, 76-550 puma sold, 78-550 tracker sold, 74-550 verde diablo Sold, 74-550 Noemani finished trying to sell. 72 500 hartail in the works
www.cb-town.com
"I dont need a bike covered in paint an chrome I know exactally bout how big my coc( is"

Offline Tintop

  • Old Timer
  • ******
  • Posts: 3,965
Re: Motorcycle exhaust noise considerations.
« Reply #65 on: July 21, 2012, 01:57:39 PM »
Thanks for starting a great thread TT, and posting some real facts.  My .02 ;D-

Modern vented full face helmets are not quiet.  With all the vents open, the wind noise in my Aria RX-Q is bad enough that I'm thinking of using ear plugs.  I also wouldn't think of not using plugs with my race Bell Vortex.  The exhaust outlet is less than 30" from my ear, and over 104db.

As for loud pipes saving lives...bull s*it.  Think the old guy with the hearing aid, or the car the the bass so high the windows are shaking, or the 30 something blonde's talking on the cell phone can hear you..NO!  The only thing that will save you from cagers, is you.  By being aware ALL the time what happening around you.

My Interceptor has stock pipes, and depending on the rpm goes from unnoticed to civilized, but noticeable.  The 550's 4 open megas can make a howl worthy of comparison to Hailwood.  But I choose where & when, and it's not in town, and certainly not to impress anyone.  I would agree with lordmoonpie, that there are some glorious exhaust notes.  The Honda six on the back straight @ Mosport, any Merlin at full chat, or Italian V12.  But none of them just outside my front door thanks.
1977 CB550/4 Cafe - Speed Warrior / BOTM 03/11
1980 CB750F (project)
Whittaker GBF Vintage Racing Sidecar (XS750 power) - ITG / 151's / CMR Racing Products (SOLD)
1976 CB400 SS - stock / BOTM 04/11 (SOLD)
1973 CB750 K - basket case (SOLD)
77 CB550 Cafe build
550/750 Filter Thread
Sidecar Rebuild Thread

Offline Duke McDukiedook

  • Space Force 6 Star General
  • Really Old Timer ...
  • *******
  • Posts: 12,690
  • Wish? Did somebody say wish?
Re: Motorcycle exhaust noise considerations.
« Reply #66 on: July 21, 2012, 02:23:38 PM »
complaining about motorcycle exshaust which you hear for Ahh 2 minutes
But im sure everyone likes to go to a good movie 2hrs average- pulled that from a google search
For this column, Robert Sweetow, audiology director at the
University of California at San Francisco, sampled sound levels
at San Francisco Bay Area theaters with a sound meter. While
decibel readings can vary widely based on theater acoustics,
audio equipment and volume settings, here's what he found:
"Batman & Robin" peaked at 112 decibels in one theater, while
"Contact" measured 107 decibels at another -- volumes equal to
those produced by a pneumatic hammer.
 

http://www.gcaudio.com/resources/howtos/loudness.html
Lot of things to take off the list, dont mow that grass, dont use that drill- you might be pissing off your neighbors

Just saw the latest baman movie and it was too damned loud and I like to crank my home stereo to 11 every now and then but that damned movie was stupidly loud to where it detracted from my movie experience.

But thank you for your straw man argument, try again.

"Well, Mr. Carpetbagger. We got somethin' in this territory called the Missouri boat ride."   Josey Wales

"It's Baltimore, gentlemen. The gods will not save you." Ervin Burrell

CB750 K3 crat | (2) 1986 VFR750F

Offline lucky

  • Really Old Timer ...
  • *******
  • Posts: 6,717
Re: Motorcycle exhaust noise considerations.
« Reply #67 on: July 21, 2012, 03:28:04 PM »
complaining about motorcycle exshaust which you hear for Ahh 2 minutes
But im sure everyone likes to go to a good movie 2hrs average- pulled that from a google search
For this column, Robert Sweetow, audiology director at the
University of California at San Francisco, sampled sound levels
at San Francisco Bay Area theaters with a sound meter. While
decibel readings can vary widely based on theater acoustics,
audio equipment and volume settings, here's what he found:
"Batman & Robin" peaked at 112 decibels in one theater, while
"Contact" measured 107 decibels at another -- volumes equal to
those produced by a pneumatic hammer.
 

http://www.gcaudio.com/resources/howtos/loudness.html
Lot of things to take off the list, dont mow that grass, dont use that drill- you might be pissing off your neighbors

Just saw the latest baman movie and it was too damned loud and I like to crank my home stereo to 11 every now and then but that damned movie was stupidly loud to where it detracted from my movie experience.

But thank you for your straw man argument, try again.

There may have been others that thought it was too loud. I hope you call and tell the management. Very important to not just be sheep.

Offline Vincent

  • Enthusiast
  • **
  • Posts: 104
Re: Motorcycle exhaust noise considerations.
« Reply #68 on: July 21, 2012, 04:16:15 PM »

Can we stipulate that a distinction between good and bad noise can be made based on context and choice? If I go to a rock concert, I'm traveling to a venue and paying money to be in what I know will be an extremely noisy environment. That's why I'm there, and that's why the rest of the audience is there too. Next weekend I'm going up to Laguna Seca to see the MotoGP race. I'll drive about six hours each way and spend a bunch of money so that I can be surrounded by high-revving, un-silenced motorcycles. Soaking up the sounds and fumes of a pack of thundering, shrieking, roaring motorcycles will be like being in motorhead heaven. By Sunday evening I'll probably feel like someone hit me in the head with a shovel, but I'll be pretty damn happy. Because that was my choice. But how about the people who don't make that choice? Because I liked the concert, should I put my speakers in the window and play the band's CD at concert volume to make my neighbors hear it too? And I imagine that a lot of the people who don't go up to Laguna are people who have decided that they're not interested in hearing a bunch of loud bikes. So do we just tell them "Tough crap, I don't care if you're reading a book, watching your baby take a nap, having sex, eating dinner, or sleeping after getting home from work, I like my 100 db pipe, and I'm going to force you to listen to it"? Am I the only person I should consider when I decide how I should move through the world? In order to enjoy the things that we enjoy, do we have to force those things on people who may not enjoy them? What if I enjoy frightening small children? Screaming at old ladies? Loud pipes OK, frightening babies not OK? What if my loud pipes frighten babies?

Offline Bob3050

  • Hot Shot
  • ***
  • Posts: 390
Re: Motorcycle exhaust noise considerations.
« Reply #69 on: July 21, 2012, 04:56:01 PM »
I went to a Honda motorcycle dealer convention in Las Vegas a few years back and as we filed into the theater they gave us ear plugs at the door. After we were seated they rolled a Honda RC166 250 6 cylinder GP bike on stage and recommended that we use the ear plugs and then they fired the bike up. It was extremely loud but a more beautiful sounding machine I have never heard. On the other hand I doubt I would feel the same if I heard it at 2:00am going past my house.
Click on the "ring tone" in this link to see what I mean.
Bob
http://www.bikeexif.com/honda-rc166
 

Offline 750K

  • Expert
  • ****
  • Posts: 1,392
Re: Motorcycle exhaust noise considerations.
« Reply #70 on: July 21, 2012, 04:57:06 PM »
TT, I'm sure this topic could go on forever, like an oil or pod or tire thread. It always comes down to one thing, people either like one or the other. Thank god I'm free to decide for myself and you know if I decide one day to run a loud pipe and I most likely will have one in the next few years. I'll be ok with the chance of getting pulled over and taking that loud pipe fine from a cop. You play you pay, most likely by then I'll be living in the country and I can make as much or as little noise as I want on my own property or surrounding area. 

I'm sure I'll still have the same outlook as I do now, in situations where noise won't matter I won't think twice. In places where it will be an issue I'll be as considerate as possible. But in the end life is short and I'm going to enjoy myself, if that means being on a loud bike or car well I'm fine with that. I get that other people don't like loud things, I respect that. Hell I hate the sound of the bongo playing hippie douche bags one house over across from my backyard. But whatever, they're just enjoying themselves. Its not so much the noise as it is that it's bongos. I just hate bongos and hippies, I'll take straight pipes over that anyday.
« Last Edit: July 21, 2012, 05:01:46 PM by 750K »
77 Cb750, 78 Kz1000

Offline TwoTired

  • Really Old Timer ...
  • *******
  • Posts: 21,805
Re: Motorcycle exhaust noise considerations.
« Reply #71 on: July 21, 2012, 05:26:18 PM »
complaining about motorcycle exshaust which you hear for Ahh 2 minutes
That's two minutes where you have to stop your private conversation because some "it's all about me" drive by with illegal equipment.
This seems fair and sociable to you?

But im sure everyone likes to go to a good movie 2hrs average- pulled that from a google search
For this column, Robert Sweetow, audiology director at the
University of California at San Francisco, sampled sound levels
at San Francisco Bay Area theaters with a sound meter. While
decibel readings can vary widely based on theater acoustics,
audio equipment and volume settings, here's what he found:
"Batman & Robin" peaked at 112 decibels in one theater, while
"Contact" measured 107 decibels at another -- volumes equal to
those produced by a pneumatic hammer.
You don't see the fundamental difference between volunteering to endure high noise volumes, and having it forced upon you by an inconsiderate stranger?   I haven't been to a movie theater in 10 years, and I certainly recall several that were clearly too loud.  I stopped paying to have my ears damaged, (and shoe soles stuck to the floor, cell phone conversations, and other stupid shenanigans that occur in theater houses).
Anyway, theater houses are privately owned, similar to homes.  If in the privacy of your own home, you want to fill you ear canal with mash potatoes and then hit it with a hammer, that's your personal choice to make.  Personally, I don't care for potato-potato to be forced into my ear canal.  And, there are laws that say you don't have the freedom to do that without punishment.
 
Lot of things to take off the list, dont mow that grass, dont use that drill- you might be pissing off your neighbors
It is common to have local ordinances that disallow yard maintenance and power tool operations during normal sleeping hours.  Here, it is between 10 PM and 8AM.  Yes, you can be cited (even arrested) for such an infraction if you persist in flagrant violation.

I wonder if you'd be willing to accept that you can not operate your open pipes between those hours...ever?  You gonna walk home if you stay out late?
Or, slap everyone in the face as you wail past them at 1 AM?
Lloyd... (SOHC4 #11 Original Mail List)
72 500, 74 550, 75 550K, 75 550F, 76 550F, 77 550F X2, 78 550K, 77 750F X2, 78 750F, 79CX500, 85 700SC, GL1100

Those that learn from history are doomed to repeat it by those that don't learn from history.

Offline TwoTired

  • Really Old Timer ...
  • *******
  • Posts: 21,805
Re: Motorcycle exhaust noise considerations.
« Reply #72 on: July 21, 2012, 05:46:52 PM »
It appears that the loud pipe sound the stimulates the adrenalin junkies "needs", are the very same triggers that make people pissed off about it.

---------------------

Safety and Health Concerns


Noise pollution is unwanted human-created sound that has the effect of being annoying, distracting, painful, or physically harmful. People exposed to noise pollution suffer from hearing loss, sleep deprivation, chronic fatigue, anxiety, hostility, depression and hypertension. World Health Organization, National Institutes of Health, United Nations and numerous scientific and medical publications recognize noise pollution and its deleterious effects.

The intense sound caused by loud motorcycles easily triggers an involuntary stress response commonly known as "fight or flight." This results in the secretion of adrenaline, with ensuing spikes in cardio-respiratory rates, muscle tension, and elevated blood pressure.

Vibroacoustic Disease is a cumulative and chronic disease caused by exposure to infrasound. Infrasound is low frequency sound energy that affects the nervous system and prolonged exposure can lead to progressive medical conditions.


Motorcycle riders with loud aftermarket exhaust systems often claim that "loud pipes save lives" - that they are more likely to notice the attention of distracted motorists when they are on the road. There is no study on record that demonstrates a correlation between the noise level of a motorcycle exhaust system and its ability to reduce accidents. Motorcycles are also equipped with horns, just like passenger vehicles.

Loud motorcycle exhaust systems produces low frequency sound that is non-directional and coming from the rear of the motorcycle where the exhaust is located. Since most two-vehicle accidents come from the front of the vehicle, the use of a loud exhaust system does nothing to alert other motorists of an oncoming motorcycle.

The National Highway Traffic Safety Administration (NHTSA) analyzes and reports on motorcycle accident data statistics and acts as a clearinghouse on motorcycle safety.

In their 2007 published report, 'Fatal Two-Vehicle Motorcycle Crashes' (DOT HS 810 834), motorcyclists were found to be overwhelmingly responsible for causing accidents with passenger vehicles. In nearly three-fourths of the two-vehicle motorcycle crashes involving passenger vehicles, the role of the motorcycle was recorded as the striking vehicle. Additionally, factors including alcohol impairment, invalid license, and speeding were more attributed to motorcycle riders.

---------------------
I found ^this^ here:
http://www.noiseoff.org/about.php

I had never heard of Vibroacoustic Disease.  But, sure enough, google gave several pointers. A good summary is:
http://www.lowertheboom.org/trice/vad.htm
Lloyd... (SOHC4 #11 Original Mail List)
72 500, 74 550, 75 550K, 75 550F, 76 550F, 77 550F X2, 78 550K, 77 750F X2, 78 750F, 79CX500, 85 700SC, GL1100

Those that learn from history are doomed to repeat it by those that don't learn from history.

72500john

  • Guest
Re: Motorcycle exhaust noise considerations.
« Reply #73 on: July 21, 2012, 06:00:45 PM »
loud pipes do have their place. the drag strip and monster truck rallies for example. but i agree with twotired. i do not want to hear your bike blasting past my house at 1 am when myself and my family is trying to sleep. i work around airplanes all day which are loud and annoying..i don"t want to hear it at home. it all boils down to the fact that commen sense and common courtesy is not that common anymore..and that's a shame. guess i am a crusty grumpy old fart, but that's my opinion for what its worth.

Offline scottly

  • Global Moderator
  • Really Old Timer ...
  • *****
  • Posts: 16,329
  • Humboldt, AZ
Re: Motorcycle exhaust noise considerations.
« Reply #74 on: July 21, 2012, 07:36:05 PM »
Anybody ever spent a night in Kingman, AZ? A major rail line runs right through town, and every time a train comes through, they blast the air horns at every crossing, day or night.
When I lived in Sunnyvale, CA, they sprayed malathion-laced molasses from low level helicopters, flying 4 side-by-side, in the middle of the night while fighting the Mediterranean fruit flys. The walls of the house shook.
A friend of mine was working on a project producing retro-fit jet engine silencing nacelles in the '80s, when the noise from busy airports became intolerable.
My point is that I'm not so sure that noise levels have increased that much in the last 30 years, in fact, they may be lower on average, with things like rubberized asphalt.
Getting back on topic, I once slipped the glass-pack silencer out of my megaphone, and took a short ride into down-town San Luis Obispo; as soon as I heard the sound bouncing back at me off cars and buildings, I sheepishly rode back home and reinstalled the silencer, ashamed of myself. My bike is loud when I rev it, but when cruising on the highway, I can barely hear the exhaust.
Don't fix it if it ain't broke!
Helmets save brains. Always wear one and ride like everyone is trying to kill you....