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+--- Thread: Engine Sound (/showthread.php?tid=1184)
RE: Engine Sound - JustPassinThru_imp - 03-20-2015
(03-18-2015, 04:21 AM)gossman_imp Wrote: I have had louder and throater sounding bikes, I love the sound of this with the stock system. It's gentlemanly, civilized, and doesn't shout "look at me". It's everything a motorcycle should sound like on the street. Plus I don't believe in the adage "loud pipes save lives" since it doesn't take into account the Doppler Effect.
When I was a kid, I loved the sound of a jalopy that had lost a muffler - and growing up in the well-salted Rust Belt, I've heard a lot of them.
As I've grown older, I have come to appreciate quiet. I don't need to listen to engine noise; as noted in discussions on the topic, NOISE is POWER WASTED.
There is no recovery or minimizing that except by basic design; but just the same, I don't want to hear it.
I've never owned a four-cylinder bike before. I like the smooth purr...wish it wasn't as buzzy over 4000 rpm; but the sound in normal operation and idle is just what I want.
This is like owning an Audi, and comparing it to a long-ago Mustang Mach I. The Mustang might have made a racket, screamed "LOOKIT MEEE!!" The Audi just quietly performs....far more competently.
RE: Engine Sound - Chapomis_imp - 03-21-2015
Well said !
RE: Engine Sound - Pterodactyl_imp - 03-21-2015
Quote:Noise is power wasted
I would have thought that noise suppression would be more likely to be power wasted. I say this without prejudice to anyone's choice for their CB.
Cheers
RE: Engine Sound - JustPassinThru_imp - 03-21-2015
(03-21-2015, 10:00 AM)Pterodactyl_imp Wrote: Quote:Noise is power wasted
I would have thought that noise suppression would be more likely to be power wasted. I say this without prejudice to anyone's choice for their CB.
Cheers
I would have thought that noise suppression would be more likely to be power wasted. I say this without prejudice to anyone's choice for their CB.
Cheers
Depending on the noise suppression, it might be or not be. Restrictive exhaust can waste power; however, if an engine is DESIGNED with back-pressure as a factor, then with back-pressure it's at optimal operation.
But back pressure is not the reason for noise suppression. The trick is to bounce the sound waves against one another, cancelling them out.
That does not recover the power, either. But the noise of the exhaust, is energy - the explosive energy of fuel combusting; noise that goes into sound instead of pressure on the pistons.
WERE there a way to put that bark out the pipes, more into usable force...it would greatly increase efficiency. In any event...I don't equate power with noise. To me, an un-muffled or Cherry-Bomb equipped car or cycle, makes me think of callow, thoughtless, inconsiderate youths who probably own the noisemakers.
RE: Engine Sound - Pterodactyl_imp - 03-21-2015
What you say about back pressure control is very true. However, this is a seperate issue to noise suppression. Building an engine with back pressure control will produce efficiencies - agreed. However tweaking that to produce a quite engine inevitably leads to less efficiency. Building a noise suppression device purely for noise suppression, wether it be an inline four or a modern high bypass turbojet, will give the same result - inefficiencies.
As for the social implications I couldn't agree more.
Cheers
RE: Engine Sound - aschem_imp - 03-21-2015
Too quiet so I purchased an Arrow muffler and, IMO it now sounds much better than stock.
RE: Engine Sound - noroomtomove - 03-21-2015
A thought, the engineers at Honda have given design of the exhaust system including the muffler thought. Many years ago I spent some time talking to an engineer about what you can do with exhausts and by applying certain design concepts not in the public domain would amaze you. I would just except the fact that engineers at Honda are all over this.
RE: Engine Sound - Guth_imp - 03-21-2015
(03-18-2015, 04:29 AM)DGShannon_imp Wrote:(03-18-2015, 04:21 AM)gossman_imp Wrote: I have had louder and throater sounding bikes, I love the sound of this with the stock system. It's gentlemanly, civilized, and doesn't shout "look at me". It's everything a motorcycle should sound like on the street. Plus I don't believe in the adage "loud pipes save lives" since it doesn't take into account the Doppler Effect.
Exactly my impression the first time (and every time) I heard it. It just oozes refinement. You can hear the machinery, rather than the noise. First time I rode into one of the old historical neighborhoods around here, I was starting and stopping all up and down the street to read the historical markers. People out working in their yards. Dogs wandering about. Not a soul was offended, or even took special note of my presence. As cool as that was, and is, a part of me is getting restless for a bit more rumble and growl though...
I've had this same experience — while sporting my Staintune.
As I've said many times before, the Staintune doesn't change the volume of the exhaust all that much, but the tone is changed significantly, and much for the better to my ears. The exhaust note remains one of my favorite aspects of riding my CB1100.
I suppose that it goes without saying that the stock exhaust note was a bit too subdued for my preferences.
RE: Engine Sound - aschem_imp - 03-22-2015
If noise is power wasted, then why are racing cars/motorcycles so loud?
RE: Engine Sound - Lord Popgun - 03-22-2015
Kevin Cameron actually talks about that in the March 2015 issue of Cycle World. Page 66