• There has been a recent cluster of spammers accessing BARFer accounts and posting spam. To safeguard your account, please consider changing your password. It would be even better to take the additional step of enabling 2 Factor Authentication (2FA) on your BARF account. Read more here.

How loud is 105 decibels?

D11b675

D11b675

New member
Joined
Apr 28, 2007
Location
san jose
Moto(s)
'16 Triumph
Street Triple 675R
what aftermarket exhaust is about 105 decibels? what does that compare? i.e. lawn mower? chain saw? i need some real world sounds to compare it to
 
forreals thats it? any thing else to compare to. say if your exhaust was 105 decibels.. how loud is that for the people around you
 
I think it's something like being close to the front at a rock concert. In many cities, they regulate bands to play no louder than 110 decibels.

I also think that wind noise depends on what kind of helmet you're wearing. My current Shoei seems to be a _lot_ quieter than that KBC I got for $80.
 
Ranger Yi said:
what aftermarket exhaust is about 105 decibels? what does that compare? i.e. lawn mower? chain saw? i need some real world sounds to compare it to
Click to expand...


I'm in san jose if you want to hear my leo exhaust on my 600. It's under 100db's, but plenty loud. I'm free right now:thumbup
 
superhawk said:
I'm in san jose if you want to hear my leo exhaust on my 600. It's under 100db's, but plenty loud. I'm free right now:thumbup
Click to expand...
You saying that under 100db is at what rpm? I am interested in hearing it as well if you are under 105 at full throttle.

Problem is though the law is 80db...... :(

Edit: Never mind posted while you were posting.. I see you are not under 105db.
 
Last edited:
I think it's 80db's at idle:teeth

White Roadster said:
You saying that under 100db is at what rpm? I am interested in hearing it as well if you are under 105 at full throttle.

Problem is though the law is 80db...... :(

Edit: Never mind posted while you were posting.. I see you are not under 105db.
Click to expand...
 
so every aftermarket exhaust is over 105? is that at WOT or are we tlaking cruisin speeds. im more concerned about cruisin speeds
 
Here's two helpful scales:

09_SoundLevels.gif


DivisionofDesign-decibel-scale_clip_image001.jpg
 
well 78 - 84 db is the EPA requirement. is it set for at a given rpm, what the bike will do below and above 35 mph, that is set for the year and model and varies. most aftermarkets are about 93 db at the same rpm, some are as loud as 102 db... keep in mind, this is rated at the rpm level for which and as soon as the bike exceeds 35mph. for example most stock ducatis are rated at 80db for 3850 rpms, but some of the loudest after market pipes will do 102 dp at that.
depends on the model. of course they get much louder as you go to higher revs. most aftermarket street bikes systems go up to about 103 db with normal riding. most people do not redline, or near to, their bikes on the streets.
loud is relative to what you are comparing it to and the ambient noise level of the area determines what is considered to be 'too loud'.

thermometer.jpg


if a leaf blower can operate at 110 db, why should not a motorcycle be allowed to.

85 db is enough to cause hearing damage.
 
Last edited:
put my ex-mother-in-law next to your bike and I guarantee when the bitch starts yappin', it'll make any aftermarket exhaust system sound nice....:cool
 
my bike in the garage idling is probably about 120db :twofinger

anyone got a db meter and want to test it out?
 
Keep in mind the decibels are logarithmic, so +10dB = twice as loud.
That is a 110dB pipe is TWICE as loud as a 100dB pipe, not 10% louder.

That being said, the stereo in my truck has been measured above 140dB so to me a 105dB pipe sounds like a sewing machine :p
That also being said, standing next to a Husqvarna SM610 with a full Leo Vince system (with the '98dB insert') can be painful - I'm assuming that the dB rating is at idle. Once that throttle is cracked though, all bets are off.

"Experimentally it was found that a 10 dB increase in sound level corresponds approximately to a perceived doubling of loudness." - http://www.phys.unsw.edu.au/jw/dB.html
 
Last edited:
* Near total silence - 0 dB
* A whisper - 15 dB
* Normal conversation - 60 dB
* A lawnmower - 90 dB
* A car horn - 110 dB
* A rock concert or a jet engine - 120 dB
* A gunshot or firecracker - 140 dB

My Leo Vince slip on is 98db with the silencer installed. Without the silencer
it is absurdly loud. The few times I have run it with out the silencer installed I leave a wake of car alarms going off.
 
Loud enough to suggest wearing earplugs, if you want to preserve your hearing. Once it's gone, it's gone, that's it. Case closed, zip up your fly, go home.
 
paroxysm said:
Keep in mind the decibels are logarithmic, so +10dB = twice as loud.
That is a 110dB pipe is TWICE as loud as a 100dB pipe, not 10% louder.

That being said, the stereo in my truck has been measured above 140dB so to me a 105dB pipe sounds like a sewing machine :p
That also being said, standing next to a Husqvarna SM610 with a full Leo Vince system (with the '98dB insert') can be painful - I'm assuming that the dB rating is at idle. Once that throttle is cracked though, all bets are off.
Click to expand...

More like 10 times louder?

A power ratio of 2 is equal to 3 dB. Conversely, a power ratio of 1/2 is equal to -3 dB. (NOTE: The -3 dB point is often referred to as a "half-power point," as when describing, say, a frequency response curve.)

A power ratio of 10 is equal to 10 dB. Conversely, a power ratio of 1/10 is equal to -10 dB

Maybe acoustics are different from RF power levels, I don't know.
 
You must log in or register to reply here.
Back
Top