96 decibels
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Just tried it. Registering 40db in dead silence in my garage.
50db outside with the highway traffic 1.5 miles away.
80db with bike at idle, 95 db @5k RPM ( in well insulated garage)
Doesn't seem right but will see if I can test it on the streets.
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Most certainly not with the stock exhaust.Just wondering if anyone has experience measuring sound of a bike, let's say a cbr250r at 10k rpm...
Will it be near 96 decibels?
That is the new limit here, coming into affect Aug.1 -$200 fine
Is that the level for bikes manufactured after August 1, or does everyone have to modify their existing bikes to meet the new requirements? Sounds a bit retarded to me, and if it is indeed the latter, a sneaky means of generating a lot of revenue in the first few weeks of August.
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Where is "here"?Just wondering if anyone has experience measuring sound of a bike, let's say a cbr250r at 10k rpm...
Will it be near 96 decibels?
That is the new limit here, coming into affect Aug.1 -$200 fine
Are you talking about a local ordinance?
Yip, new local bylaw. Affects any vehicle driven on the road.
I will have to see if the specify distance but it would be simply on the side of the road where the police would be setting up.
Certainly a lot of HD's around here that will get nailed.
I know my stock bike is not exactly quiet compared to minivans and cars when driven as designed
I will have to see if the specify distance but it would be simply on the side of the road where the police would be setting up.
Certainly a lot of HD's around here that will get nailed.
I know my stock bike is not exactly quiet compared to minivans and cars when driven as designed
Still would like to know where "here" is. And there is no way a stock set-up exceeds this limit. The town I live in, Whitehouse TX, passed a noise ordinance without setting any limits or protocals to test it. Basically, if some one complains, you get a ticket. I've been to every city council meeting since trying to correct this nonsense. TX.
Must need some kind of calibration if dead quiet reads 40 db....thats way off.
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Exactly. Every 3 dB increase is roughly double the loudness.
FWIW, a whisper is about 20 dB. 40 dB would be over 6.5 times louder than a whisper. Normal conversation is about 60 dB, which is another ~6.5 times louder than the 40 dB rating.
Doesn't sound that far off to me, actually, if the ambient noise in the garage was somewhere between a whisper and normal conversation. Never been in his garage, so I can't tell you...
But then again, the microphone in an iPhone is not the most discriminating and sensitive device either... I'd say the app can give you an IDEA, but not a definitive scientific result.
Calibration must be of due to sensitivity. I borrowed my bro's decibel meter and its coming up as 20db outside in silence. be it that i live next to the highway its not a "dead silence" so to speak but then you have wind noise, birds, etc. Be willing to accept that your not in a control environment so your readings wont be accurate to a certain degree. And when you guys are measuring the sound i hope you're doing it at the proper distance from your pipe. CT's ordinance is 94.8db at a distance of 50ft. Which makes sense because I haven't been pulled over by the police even when they're right next to me (knocks on wood).
My reading at 50ft w/ MGP Growler slip on and drilled airbox cover
57.3db - 59.1db at idle (1500 rpms)
82.9db - 86.7db at 5500 rpms
Any higher rpms and my pipe becomes obnoxious.
hope this info helps
My reading at 50ft w/ MGP Growler slip on and drilled airbox cover
57.3db - 59.1db at idle (1500 rpms)
82.9db - 86.7db at 5500 rpms
Any higher rpms and my pipe becomes obnoxious.
hope this info helps
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