If you wanted to check your db to see if you fit under a sound limit before traveling a long way to a track, how would you do this?
I’m in Barnet and currently thinking turning up at Bedford or Brands when a track day is on and asking them to check might be the easiest way?
Any other ideas?
http://www.wikihow.com/Measure-Decibels
And:
http://www.healthyhearing.com/report/47805-The-best-phone-apps-to-measure-noise-levels
You’ll probably need a friend to hold the device though as it has to be done one meter from exhaust, away from the bike to the rear.
I’m not sure what the required RPM you need to hold for the test is though. It varies according to engine configuration. Maybe someone else can answer.
it’s sometimes stamped into an exhaust can what db it is
Hmm, will that be accurate enough? I have a portable sound meter I use to measure phone speakers, this clocked me at around 115db, but I’m hoping it just isn’t that accurate at that high a level. I wouldn’t imagine my phone would be better?
it's sometimes stamped into an exhaust can what db it is me_groovyI'll check. I've not noticed though.
(Don’t know if I should point out, it’s actually for my car)
bloody hell, really? my tuono with akros is about 105.
oh ok, that makes more sense
http://www.wikihow.com/Measure-DecibelsI don't know how I clicked the link and missed all the text. I thought when I've had my bike done at track days they hold the mic right up to the exhaust?And:
http://www.healthyhearing.com/report/47805-The-best-phone-apps-to-measure-noise-levels
You’ll probably need a friend to hold the device though as it has to be done one meter from exhaust, away from the bike to the rear.
I’m not sure what the required RPM you need to hold for the test is though. It varies according to engine configuration. Maybe someone else can answer.
Jay
I’ve never seen that. It’s always been a meter away. They should have a meter-long rod attached to the meter to set the right distance. Also the rev’s you do it at are critical. Your bike will make more noise the higher it rev’s.
My RSV4 was 117db without baffle and 104.9 with it in. Talk about close.
As I understand it, the measurement of the loudness of sound, is not proportional. An increase of 10 dB is double. So to double the volume of 80 dB, you’d then be at 90 dB. To double 90 dB, you’d be hearing 100 dB.
I've never seen that. It's always been a meter away. They should have a meter-long rod attached to the meter to set the right distance. Also the rev's you do it at are critical. Your bike will make more noise the higher it rev's. JayAhh, I get it then. They put the stick to the tip of your exhaust, the mic is at the top of it, 1 meter away. That makes sense.
I’ve found this, which might be an option?
Right, I’ve done some delving and found more info on how it works. It’s only 50cm away for cars. With twin exhausts it goes in the middle. This gave me a level of 103.5 and actually the static limit is 105db, so hopefully all good!
Nice one Andy. Do you have a baffle as well?
No :( I think I should be okay now though. The 103.5 was around 5,500rpm, people seem to think they will ask 5,000rpm and I’ll actually give around 4,750rpm ;-)
Hi Andy, if you are at Brands, let me know… I may fancy a session.
No, afraid not. Snetterton on the 8th March.
Ah, ok, have fun Andy !!
Brraaapp
