Quote:
Originally Posted by dstankov
After the installation I did another sound check.
Beginning idle = 65 db
Current idle = 58 db
Reduction of noise at idle 10 percent
Beginning 1750 RPM = 75 db
Current 1750 RPM = 66 db
Reduction of noise at 1750 RPM = 12 percent
I must say I'm impressed with the Dynamat. I did not expect to get this level of noise reduction from the engine cover only.
|
Interesting, however I think you percentage of sound reduction is wrong. Remember that sound level changes are not linear but are a log function. For every 3db of change you half or double the level.
If you do the math a 10db reduction is 10% of the sound level. You have 6 and 9db changes which Is about a 75% and 87.5%. That not bad at all.
Thor Forums
