Re: measuring noise levels - help needed

["Avocet" madl74]

> Using phones as SPL meters works providing you have a decent 
> calibrator and can calibrate the (external) capsule, ignoring the 
> response differences compared to a flat mic

Unfortunately making a legal conplaint about a noise would require at 
least a certified sound level meter with the approved weighting. 
That's why I suggested claiming that the bike silencer had been 
modified which is more easily checked.

David

David Brinicombe
North Devon, UK
Cogito cogito ergo cogito sum - Ambrose Bierce