문제

I'm trying to get the decibel of noise being recored from mic on Android phone. I can get amplitude value and looking for the formula to convert it into decibel.

I use following function of MediaRecorder to get amplitude.

mediaRecorder.getMaxAmplitude() ;

In another question I found the following formula.

power_db = 20 * log10(amp / amp_ref);

amp is amplitude but not sure what's amp_ref.

Is there anyone knows the correct formula?

도움이 되었습니까?

해결책

i think that is the correct formula. amp_ref is reference amplitude

라이센스 : CC-BY-SA ~와 함께 속성
제휴하지 않습니다 StackOverflow
scroll top