Max level volume

brelto85 · Mar 25, 2013

Hi,

how to calculate the max of microphone level audio?

thanks
Alberto

Informatix · Mar 25, 2013

I'm not sure to understand the question.
The max value for mediaRecorder.getMaxAmplitude is 32768 but on some devices it doesn't go higher than 16384.

brelto85 · Mar 25, 2013

my goal is to calculate the level of the environment audio

i realized that each device returns a different value of mAudioRecorder.AudioMaxAmplitude() also if tested in a same environment and at the same time

my idea is to calculate max level audio allowed for the device and calculate the percentage level of the environment audio

Informatix · Mar 25, 2013

brelto85 said:
my goal is to calculate the level of the environment audio

i realized that each device returns a different value of mAudioRecorder.AudioMaxAmplitude() also if tested in a same environment and at the same time

my idea is to calculate max level audio allowed for the device and calculate the percentage level of the environment audio

You have to calibrate each device individually.

brelto85 · Mar 25, 2013

ok, but how to?
how to calculate for each devive? using .AudioSourceMax property of AudioRecorder library?

Informatix · Mar 25, 2013

brelto85 said:
ok, but how to?
how to calculate for each devive? using .AudioSourceMax property of AudioRecorder library?

I have no idea of the usefulness of AudioSourceMax.

To calibrate a mic, record a loud noise, get the value of AudioMaxAmplitude and consider that's the maximum recording level. It can't be computed. There's no formula and no hardware information to do that.

Max level volume

brelto85

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