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Sound meter

I am trying to embed a sound meter in dB in android, but I have not yet found a way to start. I switched the android API and did not find anything suitable. Can anybody help me?

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android audio
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Try using AudioRecord to record audio into the buffer, then measure dB from raw PCM data.

To initialize AudioRecord

AudioRecord record = new AudioRecord(AudioSource.MIC, SAMPLING_RATE, AudioFormat.CHANNEL_CONFIGURATION_MONO, AudioFormat.ENCODING_PCM_16BIT, bufferSize);

To read a sample from MIC

 short[] buff = new short[8000]; record.read(buff, 0, buff.length);
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This is not possible in general because of the confusion between the various “dB” values ​​and the fact that you cannot measure the physical level of sound pressure (which people usually mean when talking about “sound meters”) without calibrated devices. See my previous answers to similar questions:

  • Audio output level in a form that can be converted to decibels
  • Calculate A-weighted (or B or C) iOS SPL decibel
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