Using the OC framework AVFAudio, obtain PCM data for the 32-bit microphone of the device, and the results obtained are all between -1 and 1 (the actual value of the fixed noise source has exceeded 100 decibels). According to the conversion results, it cannot exceed 100 decibels (20 * log10 (PCM/0.00002)). Do you know what the reason or problem is?
Output：
-0.82569194
-0.82774025
-0.83398014
-0.87197787
-0.90468484
-0.9037836
0.9085202
jumpx
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