What Is Sound?
Decibel is defined as: 20 log 10 (P/P 0) • Thus +20 dB means an increase in pressure by a factor of 10. Threshold of hearing 0 dB softest audible 1000 Hz sound 6 dB q uiet living roo m 2 0 d B s oft whispering 2 5 dB refrigerator 40 dB soft talking 50 dB normal conversation 60 dB ...
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