The source of a sound wave has a power of 1.00 μW. If it is a point source, (a) what is the intensity 3.00 m away and (b) what is the sound level in decibels at that distance?
Explain your work. Thanks! :)
2007-12-05 12:42:58 · 2 answers · asked by Anonymous in Science & Mathematics ➔ Physics
The intensity (power/area) is 1 μW/area of 3-m radius sphere = 1 μW/(4pi*3^2). Units are W/m^2.
The dB sound level = 10*log-base-10(intensity/1E-12 W/m^2).
2007-12-05 14:26:49 · answer #1 · answered by kirchwey 7 · 0⤊ 0⤋
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2016-12-10 13:54:39 · answer #2 · answered by molinari 4 · 0⤊ 0⤋