Question
If the amplitude of a sound wave is tripled,
A.) by what factor will the intensity increase?
B.) by how many dB will the sound level increase?
A.) by what factor will the intensity increase?
B.) by how many dB will the sound level increase?
Answers
A) 3^2 = 9
Intensity is proportional to the square of ampltitude.
B) I2/I1 = 9
dB = 10 Log(I/Io)
dB2 - dB1 = 10 Log(I2/I1)= 10 Log9 = 9.5
Intensity is proportional to the square of ampltitude.
B) I2/I1 = 9
dB = 10 Log(I/Io)
dB2 - dB1 = 10 Log(I2/I1)= 10 Log9 = 9.5
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