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The intensity levels of two people's speech are 61.5 dB and 64.0 dB, respectively. What is...

The intensity levels of two people's speech are 61.5 dB and 64.0 dB, respectively. What is the intensity level of the combined sounds?

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Answer #1

Intensity level of first person's speech = 1 = 61.5 dB

Intensity level of second person's speech = 2 = 64 dB

Intensity of sound of first person's speech = I1

Intensity of sound of second person's speech = I2

I1 = 1.412 x 10-6 W/m2

I2 = 2.512 x 10-6 W/m2

Total intensity of sound due to both people's speech = I3

I3 = I1 + I2

I3 = 1.412x10-6 + 2.512x10-6

I3 = 3.924 x 10-6 W/m2

Intensity level due to both people's speech = 3

3 = 65.94 dB

Intensity level of the combined sounds = 65.94 dB

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