Which one of the following statements is true? Group of answer choices The intensity level (in dB) obeys an inverse-square distance law, but the sound intensity does not. Both the intensity level (in dB) and the sound intensity can never be negative. The sound intensity can never be negative, but the intensity level (in dB) can be negative. Both the intensity level (in dB) and the sound intensity can be negative. Both intensity level (in dB) and sound intensity obey inverse-square distance laws.

Question

Emma Keller

Physics

10 May, 14:01

Which one of the following statements is true? Group of answer choices The intensity level (in dB) obeys an inverse-square distance law, but the sound intensity does not. Both the intensity level (in dB) and the sound intensity can never be negative. The sound intensity can never be negative, but the intensity level (in dB) can be negative. Both the intensity level (in dB) and the sound intensity can be negative. Both intensity level (in dB) and sound intensity obey inverse-square distance laws.

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Frank Sexton · Answer 1

The sound intensity can not be in negative however, the intensity level (in dB) can be in negative.

And since, intensity in dB is given as 10log (I/Io).

where as Io = reference intensity.

I = intensity

If I
sound intensity obey inverse square law but for intensity in dB is = - 20log (r) + 10log (I).