Your professor delivers a lecture. Does the amplitude of sound waves in the classroom decrease like 1/r, where r is the distance from the professor to you?

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Kaleb Burns · Accepted Answer

In this problem, we are asked whether or not the amplitude of the sound waves by your professor decrease proportionally by       1    r   or not.Always remember that the amplitude is proportional to       1    r   if it is a spherical wave, but       1          r       of it is a surface wave.To understand this question, let us understand that sound, especially in a s-d environment, moves in a spherical direction away from the source.Thus, it is correct to say that it would decrease by       1    r  . However, current interior design might make it so that sound would be optimized so that it wouldnt decrease as much, so it may vary based on that.

Your professor delivers a lecture. Does the amplitude of sound waves in the classroom decrease like 1/r, where r is the distance from the professor to you?

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