What is the inverse square law of sound?

The inverse square law 1/r2 shows the distance performance for sound intensity, an energy quantity.
But your ear drums are moved by the sound pressure vibrations using the inverse distance law 1/r for field quantities.

Scroll down to related links and look at "Sound pressure pand the inverse distance law 1/r".

Scroll down to related links and look at "Decreasing of Sound Intensity from a Point Source - Inverse square law of sound".