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Music & Acoustics

Sound Intensity (Inverse Square)

I = P / (4π r²) ∝ 1/r²
Sound Intensity (Inverse Square)

In a free field sound spreads over an ever-larger sphere, so intensity falls as 1/r² — doubling the distance quarters it (a 6 dB drop), and here the whole curve scales with the source power P.

Computed & rendered in pure C# on the frozen OnlyCSharp 1.8 library — animation baked to GIF with the library's own Gif encoder (no GPU, no ffmpeg, no external packages).