belvolume
Belvolume is a coined term used in acoustics and signal processing to describe a logarithmic measure of the acoustic energy present within a specified three‑dimensional volume. It combines the bel, a historical logarithmic unit for sound intensity, with the concept of spatial volume to quantify how energy is distributed in space.
Definition: Let E_density be the average energy density (joules per cubic meter) inside a defined volume V,
Measurement and applications: Belvolume requires estimating the local energy density, typically from sensor arrays, simulations, or
Status and interpretation: Belvolume is not an established SI unit or widely adopted standard. It appears in
Examples: If E_density = 2 E0, then B = log10(2) ≈ 0.301 bels. If E_density = 0.1 E0, B ≈ −1