# Sound spreading with distance
# Scope: Free-field point-source spreading; no ground or atmospheric effects.
# Status: illustrative worked example; engineering review pending.
# Inputs are example values. Checks are editable example requirements, not standards.

referenceLevel = 80
referenceDistance = 1 m
distance = 4 m

levelDb := referenceLevel-20*log10(distance/referenceDistance)

check level budget in dB: levelDb <= 70

scenario alternative: referenceLevel = 64