Why music needs its own method
Music is dominated by low frequency energy, and low frequency behaves differently from everything else in building acoustics. It diffracts around obstacles, passes through constructions that stop mid and high frequencies comfortably, and excites structures so that the sound arriving in a neighbouring room can be structure-borne rather than airborne. A wall that provides excellent broadband insulation can be close to transparent at 63 Hz.
This is why an assessment reported as a single overall figure is close to useless for entertainment noise. The measurement has to be made in frequency bands, and the assessment has to look at where the energy actually is, not at an average that hides it.





