A-weighted sound power ratios overestimate perceived loudness differences in noise emissions.

Evidence

In summary, the loudness of noise emissions can be physically measured by a loudness meter in line with subjective evaluations for rather different kinds of noises. Ratios of A-weighted sound power - although frequently used in advertisings - usually overestimate differences in the loudness of noise emissions substantially. — Professor Dr.-Ing. Hugo Fastl, Professor Dr.-Ing. Eberhard, Psychoacoustics- Facts and Models, 1797

Categorization

• XREF: connects to: Cultural background outweighs sound energy in perceived noise — Almo Farina, Soundscape Ecology: Principles,…, 1537