Noise reduction claims should use loudness ratios to stay credible

Evidence

Therefore, reductions in noise emissions of products should be given in loudness ratios since with the exaggerating sound power ratios, in the end the public may no longer trust predictions of acoustic improvements. — Professor Dr.-Ing. Hugo Fastl, Professor Dr.-Ing. Eberhard, Psychoacoustics- Facts and Models, 1782

Categorization

• corroborated: 2 independent passages support this claim — Professor Dr.-Ing. Hugo Fastl, Professor Dr.-Ing. Eberhard, Psychoacoustics- Facts and Models, 1782
• XREF: connects to: Loudness-calculating procedures outperform simple SPL for practical noise reduction; A simple high-pass filter can replace elaborate loudness models; Total loudness is the integral of specific loudness over critical-band rate — Professor Dr.-Ing. Hugo Fastl, Professor Dr.-Ing. Eberhard, Psychoacoustics- Facts and Models, 1250 (+2 more)

Broader Connections

• Loudness-calculating procedures outperform simple SPL for practical noise reduction #corroborates (0.82)
• Total loudness is the integral of specific loudness over critical-band rate #expands (0.80) — Professor Dr.-Ing. Hugo Fastl, Professor Dr.-Ing. Eberhard, Psychoacoustics- Facts and Models, 1250
• Loudness growth with intensity requires experimental quantification, not intuition #corroborates (0.80)
• A simple high-pass filter can replace elaborate loudness models #contradicts (0.78)
• Operators lowering volume to fix loudness harms speech intelligibility #complicates (0.75) — , Toole, Floyd E - Sound reproduction-…, 1359