Perceived loudness does not map one-to-one onto acoustic amplitude
Evidence
Although the perceived loudness of an acoustic sound is related to its amplitude, there is not a simple one-to-one functional relationship. As a psychoacoustic effect, it is affected by both the context and nature of the sound. It is also difficult to measure because it is dependent on the interpretation by listeners of what they hear. — David M. Howard, Jamie Angus, Acoustics and Psychoacoustics, 616
Categorization
- DEFINE: Clarifies the core distinction between physical sound level and perceived loudness, foundational to psychoacoustics.
- corroborated: 3 independent passages support this claim — David M. Howard, Jamie Angus, Acoustics and Psychoacoustics, 616
- XREF: connects to: A-weighted dB values misrepresent perceived loudness for complex sounds. — Professor Dr.-Ing. Hugo Fastl, Professor Dr.-Ing. Eberhard, Psychoacoustics- Facts and Models, 1176; A-weighted sound pressure level misrepresents the loudness of broadband noises; Perceived loudness of time-varying sounds tracks near-peak levels, not averages (+21 more)
Broader Connections
- Perceived loudness and physical sound intensity follow different, non-intuitive mathematical scales
#expands(0.92) — George Michelsen Foy, Zero Decibels, 53 - Loudness depends on more than physical sound intensity alone
#expands(0.90) — Dijk, Pim van, Physiology, Psychoacoustics and…, 2610 - Loudness is measured subjectively against 1 kHz reference tones
#corroborates(0.85) — Professor Dr.-Ing. Hugo Fastl, Professor Dr.-Ing. Eberhard, Psychoacoustics- Facts and Models, 1169