Raising sound pressure by 40 dB roughly triples perceived fluctuation strength
Evidence
With increasing sound pressure level and for all sounds considered, the fluctuation strength increases. For amplitude-modulated sounds (Fig. 1O.2a and b), the increase is somewhat more prominent than for the frequency-modulated pure tone (Fig. 1O.2c). With an increase of 40 dB in sound pressure level, fluctuation strength of modulated sounds increases on average by a factor of about 2.5 (1.7 to 3). — Professor Dr.-Ing. Hugo Fastl, Professor Dr.-Ing. Eberhard, Psychoacoustics- Facts and Models, 1388
Categorization
Category: Factual Claims
Related
- A 40-dB level rise increases fluctuation strength by a factor of roughly 2.5 (similarity 0.97)
- Amplitude-modulated loudness directly increases perceived fluctuation strength (similarity 0.87)
- Fluctuation strength requires at least 3 dB modulation depth before it rises (similarity 0.87)
- Roughness grows by a factor of three per 40 dB of level increase (similarity 0.87)
- Pitch strength rises only modestly with level while loudness explodes. (similarity 0.86)
- Slow amplitude modulation reduces pure tone pitch strength by ten to twenty percent (similarity 0.83)
- Fluctuation strength is predictable from excitation patterns (similarity 0.83)
- A 10 dB increase always doubles perceived loudness above 40 dB (similarity 0.83)
- Modulation fluctuation strength is governed by excitation patterns (similarity 0.83)
- Periodic amplitude fluctuations are perceived as stronger than equivalent random fluctuations. (similarity 0.82)
- FM-tone fluctuation strength declines with center frequency above 1 kHz while AM does not (similarity 0.82)
- Doubling pressure yields 6 dB and a tenfold increase yields 20 dB. (similarity 0.82)
- Below 40 phon, loudness falls faster than the 10-phon-per-doubling rule predicts (similarity 0.81)
- A 1 dB level change anchors the model for just-noticeable slow sound variations (similarity 0.81)
- Loudness is not reducible to sound pressure level or signal power (similarity 0.81)