Sharpness depends on the spectral envelope, not fine structure

Evidence

Taking into account the factor, g, which increases above 16 Bark to values larger than unity, using the specific loudness versus critical-band rate pattern as the distribution in question, and using the boundary condition that a narrow-band noise centred at 1 kHz has to produce a sharpness of 1 acum, an equation of the following form can be given: … In this equation, S is the sharpness to be calculated and the denominator gives the total loudness N, which has already been discussed in Chap. 8. The upper integral is like the first moment of specific loudness over critical-band rate, but uses an additional factor, g(z), that is critical-band-rate dependent. This factor is shown in Fig. 9.2 as a function of critical-band rate. Only for critical-band rates larger than 16 Bark does the factor increase from unity to a value of four at the end of the critical-band rate near 24 Bark. This takes into account that sharpness of narrow-band noises increases unexpectedly strongly at high centre frequencies. Equation (9.1) is only a weighted first moment of the critical-band rate distribution of specific loudness. — Professor Dr.-Ing. Hugo Fastl, Professor Dr.-Ing. Eberhard, Psychoacoustics- Facts and Models, 1355 (#expands, via linked claim)

Categorization

• corroborated: 2 independent passages support this claim
• XREF: connects to: Spectral envelope, not fine structure, determines perceived sharpness — Professor Dr.-Ing. Hugo Fastl, Professor Dr.-Ing. Eberhard, Psychoacoustics- Facts and Models, 1340; Sharpness depends primarily on spectral content, not on level or bandwidth.; Envelope and fine structure are mathematically orthogonal but not perceptually independent (+4 more)

Related

• Sharpness depends primarily on spectral content, not on level or bandwidth. (similarity 0.97)
• Spectral envelope, not fine structure, determines perceived sharpness (similarity 0.95)
• Sharpness is modeled as a weighted first moment of specific loudness (similarity 0.92)
• Sharpness changes little with level and bandwidth below one critical band. (similarity 0.88)
• Sound level has only a weak effect on perceived sharpness (similarity 0.87)
• Narrow-band noise sharpness grows proportionally with critical-band rate up to about 3 kHz (similarity 0.86)
• Sharp caustic edges demand frequencies far above human hearing range (similarity 0.85)
• Sharp spectral peaks, not narrow gaps, drive strong pitch perception (similarity 0.83)
• Perceived sharpness is stable across subjects and rises with spectral centre of gravity (similarity 0.83)
• Loudness rises with bandwidth beyond the critical band despite falling pattern height (similarity 0.83)
• Adding lower-frequency sound can decrease perceived sharpness (similarity 0.83)
• Loudness depends on more than physical sound intensity alone (similarity 0.83)
• Noise bandwidth changes sharpness dramatically across a wide range (similarity 0.83)
• The critical-band-rate scale mirrors hearing better than raw frequency (similarity 0.82)
• Doubling sound level from 30 to 90 dB only doubles perceived sharpness (similarity 0.82)

Broader Connections

• Envelope and fine structure are mathematically orthogonal but not perceptually independent #expands (0.85)
• Sharpness is modeled as a weighted first moment of specific loudness #expands (0.82) — Professor Dr.-Ing. Hugo Fastl, Professor Dr.-Ing. Eberhard, Psychoacoustics- Facts and Models, 1355
• Rapid changes in a sound’s amplitude envelope force broader spectral bandwidth #complicates (0.80)
• Sound level has only a weak effect on perceived sharpness #complicates (0.80) — Ville Pulkki, Matti Karjalainen, Communication Acoustics- An…, 1210
• Sharpness is a stable, subject-independent psychoacoustic quantity #qualifies (0.80)