Fluctuation strength depends on the critical-band interval a frequency sweep traverses

Evidence

Roughness (Daniel and Weber, 1997; Fastl and Zwicker, 2007) is a psychoacoustic quantity which is caused by relatively fast amplitude modulations (15–300 Hz) that take place for stimuli within the range of a critical band. For example, narrowband noise always sounds slightly rough, since there are random amplitude fluctuations in it. — Ville Pulkki, Matti Karjalainen, Communication Acoustics- An…, 1237 (#corroborates, via linked claim)

Categorization

• XREF: connects to: Frequency-modulated tones lose fluctuation strength above 1 kHz centre frequency; Noise fluctuations within narrow critical bands raise the masking index; Low-frequency noise fluctuates audibly while high-frequency noise is steady (+2 more)

Related

• Periodic modulation enhances perceived fluctuation strength beyond random noise (similarity 0.91)
• Fast amplitude modulations within a critical band produce roughness perception (similarity 0.90)
• Frequency-modulated tones lose fluctuation strength above 1 kHz centre frequency (similarity 0.89)
• Low modulation frequencies produce fluctuation sensation while higher ones produce roughness (similarity 0.89)
• Roughness is proportional to the product of modulation frequency and masking depth (similarity 0.89)
• Above 250 Hz modulation, frequency-modulated sounds behave as steady state. (similarity 0.88)
• Modulation frequency determines whether sound is heard as fluctuation, roughness, or multiple tones (similarity 0.87)
• Roughness grows faster with modulation depth for tones than for noise (similarity 0.86)
• Frequency modulation produces up to six times the roughness of amplitude modulation (similarity 0.86)
• Slow sound-level changes are heard as fluctuation and fast ones as roughness (similarity 0.86)
• Noise fluctuations within narrow critical bands raise the masking index (similarity 0.85)
• Modulation fluctuation strength is governed by excitation patterns (similarity 0.84)
• Periodic amplitude fluctuations are perceived as stronger than equivalent random fluctuations. (similarity 0.83)
• Perceived roughness from beating depends on basilar-membrane critical bands. (similarity 0.83)
• Roughness from harmonics requires fundamental frequencies below 100 Hz (similarity 0.83)

Broader Connections

• Frequency-modulated tones lose fluctuation strength above 1 kHz centre frequency #qualifies (0.80)
• Fast amplitude modulations within a critical band produce roughness perception #corroborates (0.80) — Ville Pulkki, Matti Karjalainen, Communication Acoustics- An…, 1237
• Dissonance depends on proportional separation falling inside the critical bandwidth, not absolute frequency difference #expands (0.80)
• Noise fluctuations within narrow critical bands raise the masking index #expands (0.75)
• Low-frequency noise fluctuates audibly while high-frequency noise is steady #qualifies (0.72)