Pitch strength of amplitude-modulated tones depends critically on the carrier-to-modulation frequency ratio

Evidence

However, continuous variations in parameters of sounds may clearly influence their pitch strength. For example, amplitude modulation of pure tones with low modulation frequencies (4Hz) can reduce their pitch strength by some 10 to 20%. This decrease in pitch strength holds also true for AM-tones partially masked by broadband noise. — Professor Dr.-Ing. Hugo Fastl, Professor Dr.-Ing. Eberhard, Psychoacoustics- Facts and Models, 852 (#corroborates, via linked claim)

Categorization

• XREF: connects to: An amplitude-modulated tone produces a three-line spectrum; Spectral line structure predicts pitch strength magnitude.; Slow amplitude modulation reduces pure tone pitch strength by ten to twenty percent — Professor Dr.-Ing. Hugo Fastl, Professor Dr.-Ing. Eberhard, Psychoacoustics- Facts and Models, 852 (+3 more)

Related

• Slow amplitude modulation reduces pure tone pitch strength by ten to twenty percent (similarity 0.95)
• Noise-type sounds have far weaker pitch strength than pure or complex tones. (similarity 0.91)
• An amplitude-modulated tone produces a three-line spectrum (similarity 0.86)
• Amplitude-modulated broadband noise yields only 15% of a pure tone’s pitch strength. (similarity 0.86)
• Amplitude-modulated broadband noise yields only faint pitch despite flat spectrum (similarity 0.84)
• An amplitude-modulated tone is a carrier plus two side lines (similarity 0.84)
• At very high modulation rates, listeners detect AM only via average intensity change. (similarity 0.84)
• Frequency-modulated tones grow louder only above roughly 20 Hz modulation (similarity 0.83)
• Amplitude-modulation detection improves with tone level but is level-independent for noise. (similarity 0.83)
• Amplitude-modulated white noise sounds pitched at the modulation rate. (similarity 0.83)
• Amplitude modulation of noise creates pitch with a flat spectrum (similarity 0.82)
• Amplitude-modulated tones gain an extra detection cue that noise and FM tones lack (similarity 0.82)
• Modulation frequency determines whether sound is heard as fluctuation, roughness, or multiple tones (similarity 0.82)
• Rapid AM of noise is heard via overall level, not its rapid fluctuations (similarity 0.82)
• FM-tone fluctuation strength declines with center frequency above 1 kHz while AM does not (similarity 0.82)

Broader Connections

• Slow amplitude modulation reduces pure tone pitch strength by ten to twenty percent #corroborates (0.80) — Professor Dr.-Ing. Hugo Fastl, Professor Dr.-Ing. Eberhard, Psychoacoustics- Facts and Models, 852
• Amplitude-modulated tones gain an extra detection cue that noise and FM tones lack #qualifies (0.75)