Frequency-modulation detection relies on the steep lower excitation slope at 27 dB per Bark

Evidence

Since the lower slope is independent of critical-band rate, the model leads to direct proportionality between just-noticeable frequency variation, 2.1/, and the width of the critical band. The factor between the two should be 27, the constant lower slope in dB/ .1/G . This value corresponds quite well to the data outlined in Fig. 6.10. There, a factor of 25 is marked between the two values. Our model therefore assumes that the high sensitivity of our hearing system for variations in frequency is not established by the use of specialized systems that react to frequency changes. Rather, the steep slopes of the frequency selectivity of our hearing system are the reason for the high sensitivity to frequency changes. This sensitivity is based on our hearing system’s ability to indicate changes in excitation level that are of the size of only 1 dB. It seems that our hearing system is using this sensitivity for level changes together with its frequency selectivity to reach the high sensitivity for frequency variations. — Professor Dr.-Ing. Hugo Fastl, Professor Dr.-Ing. Eberhard, Psychoacoustics- Facts and Models, 1143 (#expands, via linked claim)

Categorization

• XREF: connects to: The lower slope of auditory excitation patterns is constant at 27 dB per Bark; Off-frequency tone detection benefits from envelope modulation cues produced by beating — Dijk, Pim van, Physiology, Psychoacoustics and…, 3463; Frequency discrimination stems from steep filter slopes plus 1 dB level sensitivity — Professor Dr.-Ing. Hugo Fastl, Professor Dr.-Ing. Eberhard, Psychoacoustics- Facts and Models, 1143 (+1 more)

Related

• Frequency discrimination stems from steep filter slopes plus 1 dB level sensitivity (similarity 0.91)
• The steep lower slope of the excitation pattern determines frequency modulation detection threshold (similarity 0.91)
• Frequency discrimination is finest around 0.3% near 500 Hz. (similarity 0.86)
• The ear’s upper excitation slope is essential for detecting amplitude modulation at high levels (similarity 0.86)
• Modulation fluctuation strength is governed by excitation patterns (similarity 0.85)
• Auditory modulation frequency selectivity allows inherent masker fluctuations to be separated from beating-induced ones. (similarity 0.85)
• Meaningful frequency-response specs require high resolution and narrow tolerance. (similarity 0.85)
• Frequency modulation detection is level-independent but thrice frequency-difference detection (similarity 0.85)
• Hearing becomes less sensitive to frequency variations as level increases (similarity 0.84)
• Frequency discrimination thresholds rise dramatically from 500 Hz to 5000 Hz (similarity 0.84)
• The lower slope of auditory excitation patterns is constant at 27 dB per Bark (similarity 0.84)
• Raising noise level paradoxically worsens cut-off frequency discrimination as upper slopes flatten. (similarity 0.84)
• Sideband audibility shifts the detection criterion at high modulation frequencies (similarity 0.83)
• Off-frequency tone detection benefits from envelope modulation cues produced by beating (similarity 0.83)
• Frequency-discrimination and frequency-modulation thresholds are commonly conflated in the literature (similarity 0.83)

Broader Connections

• The lower slope of auditory excitation patterns is constant at 27 dB per Bark #expands (0.95)
• Frequency discrimination stems from steep filter slopes plus 1 dB level sensitivity #expands (0.75) — Professor Dr.-Ing. Hugo Fastl, Professor Dr.-Ing. Eberhard, Psychoacoustics- Facts and Models, 1143
• Sideband audibility shifts the detection criterion at high modulation frequencies #expands (0.75)
• Off-frequency tone detection benefits from envelope modulation cues produced by beating #complicates (0.70) — Dijk, Pim van, Physiology, Psychoacoustics and…, 3463