Phase invariance of pitch might arise from some neurons always entracking

Evidence

Two distinct models have been proposed to explain the perception of pitch: the place model and the temporal model. These two codes likely work in concert to produce the perception of pitch. For pure tones, the temporal model is likely the strongest for lowfrequency sounds and the place model for high-frequency sounds. — Jennifer Lentz, Psychoacoustics- Perception of Normal…, 1338 (#expands, via linked claim)

The Matlab code in Section 13.6.1 produces the outputs plotted in Figure 13.12, demonstrating the effects of the different processing steps. Figure 13.12a shows the waveform of the vowel signal, and the outputs of the filter bank are shown in Figure 13.12b. The latter plot is often referred to as a cochleogram. In addition, the signals following the hair-cell processing are shown in Figure 13.12c, while the correlogram and the summary autocorrelation function are illustrated in Figure 13.12d. The last of the graphs shows a clear peak at 9 ms that corresponds to the fundamental frequency of 110 Hz of the vowel input. — Ville Pulkki, Matti Karjalainen, Communication Acoustics- An…, 1655 (#corroborates, via linked claim)

The results showed that, on average, subjects selected similar frequencies in a musical interval adjustment task irrespective of whether the reference tone was a ZT or an equally salient pure tone. The adjusted frequencies were slightly flat in both cases. This might partly result from subjects’ bias towards a “just scale” with musical intervals corresponding to integer ratios of 6/5 and 3/2 for the minor third and the perfect fifth, respectively. If this was the only underlying reason, the “bias” should have been larger for the minor third than for the perfect fifth, which was not observed. The SDs of the musical interval adjustments were only slightly larger (a factor of 1.1–2.2) for the ZTs than for the PTs, with no increase in listening time. Thus, overall the results suggest that a weak musical pitch can exist in the absence of peripheral phase locking. — Dijk, Pim van, Physiology, Psychoacoustics and…, 5420 (#complicates, via linked claim)

Categorization

• XREF: connects to: Pitch perception is encoded by the timing of neural firing in the cochlea — Ville Pulkki, Matti Karjalainen, Communication Acoustics- An…, 1655; Weak musical pitch perception can persist without peripheral phase locking. — Dijk, Pim van, Physiology, Psychoacoustics and…, 5420; Phase locking fails above 5 kHz, so high-pitch perception relies on place theory (+3 more)

Related

• The temporal code mainly handles pitch at low frequencies where pitch is strong (similarity 0.89)
• Neural pitch coding produces a butte of equal-rate activity centered on the stimulus frequency (similarity 0.88)
• Weak musical pitch perception can persist without peripheral phase locking. (similarity 0.88)
• Pitch can be encoded by scalar firing rate rather than tuned vector codes (similarity 0.88)
• Auditory nerve phase locking fails at high frequencies, leaving only the place code (similarity 0.88)
• Pitch may be jointly coded by temporal patterns and their cochlear location (similarity 0.87)
• Dominant pitch models derive pitch from auditory nerve spike timing. (similarity 0.87)
• Neural signals encode auditory information through spike timing patterns (similarity 0.86)
• Low-frequency pitch judgments reflect temporal fine structure via neural phase locking (similarity 0.85)
• Pitch perception codes operate in parallel and can compensate for each other’s loss (similarity 0.85)
• Pitch perception combines place-based and timing-based neural analysis of complex tones (similarity 0.85)
• The ear switches from place to temporal pitch coding when harmonics stop being resolved (similarity 0.84)
• Place and timing theories fail to explain some complex pitch perception phenomena (similarity 0.84)
• Hearing analyzes pitch through both place and timing mechanisms (similarity 0.84)
• Pitch perception is encoded by the timing of neural firing in the cochlea (similarity 0.84)

Broader Connections

• Pitch may be jointly coded by temporal patterns and their cochlear location #expands (0.80) — Jennifer Lentz, Psychoacoustics- Perception of Normal…, 1338
• Pitch perception is encoded by the timing of neural firing in the cochlea #corroborates (0.78) — Ville Pulkki, Matti Karjalainen, Communication Acoustics- An…, 1655
• Weak musical pitch perception can persist without peripheral phase locking. #complicates (0.75) — Dijk, Pim van, Physiology, Psychoacoustics and…, 5420
• Phase locking fails above 5 kHz, so high-pitch perception relies on place theory #qualifies (0.72)