Spontaneous emission spacing reflects the frequency step producing 180 degrees of phase shift.
Evidence
In this context, it is interesting to realize that the most probable frequency distance between neighbouring minima for threshold in quiet or between neighbouring spontaneous emissions, is closely related to the frequency distance needed to shift the phase by 1800 near the CF. The data of Fig. 3.28 at. 1, 1.6, and 2.5 kHz indicate about 70, 110 and 160 Hz, respectively. These spacings agree with the SEOAE data measured in the model and with the reciprocal value of the corresponding DEOAE-delay times of about 19, 9, and 6ms. — Professor Dr.-Ing. Hugo Fastl, Professor Dr.-Ing. Eberhard, Psychoacoustics- Facts and Models, 362
Categorization
Category: Factual Claims
- QUESTION: Interesting quantitative link between otoacoustic emission spacing and cochlear phase behavior worth verifying across sources.
Related
- Spontaneous otoacoustic emissions show a minimum frequency spacing that grows with frequency (similarity 0.85)
- Spontaneous otoacoustic emission frequencies are stable to within a fraction of a percent (similarity 0.83)
- Spontaneous and evoked otoacoustic emissions likely share a single source (similarity 0.83)
- Spacing of hearing-threshold minima matches the 180-degree phase-shift frequency distance (similarity 0.82)
- A single source generates all three kinds of otoacoustic emissions. (similarity 0.81)
- Spontaneous otoacoustic emissions align with peaks in stimulus-frequency fine structure (similarity 0.80)
- Otoacoustic emission delay times shrink from 20 ms to 4 ms as frequency rises (similarity 0.80)
- The ear is far less sensitive to phase than to amplitude of frequency components (similarity 0.79)
- Delayed otoacoustic emissions grow linearly then saturate 10-20 dB above threshold (similarity 0.79)
- Delayed otoacoustic emissions obey linear superposition at low amplitudes (similarity 0.78)
Broader Connections
- Driven resonator phase shifts 180 degrees across its resonance
#complicates(0.90) — Eric J. Heller, Why You Hear What You Hear- An…, 1222 - Resonance requires confined old amplitude returning in phase with fresh drive amplitude
#corroborates(0.85) — Eric J. Heller, Why You Hear What You Hear- An…, 904 - A finite source-to-wall distance creates a destructive interference null at the half-wavelength frequency
#expands(0.80) — Toole, Floyd E, Sound reproduction- the acoustics and…, 1459 - Dipole sources amplify through near-field capture, phase shift, and reemission by a resonator
#expands(0.75) — Eric J. Heller, Why You Hear What You Hear- An…, 1896 - Resonance occurs when round-trip distance equals whole numbers of wavelengths
#complicates(0.75) — Eric J. Heller, Why You Hear What You Hear- An…, 912