High-frequency transposed stimuli make auditory-nerve firing phase-lock to a low-frequency modulator
Evidence
The low-frequency stimulus was a spectrally shaped multicomponent complex (SSMC), which was a harmonic complex with a fundamental frequency (F 0 ) of 100 Hz. The spectral envelope had a flat passband and sloping edges (5×F 0 centered at 1100 Hz).The overall level of the complex was 54 dB SPL. Threshold equalizing noise, extending from 125 to 15,000 Hz, was added. The high-frequency stimulus was a ˵transposed stimulus,˶ which was a 4-kHz tone carrier amplitude-modulated with a half-wave rectified 125-Hz sinusoid (Bernstein and Trahiotis 2002 ). It is considered that the auditory-nerve firing is phase locked to the modulator waveform, which provides the cue for judging the ITD and modulation rate of the stimulus. — Dijk, Pim van, Physiology, Psychoacoustics and…, 1031
Categorization
- DEFINE: Explains the transposed-stimulus technique used to elicit phase-locking cues at high frequencies where neural phase locking to the carrier is normally absent.
- corroborated: 4 independent passages support this claim — Dijk, Pim van, Physiology, Psychoacoustics and…, 1031
- XREF: connects to: The superior olivary complex sharpens phase locking to enable left-right sound localization; Oscillatory click responses arise from phase-locked spikes separated by one period of best frequency; Transposed stimuli induce phase locking to the envelope at high carrier frequencies — Dijk, Pim van, Physiology, Psychoacoustics and…, 1039 (+4 more)
Broader Connections
- Transposed stimuli induce phase locking to the envelope at high carrier frequencies
#corroborates(0.95) — Dijk, Pim van, Physiology, Psychoacoustics and…, 1039 - Pitch perception is encoded by the timing of neural firing in the cochlea
#exemplifies(0.80) — Ville Pulkki, Matti Karjalainen, Communication Acoustics- An…, 1655 - Groups of nerves firing in staggered cycles code frequencies above 300 Hz
#expands(0.70)