scholarly journals Symmetry properties of binaural masked detection thresholds with respect to the dependence on interaural time delay and interaural amplitude ratio of the masker

1974 ◽  
Vol 55 (S1) ◽  
pp. S32-S32
Author(s):  
H. S. Colburn ◽  
J. S. Latimer
Keyword(s):  
Time Delay ◽  
Amplitude Ratio ◽  
Detection Thresholds ◽  
Symmetry Properties ◽  
Masked Detection ◽  
Interaural Time Delay

Time-Intensity Trade for Speech: A Temporal Speech-Stenger Effect

1976 ◽  
Vol 19 (4) ◽  
pp. 749-766 ◽  
Author(s):  
Michael J.M. Raffin ◽  
David J. Lilly ◽  
Aaron R. Thornton
Keyword(s):  
Time Delay ◽  
Clinical Application ◽  
Time Delays ◽  
Multiple Images ◽  
Potential Clinical Application ◽  
Interaural Time Delay ◽  
Lateralization Effect

Time-intensity trade for selected spondaically stressed words was investigated using a centering method for interaural time delays of 0.00, 1.00, 2.00, 2.25, 2.50, and 2.75 msec at five levels of presentation: 0-, 25-, 40-, 55-, and 70-dB HL (ANSI, 1969). Lateralization effects increased with level of presentation, with a maximum lateralization effect of between 22 and 30 dB occuring with an interaural time delay of 2.25 msec. Multiple images were perceived by all subjects with an interaural time delay of 2.75 msec and by some subjects with an interaural time delay of 2.50 msec at high levels of presentation. No “ear effect” was observed for any of the listeners. A potential clinical application is discussed for this temporal speech-Stenger effect.

scholarly journals Prediction of Human's Ability in Sound Localization Based on the Statistical Properties of Spike Trains along the Brainstem Auditory Pathway

2014 ◽  
Vol 2014 ◽  
pp. 1-11
Author(s):  
Ram Krips ◽  
Miriam Furst
Keyword(s):  
Time Delay ◽  
Lower Bounds ◽  
Sound Localization ◽  
Human Performance ◽  
Acoustic Stimulus ◽  
Auditory Pathway ◽  
Superior Olivary Complex ◽  
Optimal Estimator ◽  
Interaural Time Delay ◽  
Interaural Level Differences

The minimum audible angle test which is commonly used for evaluating human localization ability depends on interaural time delay, interaural level differences, and spectral information about the acoustic stimulus. These physical properties are estimated at different stages along the brainstem auditory pathway. The interaural time delay is ambiguous at certain frequencies, thus confusion arises as to the source of these frequencies. It is assumed that in a typical minimum audible angle experiment, the brain acts as an unbiased optimal estimator and thus the human performance can be obtained by deriving optimal lower bounds. Two types of lower bounds are tested: the Cramer-Rao and the Barankin. The Cramer-Rao bound only takes into account the approximation of the true direction of the stimulus; the Barankin bound considers other possible directions that arise from the ambiguous phase information. These lower bounds are derived at the output of the auditory nerve and of the superior olivary complex where binaural cues are estimated. An agreement between human experimental data was obtained only when the superior olivary complex was considered and the Barankin lower bound was used. This result suggests that sound localization is estimated by the auditory nuclei using ambiguous binaural information.

Auditory evoked fields to variations of interaural time delay

2005 ◽  
Vol 383 (3) ◽  
pp. 311-316 ◽  
Author(s):  
Yoshiharu Soeta ◽  
Seiji Nakagawa ◽  
Mitsuo Tonoike
Keyword(s):  
Time Delay ◽  
Auditory Evoked Fields ◽  
Evoked Fields ◽  
Interaural Time Delay

scholarly journals Tone detection thresholds in interaurally delayed noise of different bandwidths

Acta Acustica ◽  
2021 ◽  
Vol 5 ◽  
pp. 60
Author(s):  
Mathias Dietz ◽  
Jörg Encke ◽  
Kristin I Bracklo ◽  
Stephan D Ewert
Keyword(s):  
Temporal Coherence ◽  
Delay Lines ◽  
Detection Thresholds ◽  
Filter Bandwidth ◽  
Masking Release ◽  
Interaural Phase ◽  
Significant Difference ◽  
Masking Noise ◽  
Interaural Phase Difference ◽  
Interaural Time Delay

Differences between the interaural phase of a noise and a target tone improve detection thresholds. The maximum masking release is obtained for detecting an antiphasic tone (Sπ) in diotic noise (N0). It has been shown in several studies that this benefit gradually declines as an interaural time delay (ITD) is applied to the noise. This decline has been attributed to the reduced interaural coherence of the noise. Here, we report detection thresholds for a 500 Hz tone in masking noise with ITDs up to 8 ms and bandwidths from 25 to 1000 Hz. Reducing the noise bandwidth from 100 to 50 and 25 Hz increased the masking release for 8-ms ITD, as expected for increasing temporal coherence with decreasing bandwidth. For bandwidths of 100–1000 Hz no significant difference in masking release was observed. Detection thresholds with these wider-band noises had an ITD dependence that is fully described by the temporal coherence imposed by the typical monaurally determined auditory-filter bandwidth. A binaural model based on interaural phase-difference fluctuations accounts for the data without using delay lines.

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