scholarly journals Erratum: Accounting for binaural detection as a function of masker interaural correlation: Effects of center frequency and bandwidth [J. Acoust. Soc. Am. 136, 3211–3220 (2014)]

2015 ◽  
Vol 138 (1) ◽  
pp. 22-22
Author(s):  
Leslie R. Bernstein ◽  
Constantine Trahiotis
Keyword(s):  
Center Frequency ◽  
Correlation Effects ◽  
Interaural Correlation ◽  
Binaural Detection

scholarly journals Auditory midbrain representation of a break in interaural correlation

2015 ◽  
Vol 114 (4) ◽  
pp. 2258-2264 ◽  
Author(s):  
Qian Wang ◽  
Liang Li
Keyword(s):  
Steady State ◽  
Phase Locking ◽  
Center Frequency ◽  
Auditory Midbrain ◽  
Linear Summation ◽  
Temporary Reduction ◽  
Interaural Correlation ◽  
Neuron Populations ◽  
Fine Structures ◽  
Sustained Responses

The auditory peripheral system filters broadband sounds into narrowband waves and decomposes narrowband waves into quickly varying temporal fine structures (TFSs) and slowly varying envelopes. When a noise is presented binaurally (with the interaural correlation being 1), human listeners can detect a transient break in interaural correlation (BIC), which does not alter monaural inputs substantially. The central correlates of BIC are unknown. This study examined whether phase locking-based frequency-following responses (FFRs) of neuron populations in the rat auditory midbrain [inferior colliculus (IC)] to interaurally correlated steady-state narrowband noises are modulated by introduction of a BIC. The results showed that the noise-induced FFR exhibited both a TFS component (FFRTFS) and an envelope component (FFREnv), signaling the center frequency and bandwidth, respectively. Introduction of either a BIC or an interaurally correlated amplitude gap (which had the summated amplitude matched to the BIC) significantly reduced both FFRTFS and FFREnv. However, the BIC-induced FFRTFS reduction and FFREnv reduction were not correlated with the amplitude gap-induced FFRTFS reduction and FFREnv reduction, respectively. Thus, although introduction of a BIC does not affect monaural inputs, it causes a temporary reduction in sustained responses of IC neuron populations to the noise. This BIC-induced FFR reduction is not based on a simple linear summation of noise signals.

scholarly journals Sensitivity to a Break in Interaural Correlation in Frequency-Gliding Noises

2021 ◽  
Vol 12 ◽  
Author(s):  
Langchen Fan ◽  
Lingzhi Kong ◽  
Liang Li ◽  
Tianshu Qu
Keyword(s):  
Normal Hearing ◽  
Center Frequency ◽  
Constant Frequency ◽  
Interaural Correlation ◽  
Duration Threshold ◽  
Arbitrary Noise ◽  
Noise Experiment

This study was to investigate whether human listeners are able to detect a binaurally uncorrelated arbitrary-noise fragment embedded in binaurally identical arbitrary-noise markers [a break in correlation, break in interaural correlation (BIAC)] in either frequency-constant (frequency-steady) or frequency-varied (unidirectionally frequency gliding) noise. Ten participants with normal hearing were tested in Experiment 1 for up-gliding, down-gliding, and frequency-steady noises. Twenty-one participants with normal hearing were tested in Experiment 2a for both up-gliding and frequency-steady noises. Another nineteen participants with normal hearing were tested in Experiment 2b for both down-gliding and frequency-steady noises. Listeners were able to detect a BIAC in the frequency-steady noise (center frequency = 400 Hz) and two types of frequency-gliding noises (center frequency: between 100 and 1,600 Hz). The duration threshold for detecting the BIAC in frequency-gliding noises was significantly longer than that in the frequency-steady noise (Experiment 1), and the longest interaural delay at which a duration-fixed BIAC (200 ms) in frequency-gliding noises could be detected was significantly shorter than that in the frequency-steady noise (Experiment 2). Although human listeners can detect a BIAC in frequency-gliding noises, their sensitivity to a BIAC in frequency-gliding noises is much lower than that in frequency-steady noise.

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