Supra-threshold perception and neural representation of tones presented in noise in conditions of masking release

Autoři: Katharina Egger aff001;  Torsten Dau aff001;  Bastian Epp aff001
Působiště autorů: Hearing Systems Section, Department of Health Technology, Technical University of Denmark, Kgs. Lyngby, Denmark aff001
Vyšlo v časopise: PLoS ONE 14(10)
Kategorie: Research Article
doi: 10.1371/journal.pone.0222804


The neural representation and perceptual salience of tonal signals presented in different noise maskers were investigated. The properties of the maskers and signals were varied such that they produced different amounts of either monaural masking release, binaural masking release, or a combination of both. The signals were then presented at different levels above their corresponding masked thresholds and auditory evoked potentials (AEPs) were measured. It was found that, independent of the masking condition, the amplitude of the P2 component of the AEP was similar for the same stimulus levels above masked threshold, suggesting that both monaural and binaural effects of masking release were represented at the level of the auditory pathway where P2 is generated. The perceptual salience of the signal was evaluated at equal levels above masked threshold using a rating task. In contrast to the electrophysiological findings, the subjective ratings of the perceptual signal salience were less consistent with the signal level above masked threshold and varied strongly across listeners and masking conditions. Overall, the results from the present study suggest that the P2 amplitude of the AEP represents an objective indicator of the audibility of a target signal in the presence of complex acoustic maskers.

Klíčová slova:

Acoustic signals – Electrophysiology – Evoked potentials – Sensory perception – Signal to noise ratio – Speech signal processing – Signal filtering – Signal bandwidth


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