TY - GEN
T1 - Binaural detection thresholds are differently affected by interaural level differences in S0 and Sπ conditions
AU - Bischof, Norbert F.
AU - Seeber, Bernhard U.
N1 - Publisher Copyright:
© 2023 Norbert F Bischof and Bernhard U. Seeber. This is an open-access article distributed under the terms of the Creative Commons Attribution 3.0 Unported License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
PY - 2023
Y1 - 2023
N2 - The dependency of binaural detection thresholds on interaural level differences was investigated. Detection thresholds were measured for four discrete tones with either 100, 500, 1000 or 2500 Hz presented in diotic, uniform exciting noise (N0) via headphones using an adaptive forced choice method. The sine tones were presented either in-phase (S0) or anti-phasic (Sπ), and the interaural level difference (ILD) of the tone was varied within 15 dB. Preliminary detection thresholds show that unmasking depends on the applied ILD. In the N0S0 condition, thresholds of low-frequency tones decrease by up to 7 dB for an ILD of 15 dB, which almost corresponds to the monaural threshold. This decrease with increasing ILD cannot be observed at 2500 Hz. In the N0Sπ condition, however, the increase in thresholds with increasing ILD is approximately equal for all frequencies. The resulting decrease in unmasking seems to follow the level decrease of the two summed sine tones with increasing ILD. In particular, the results of the N0Sπ condition suggest that the amount of binaural unmasking is more affected by the ILD than in the N0S0 condition.
AB - The dependency of binaural detection thresholds on interaural level differences was investigated. Detection thresholds were measured for four discrete tones with either 100, 500, 1000 or 2500 Hz presented in diotic, uniform exciting noise (N0) via headphones using an adaptive forced choice method. The sine tones were presented either in-phase (S0) or anti-phasic (Sπ), and the interaural level difference (ILD) of the tone was varied within 15 dB. Preliminary detection thresholds show that unmasking depends on the applied ILD. In the N0S0 condition, thresholds of low-frequency tones decrease by up to 7 dB for an ILD of 15 dB, which almost corresponds to the monaural threshold. This decrease with increasing ILD cannot be observed at 2500 Hz. In the N0Sπ condition, however, the increase in thresholds with increasing ILD is approximately equal for all frequencies. The resulting decrease in unmasking seems to follow the level decrease of the two summed sine tones with increasing ILD. In particular, the results of the N0Sπ condition suggest that the amount of binaural unmasking is more affected by the ILD than in the N0S0 condition.
KW - binaural hearing
KW - dichotic listening
KW - masking
UR - http://www.scopus.com/inward/record.url?scp=85191237285&partnerID=8YFLogxK
M3 - Conference contribution
AN - SCOPUS:85191237285
T3 - Proceedings of Forum Acusticum
BT - Forum Acusticum 2023 - 10th Convention of the European Acoustics Association, EAA 2023
PB - European Acoustics Association, EAA
T2 - 10th Convention of the European Acoustics Association, EAA 2023
Y2 - 11 September 2023 through 15 September 2023
ER -