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Please use this identifier to cite or link to this item: http://hdl.handle.net/10119/7802

Title: Improvement of Detectability of Alarm Signal in Noisy Environments by Utilizing Spatial Cues
Authors: Uchiyama, Hideaki
Unoki, Masashi
Akagi, Masato
Issue Date: 2007-10
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Magazine name: 2007 IEEE Workshop on Applications of Signal Processing to Audio and Acoustics
Start page: 74
End page: 77
DOI: 10.1109/ASPAA.2007.4393017
Abstract: We measured how well alarm signals could be detected in the presence of car noise as a function of interaural time difference (ITD) and interaural phase difference (IPD). Alarm signals intended to warm people of dangerous situations need to be perceived accurately in real environments because noise in a real environment can mask the alarm signals and make them undetectable. Pulse train signals and five alarm signals were used to check whether the spatial release from masking (SRM) occurred. The results showed that SRM occurred for all signals and that alarm signal detectability could be improved by utilizing not only ITD but also IPD of the signal. This effect depended on the relationship between ITD and IPD. In addition, ITD and IPD of the arrival direction difference of the alarm signal in the masker greatly influenced occurrence of SRM: this could be interpreted as binaural masking level difference (BMLD). These results suggest that spatial cues of the arrival direction of an alarm signal in comparison with the masker direction have to be considered in conveying warnings accurately and efficiently without loss of information.
Rights: Copyright (C) 2007 IEEE. Reprinted from 2007 IEEE Workshop on Applications of Signal Processing to Audio and Acoustics. This material is posted here with permission of the IEEE. Such permission of the IEEE does not in any way imply IEEE endorsement of any of JAIST's products or services. Internal or personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution must be obtained from the IEEE by writing to pubs-permissions@ieee.org. By choosing to view this document, you agree to all provisions of the copyright laws protecting it.
URI: http://hdl.handle.net/10119/7802
Material Type: publisher
Appears in Collections:b11-1. 会議発表論文・発表資料 (Conference Papers)

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