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| Content Provider | IEEE Xplore Digital Library |
|---|---|
| Author | McKee, A.M. Goubran, R.A. |
| Copyright Year | 2004 |
| Description | Author affiliation: Dept. of Syst. & Comput. Eng., Carleton Univ., Ottawa, Ont., Canada (McKee, A.M.; Goubran, R.A.) |
| Abstract | This paper proposes methods for evaluating a multisensor system consisting of several stethoscope chest pieces simultaneously recording and storing audio data for computer-aided analysis. To illustrate this concept, we use a circular array of microphones in a free-field homogeneous medium and use delay-and-sum beamforming to combine the received signals. The evaluation methods shown here are applicable to any other non-homogeneous medium and beamforming technique. Beam shape, focus index, and localization error are the methods of performance evaluation discussed in this paper. Several beam shapes are shown and described. The proposed "focus index", a new performance metric, compares the power of signals received from different areas within the array and comes up with a numerical indicator of the focus achieved by the beamformer. This paper also describes a method for localizing a sound source in the near-field of a microphone array by comparing the delay between signals received at known microphone locations. Simulation as well as verification results are presented. |
| Starting Page | 2062 |
| Ending Page | 2065 |
| File Size | 212977 |
| Page Count | 4 |
| File Format | |
| ISBN | 0780384393 |
| DOI | 10.1109/IEMBS.2004.1403606 |
| Language | English |
| Publisher | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Publisher Date | 2004-09-01 |
| Publisher Place | USA |
| Access Restriction | Subscribed |
| Rights Holder | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Subject Keyword | Shape Stethoscope Microphone arrays Computer errors Delay Array signal processing Multisensor systems Audio recording Computer aided analysis Measurement near-field beamforming Beam shape focus index localization microphone array multisensor stethoscope |
| Content Type | Text |
| Resource Type | Article |
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