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/content/asa/journal/jasa/137/4/10.1121/1.4916797
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http://aip.metastore.ingenta.com/content/asa/journal/jasa/137/4/10.1121/1.4916797
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/content/asa/journal/jasa/137/4/10.1121/1.4916797
2015-04-07
2016-12-11

Abstract

During a phone conversation, loud vocal emission from the far-end to the near-end space can disturb nearby people. In this paper, the possibility of actively controlling such unwanted sound emission using a control source placed on the mobile device is investigated. Two different approaches are tested: Global control, minimizing the potential energy measured along a volumetric space surface, and local control, minimizing the squared sound pressure at a discrete point on the phone. From the test results, both approaches can reduce the unwanted sound emission by more than 6 dB in the frequency range up to 2 kHz.

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