Presentation 2007/1/18
Reduction of acoustic oscillation by means of an inverting comb filter pair implemented on FPGA
Ichiyoh MAEHARA, Shigefumi ISOBE, Kaoru ASHIHARA, Shogo KIRYU,
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Abstract(in English) Recently, in order to reduce acoustic oscillation in hearing aids and loudspeakers, an inverting comb filter pair had been proposed. This method can be implemented in small electronic equipment like hearing aids. The simulation had shown the effect of reduction of acoustic oscillation. However, influences such as nonlinearity were not considered in this simulation. In this study, an inverting comb filter pair was implemented on an FPGA. The reduction of acoustic oscillation was measured in an anechoic room with that hardware. As a result, the howling margin was 3 dB.
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Keyword(in English) acoustic oscillation / comb filter / FIR filter / hearing aid / FPGA
Paper # TL2006-50,SP2006-138,WIT2006-82
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Committee WIT
Conference Date 2007/1/18(1days)
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Language JPN
Title (in Japanese) (See Japanese page)
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Title (in English) Reduction of acoustic oscillation by means of an inverting comb filter pair implemented on FPGA
Sub Title (in English)
Keyword(1) acoustic oscillation
Keyword(2) comb filter
Keyword(3) FIR filter
Keyword(4) hearing aid
Keyword(5) FPGA
1st Author's Name Ichiyoh MAEHARA
1st Author's Affiliation Musashi Institute of Technology()
2nd Author's Name Shigefumi ISOBE
2nd Author's Affiliation Musashi Institute of Technology
3rd Author's Name Kaoru ASHIHARA
3rd Author's Affiliation National Institute of Advanced Industrial Science and Technology
4th Author's Name Shogo KIRYU
4th Author's Affiliation Musashi Institute of Technology
Date 2007/1/18
Paper # TL2006-50,SP2006-138,WIT2006-82
Volume (vol) vol.106
Number (no) 489
Page pp.pp.-
#Pages 6
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