DocumentCode
3147749
Title
Electret condenser microphones for hearing aids
Author
Yamasaki, T. ; Kodama, H. ; Yasuno, Y.
Author_Institution
Rion Co. Ltd., Tokyo
fYear
2008
fDate
15-17 Sept. 2008
Abstract
Specifications of ECM for hearing aids were compared with those of ECM for cellular phones and MEMS microphones. The size of ECM for hearing aids was almost the same as other microphones. However, as for microphones for hearing aids, high sensitivity, low noise level, low current consumption and low operation voltage were demanded compared with general microphones that are use with cellular phones and other devices. Frequency spectrum of sensitivity showed a peak in 2 kHz ~ 8 kHz in ECM for hearing aids while other microphones showed constant sensitivity.
Keywords
electrets; hearing aids; microphones; MEMS microphones; cellular phones; electret condenser microphones; hearing aids; Cellular phones; Electrets; Electrochemical machining; Frequency; Hearing aids; Micromechanical devices; Microphones; Noise level; Robustness; Voltage;
fLanguage
English
Publisher
ieee
Conference_Titel
Electrets, 2008. ISE-13. 13th International Symposium on
Conference_Location
Tokyo
Print_ISBN
978-1-4244-1850-3
Electronic_ISBN
978-1-4244-1851-0
Type
conf
DOI
10.1109/ISE.2008.4814067
Filename
4814067
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