Internal noise in hearing aid microphones: Its causes and consequences

Hearing Journal

Volumn 56, Issue 10, 2003, Pages 46-47

  Thompson, Stephen C ^a  

^a Knowles Electronics LLC   (United States)

Author keywords

[No Author keywords available]

Indexed keywords

AIR; AMPLIFIER; ARTICLE; AUDITORY CANAL; ELECTRIC CURRENT; EQUIPMENT DESIGN; HEARING AID; MICROPHONE; MOTION; NOISE REDUCTION; OSCILLATION;

EID: 0142186619     PISSN: 07457472     EISSN: None     Source Type: Journal    
DOI: 10.1097/01.HJ.0000292920.45191.60     Document Type: Article

References (4)

1. Agnew J:, Audible circuit noise in hearing aid amplifiers. J Acoust Soc Am 1997;102(5): Pt. 1: 2793-2799.
2. The red curve in Figure 1 shows the nominal value of the one-third octave band noise level for a Knowles EM-4346 microphone model. Other hearing aid microphones range between approximately 1 dB lower to 4 dB higher noise levels.
3. International Organization for Standardization: Acoustics: Reference Zero for the Calibration of Audiometric Equipment. Part 7: Reference Threshold of Hearing under Free-Field and Diffuse Listening Conditions. ISO 389-7. New York: Acoustical Society of America, 1996.
4. Thompson SC, LoPresti JL, Ring EM, et al.: Noise in miniature microphones. J Acoust Soc Am 2002;111(2):861-866.