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A comparison of wind noise in four hearing instruments

Grenner, Jan LU ; Abrahamsson, Ulla; Jernberg, Birgitta and Lindblad, Sven LU (2000) In Scandinavian Audiology 29(3). p.171-174
Abstract
Wind noise was measured in four behind-the-ear hearing instruments with different microphone openings. A silent airflow of 7 m/s was directed toward the ear of a Kemar head and the resulting wind noise was measured. The amplification was set to an insertion gain of 35 dB at 1.6 kHz. The wind noise amplitude at the position of the drum ranged from 84 to 97 dB(A). The hearing instrument with a partially covered microphone entrance proved best, whereas one with an open microphone entrance had the poorest performance. A reduction in wind noise of 6-17 dB could be achieved in all hearing instruments by using a simple windscreen made of Styrofoam. The windscreen affected the frequency response by less than 2 dB. By subtracting the insertion gain... (More)
Wind noise was measured in four behind-the-ear hearing instruments with different microphone openings. A silent airflow of 7 m/s was directed toward the ear of a Kemar head and the resulting wind noise was measured. The amplification was set to an insertion gain of 35 dB at 1.6 kHz. The wind noise amplitude at the position of the drum ranged from 84 to 97 dB(A). The hearing instrument with a partially covered microphone entrance proved best, whereas one with an open microphone entrance had the poorest performance. A reduction in wind noise of 6-17 dB could be achieved in all hearing instruments by using a simple windscreen made of Styrofoam. The windscreen affected the frequency response by less than 2 dB. By subtracting the insertion gain from the wind noise, an equivalent wind noise could be presented as a function of frequency. A considerable difference was found between the wind noise sensitivity in different hearing instruments. All could be improved by a windscreen without adversely affecting the frequency response. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Scandinavian Audiology
volume
29
issue
3
pages
171 - 174
publisher
Taylor & Francis
external identifiers
  • pmid:10990015
  • scopus:0033821563
ISSN
0105-0397
DOI
10.1080/010503900750042734
language
English
LU publication?
yes
id
790062ad-5bd5-408d-bf79-f2faa942c3b9 (old id 1117463)
date added to LUP
2008-06-27 12:37:07
date last changed
2017-01-01 07:01:32
@article{790062ad-5bd5-408d-bf79-f2faa942c3b9,
  abstract     = {Wind noise was measured in four behind-the-ear hearing instruments with different microphone openings. A silent airflow of 7 m/s was directed toward the ear of a Kemar head and the resulting wind noise was measured. The amplification was set to an insertion gain of 35 dB at 1.6 kHz. The wind noise amplitude at the position of the drum ranged from 84 to 97 dB(A). The hearing instrument with a partially covered microphone entrance proved best, whereas one with an open microphone entrance had the poorest performance. A reduction in wind noise of 6-17 dB could be achieved in all hearing instruments by using a simple windscreen made of Styrofoam. The windscreen affected the frequency response by less than 2 dB. By subtracting the insertion gain from the wind noise, an equivalent wind noise could be presented as a function of frequency. A considerable difference was found between the wind noise sensitivity in different hearing instruments. All could be improved by a windscreen without adversely affecting the frequency response.},
  author       = {Grenner, Jan and Abrahamsson, Ulla and Jernberg, Birgitta and Lindblad, Sven},
  issn         = {0105-0397},
  language     = {eng},
  number       = {3},
  pages        = {171--174},
  publisher    = {Taylor & Francis},
  series       = {Scandinavian Audiology},
  title        = {A comparison of wind noise in four hearing instruments},
  url          = {http://dx.doi.org/10.1080/010503900750042734},
  volume       = {29},
  year         = {2000},
}