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Simulated real-ear measurements of benefit from digital feedback suppression

Ostergaard Olsen, Steen LU (2008) In International Journal of Audiology 47(2). p.51-58
Abstract
Digital feedback suppression (DFS) enables users of hearing instruments (HI) to benefit from amplification levels that normally would provoke whistling or poor sound quality. A standardized test for the measurement of DFS benefit is not available. This paper proposes and evaluates an objective method for assessment of extra feedback-free amplification (headroom) provided by a given DFS. It is shown that the whistle-free loop gain can be calculated from data obtained with simulated real-car measurements with the modified pressure method. Test-retest trials were carried out to assess the reliability of the proposed method. Also, a method was developed for defining an appropriate gain level at which the proposed measurement should be carried... (More)
Digital feedback suppression (DFS) enables users of hearing instruments (HI) to benefit from amplification levels that normally would provoke whistling or poor sound quality. A standardized test for the measurement of DFS benefit is not available. This paper proposes and evaluates an objective method for assessment of extra feedback-free amplification (headroom) provided by a given DFS. It is shown that the whistle-free loop gain can be calculated from data obtained with simulated real-car measurements with the modified pressure method. Test-retest trials were carried out to assess the reliability of the proposed method. Also, a method was developed for defining an appropriate gain level at which the proposed measurement should be carried out, It is concluded that the proposed method needs to be modified to provide useful information. (Less)
Please use this url to cite or link to this publication:
author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
modified pressure method, simulated real-ear measurements, headroom, digital feedback suppression, hearing instrument, acoustical feedback, stored equalization, concurrent equalization
in
International Journal of Audiology
volume
47
issue
2
pages
51 - 58
publisher
Taylor & Francis
external identifiers
  • wos:000253906500002
  • scopus:38849162235
ISSN
1708-8186
DOI
10.1080/14992020701643818
language
English
LU publication?
yes
id
065c1e7c-73ed-4b5f-b73c-865531114864 (old id 1186084)
date added to LUP
2008-09-03 12:25:49
date last changed
2017-01-01 04:35:36
@article{065c1e7c-73ed-4b5f-b73c-865531114864,
  abstract     = {Digital feedback suppression (DFS) enables users of hearing instruments (HI) to benefit from amplification levels that normally would provoke whistling or poor sound quality. A standardized test for the measurement of DFS benefit is not available. This paper proposes and evaluates an objective method for assessment of extra feedback-free amplification (headroom) provided by a given DFS. It is shown that the whistle-free loop gain can be calculated from data obtained with simulated real-car measurements with the modified pressure method. Test-retest trials were carried out to assess the reliability of the proposed method. Also, a method was developed for defining an appropriate gain level at which the proposed measurement should be carried out, It is concluded that the proposed method needs to be modified to provide useful information.},
  author       = {Ostergaard Olsen, Steen},
  issn         = {1708-8186},
  keyword      = {modified pressure method,simulated real-ear measurements,headroom,digital feedback suppression,hearing instrument,acoustical feedback,stored equalization,concurrent equalization},
  language     = {eng},
  number       = {2},
  pages        = {51--58},
  publisher    = {Taylor & Francis},
  series       = {International Journal of Audiology},
  title        = {Simulated real-ear measurements of benefit from digital feedback suppression},
  url          = {http://dx.doi.org/10.1080/14992020701643818},
  volume       = {47},
  year         = {2008},
}