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The acceptable noise level: The effect of repeated measurements.

Brännström, Jonas LU ; Holm, Lucas LU ; Kastberg, Tobias LU and Olsen, Steen Østergaard (2014) In International Journal of Audiology 53(1). p.21-29
Abstract
Objective: This study explores if increasing number of repetitions might improve the precision of the acceptable noise level (ANL) test. Design: We measured twelve ANL repetitions, i.e. four complete ANL tests (4 × 3 repetitions), at one session using diotic presentation and a non-semantic ANL version. Study sample: Thirty-two normal-hearing adults. Results: Small order and fatigue effects were seen. We used the coefficient of repeatability (CR) to assess the repeatability; CRs ranged between 3.9 and 7.6 dB for the four ANL tests. Using the twelve ANL repetitions we removed the variability of the ANL across subjects by normalizing the data to the individual mean ANL for the twelve repetitions. The mean normalized ANL across the subjects... (More)
Objective: This study explores if increasing number of repetitions might improve the precision of the acceptable noise level (ANL) test. Design: We measured twelve ANL repetitions, i.e. four complete ANL tests (4 × 3 repetitions), at one session using diotic presentation and a non-semantic ANL version. Study sample: Thirty-two normal-hearing adults. Results: Small order and fatigue effects were seen. We used the coefficient of repeatability (CR) to assess the repeatability; CRs ranged between 3.9 and 7.6 dB for the four ANL tests. Using the twelve ANL repetitions we removed the variability of the ANL across subjects by normalizing the data to the individual mean ANL for the twelve repetitions. The mean normalized ANL across the subjects rapidly approached the ANL normalized to the individual mean for the 12 repetitions (0 dB), and after three repetitions the SD seemed to be stable at about 3 dB. Conclusions: The findings suggest that both order and fatigue affect the ANL. The findings also suggest that it may be more accurate to speak of an acceptable noise range than ANL. These findings have large implications for how we understand acceptable noise and it would explain a large part of the variability seen among normal-hearing and perhaps hearing-impaired subjects. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
International Journal of Audiology
volume
53
issue
1
pages
21 - 29
publisher
Taylor & Francis
external identifiers
  • wos:000329066200007
  • pmid:24003981
  • scopus:84891387232
ISSN
1708-8186
DOI
10.3109/14992027.2013.824116
language
English
LU publication?
yes
id
f72585a9-042a-46ee-8dcd-7d3d649bdeba (old id 4066298)
alternative location
http://www.ncbi.nlm.nih.gov/pubmed/24003981?dopt=Abstract
date added to LUP
2013-10-01 10:29:24
date last changed
2017-04-02 03:17:28
@article{f72585a9-042a-46ee-8dcd-7d3d649bdeba,
  abstract     = {Objective: This study explores if increasing number of repetitions might improve the precision of the acceptable noise level (ANL) test. Design: We measured twelve ANL repetitions, i.e. four complete ANL tests (4 × 3 repetitions), at one session using diotic presentation and a non-semantic ANL version. Study sample: Thirty-two normal-hearing adults. Results: Small order and fatigue effects were seen. We used the coefficient of repeatability (CR) to assess the repeatability; CRs ranged between 3.9 and 7.6 dB for the four ANL tests. Using the twelve ANL repetitions we removed the variability of the ANL across subjects by normalizing the data to the individual mean ANL for the twelve repetitions. The mean normalized ANL across the subjects rapidly approached the ANL normalized to the individual mean for the 12 repetitions (0 dB), and after three repetitions the SD seemed to be stable at about 3 dB. Conclusions: The findings suggest that both order and fatigue affect the ANL. The findings also suggest that it may be more accurate to speak of an acceptable noise range than ANL. These findings have large implications for how we understand acceptable noise and it would explain a large part of the variability seen among normal-hearing and perhaps hearing-impaired subjects.},
  author       = {Brännström, Jonas and Holm, Lucas and Kastberg, Tobias and Olsen, Steen Østergaard},
  issn         = {1708-8186},
  language     = {eng},
  number       = {1},
  pages        = {21--29},
  publisher    = {Taylor & Francis},
  series       = {International Journal of Audiology},
  title        = {The acceptable noise level: The effect of repeated measurements.},
  url          = {http://dx.doi.org/10.3109/14992027.2013.824116},
  volume       = {53},
  year         = {2014},
}