Download Aalborg Universitet Reuter Andersen, Karen; Ordoñez Pizarro, Rodrigo Eduardo; Hammershøi, Dorte

Aalborg Universitet
Analysis of DPOAE fine structure of 12 symphony orchestra musicians
Reuter Andersen, Karen; Ordoñez Pizarro, Rodrigo Eduardo; Hammershøi, Dorte
Publication date:
2005
Document Version
Publisher's PDF, also known as Version of record
Link to publication from Aalborg University
Citation for published version (APA):
Reuter, K., Ordonez, R., & Hammershøi, D. (2005). Analysis of DPOAE fine structure of 12 symphony orchestra
musicians. Poster session presented at European Congress "Hearing@Work", Amsterdam, Netherlands.
General rights
Copyright and moral rights for the publications made accessible in the public portal are retained by the authors and/or other copyright owners
and it is a condition of accessing publications that users recognise and abide by the legal requirements associated with these rights.
? Users may download and print one copy of any publication from the public portal for the purpose of private study or research.
? You may not further distribute the material or use it for any profit-making activity or commercial gain
? You may freely distribute the URL identifying the publication in the public portal ?
Take down policy
If you believe that this document breaches copyright please contact us at [email protected] providing details, and we will remove access to
the work immediately and investigate your claim.
Downloaded from vbn.aau.dk on: September 18, 2016
Analysis of DPOAE fine structure of 12 symphony orchestra musicians
K. Reuter, R. Ordoñez and D. Hammershøi
Department of Acoustics, Aalborg University, Fredrik Bajers Vej 7 B5, 9220 Aalborg Øst, Denmark
When
distortion
product
otoacoustic
emissions (DPOAE) are measured with a high
frequency resolution, the DPOAE fine structure is
revealed. It is characterized by consistent maxima
and minima with notches of up to 20 dB depth (e.g.
Heitmann et al., 1996). A similar fine structure is
also known from the absolute hearing thresholds. It
has been suggested by Mauermann et al., 1999 that it
is the prevalence and character of the fine structure
that best correlate with the state of the hearing.
and after rehearsal in order to observe whether the
exposure during the rehearsal causes temporary
changes in the auditory system, e.g. a temporary
threshold shift (TTS) or changes in the DPOAE fine
structure. The DPOAE fine structure was
systematically analyzed and characterized by the
parameters ripple width, ripple height and ripple
prevalence. Details about the automatic analysis
procedure are described in Reuter & Hammershøi,
2005.
The longterm aim of this study is to
investigate whether DPOAE is a more sensitive
measure to detect early hearing loss than the absolute
hearing threshold. In a previous study the DPOAE
fine structure of 50 young, normal-hearing subjects
was analyzed according to the same analysis
procedure (preliminarily reported in Reuter &
Hammershøi, 2004). This gives the possibility to
compare the fine structure characteristics of two
different groups of subjects.
This work was supported by the Oticon Foundation
and the Danish Technical Research Council.
Heimtann, J., Waldmann, B. & Plinkert, P.K. (1996).
Eur Arch Otorhinolaryngol, 253, 167−171.
Mauermann, M., Uppenkamp, S., Van Hengel,
P. W. J. & Kollmeier, B. (1999). J. Acoust. Soc.
Am., 106(6), 3484−3491.
Reuter, K. & Hammershøi, D. (2005a). Proceedings
of Inter-Noise, Rio de Janeiro, paper 1962
(7 pages).
Reuter, K. & Hammershøi, D. (2005). Proceedings of
Forum Acusticum, Budapest (4 pages).
Reuter, K. & Hammershøi, D. (2004). Proceedings of
Int. Conf. on Acoustics, Kyoto, Vol. I, 819−822
(4 pages).
Figure 1. Examples of DPOAE fine structure for the
left ear of three musicians before (solid line) and
after (thin line) rehearsal. The grey line represents the
measurement system’s estimation of the noise floor.
In this study the DPOAE fine structure was
measured for 12 symphony orchestra musicians
before and after their rehearsal (preliminarily
reported in Reuter & Hammershøi, 2005a). The
purpose was to collect data of a group of subjects that
is homogeneously exposed to relatively high levels of
sound. The measurements were taken both before