The purpose of this study is to investigate the individual characteristics of loudness perception in typical candidates for bilateral hearing aids. Data on spectral loudness summation and binaural loudness summation and their mutual interactions as…
ID
Source
Brief title
Condition
- Hearing disorders
Synonym
Research involving
Sponsors and support
Intervention
Outcome measures
Primary outcome
Test results on spectral loudness summation and binaural loudness summation
will be analysed for descriptive statistics.
Secondary outcome
Secondary study parameters that will be studied are the differences between
types of hearing loss and the kind of BB noise (high frequency noises and low
frequency noises). Furthermore we want to evaluate the loudness based fitting
method Fit2Ears to the NAL-NL2 fitting method by using the SRT results.
Background summary
Complaints concerning loudness settings are the most often mentioned reasons
for revisiting the hearing aid dispenser. In practice restoring the narrowband
(NB) loudness perception in hearing-impaired (HI) listeners can lead to overly
loud perception of broadband (BB) signals. The level of detail of knowledge
about loudness perception required for an effective first-fit setting is still
in debate. Two aspects of loudness perception are not taken into account:
spectral loudness summation and binaural loudness summation. This includes also
the binaural loudness perception of broadband signals. This combined effect has
to be considered because the hearing aid later will typically process binaural
broadband signals.
This research will reveal more knowledge about individual loudness perception.
The data about the different aspects of loudness perception can result in a new
first-fit prescriptive rule for hearing aids.
Study objective
The purpose of this study is to investigate the individual characteristics of
loudness perception in typical candidates for bilateral hearing aids. Data on
spectral loudness summation and binaural loudness summation and their mutual
interactions as well as the interactions with NB en BB loudness perception
will be collected in this project.
Study design
Data collection will be spread over two appointments. Participants will be
invited to the lab to take a pure tone audiometry and speech audiometry test.
After that the individual loudness perception will be measured for different
signals, presented unilaterally and bilaterally. An experimental hearing aid
will be fitted based on the loudness measurements and a the speech in nosie
will be measured. The measurement will take in total three hours, including
several breaks.
Study burden and risks
The burden for the participants is minimal. For loudness scaling we will be
using the ACALOS procedure4,5, a standardized measurement of loudness
perception. The participants will be exposed to loud stimuli. At forehand we
instruct the participants that they can stop the test at any time. When the
response of the participant during the measurement is *extremely loud* the
signal will automatically be switched off immediately. Loudness scaling can be
exhausting that is why data collection will be spread over two appointments.
Meibergdreef 9
Amsterdam 1105 AZ
NL
Meibergdreef 9
Amsterdam 1105 AZ
NL
Listed location countries
Age
Inclusion criteria
- Age above 18 years.
- Mild to moderate hearing loss.
- Symmetric hearing loss;
- Focus primarily on audiometric configurations N2, N3, N4, S2, and S3 according to Bisgaard
- Native speaker of the Dutch language
Exclusion criteria
- Language problems
- Hyperacusis
- Discrimination loss larger than 30%
Design
Recruitment
Followed up by the following (possibly more current) registration
No registrations found.
Other (possibly less up-to-date) registrations in this register
No registrations found.
In other registers
| Register | ID |
|---|---|
| CCMO | NL55890.018.15 |