The purpose of this study, which contains a series of successive study parts, is to methodically evaluate Phonak Hearing Systems on hard of hearing participants to grant quality control prior to each product launch.
Study Type
INTERVENTIONAL
Allocation
RANDOMIZED
Masking
SINGLE
Enrollment
27
Sonova AG
Stäfa, Canton Zürich, Switzerland
Speech intelligibility in quiet. Discrimination [%]
The data, serving as primary outcome, are collected in a series of lab appointments. The speech intelligibility in quiet will be assessed with the aid of the German rhyme test "Einsilber-Reimtest nach von Wallenberg und Kollmeier" (WaKo). The result is the speech intelligibility in percent. Descriptive statistics will be executed in the form of determining the median and quartiles. Interference statistics will be executed by applying the appropriate parametric or non-parametric test, depending on the data's distribution. A significance level of 5% is pursued.
Time frame: One week.
Speech intelligibility in noise. Speech Reception Threshold [dB SNR]
The data, serving as primary outcome, are collected in a series of lab appointments. The speech intelligibility in noise will be assessed with the aid of the German Oldenburger sentence test. The result is the Speech Reception Threshold \[dB SNR\]. Descriptive statistics will be executed in the form of determining the median and quartiles. Interference statistics will be executed by applying the appropriate parametric or non-parametric test, depending on the data's distribution. A significance level of 5% is pursued.
Time frame: One week.
Phoneme Perception Test, test no. 1.
Free field audiometry using narrow band high frequency signals to measure detection thresholds \[dB\]. Descriptive statistics will be executed in the form of determining the median and quartiles. Interference statistics will be executed by applying the appropriate parametric or non-parametric test, depending on the data's distribution. A significance level of 5% is pursued.
Time frame: Four weeks
Phoneme Perception Test, test no. 2.
Free field audiometry using high frequency phonemes to capture their recognition thresholds \[dB\]. Descriptive statistics will be executed in the form of determining the median and quartiles. Interference statistics will be executed by applying the appropriate parametric or non-parametric test, depending on the data's distribution. A significance level of 5% is pursued.
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Time frame: Four weeks
Phoneme Perception Test, test no. 3.
Free field audiometry using high frequency phonemes to capture the subjects' distinction capabilities \[confusion matrix\]. Descriptive statistics will be executed in the form of determining the median and quartiles. Interference statistics will be executed by applying the appropriate parametric or non-parametric test, depending on the data's distribution. A significance level of 5% is pursued.
Time frame: Four weeks
Diary to describe hearing impressions in everyday life
Subjects are asked to describe their subjective experiences in different listening situations, in daily life, with the aid of quantitative questionnaires. the results are "Yes/No" replies and open-ended.
Time frame: Six weeks