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Randomized Controlled Trial
. 2012 Mar;16(1):49-58.
doi: 10.1177/1084713811424884. Epub 2011 Dec 4.

Audiologist-driven versus patient-driven fine tuning of hearing instruments

Affiliations
Randomized Controlled Trial

Audiologist-driven versus patient-driven fine tuning of hearing instruments

Monique Boymans et al. Trends Amplif. 2012 Mar.

Abstract

Two methods of fine tuning the initial settings of hearing aids were compared: An audiologist-driven approach--using real ear measurements and a patient-driven fine-tuning approach--using feedback from real-life situations. The patient-driven fine tuning was conducted by employing the Amplifit(®) II system using audiovideo clips. The audiologist-driven fine tuning was based on the NAL-NL1 prescription rule. Both settings were compared using the same hearing aids in two 6-week trial periods following a randomized blinded cross-over design. After each trial period, the settings were evaluated by insertion-gain measurements. Performance was evaluated by speech tests in quiet, in noise, and in time-reversed speech, presented at 0° and with spatially separated sound sources. Subjective results were evaluated using extensive questionnaires and audiovisual video clips. A total of 73 participants were included. On average, higher gain values were found for the audiologist-driven settings than for the patient-driven settings, especially at 1000 and 2000 Hz. Better objective performance was obtained for the audiologist-driven settings for speech perception in quiet and in time-reversed speech. This was supported by better scores on a number of subjective judgments and in the subjective ratings of video clips. The perception of loud sounds scored higher than when patient-driven, but the overall preference was in favor of the audiologist-driven settings for 67% of the participants.

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Conflict of interest statement

Declaration of Conflicting Interests: The authors declared no potential conflicts of interest with respect to the research, authorship, and/or publication of this article.

Figures

Figure 1.
Figure 1.
The average target curve according the NAL-NL1 at 65 dB and the average REIG values for the patient-driven and audiologist-driven settings averaged across all subjects and across left and right ears.
Figure 2.
Figure 2.
The average target curve according the NAL-NL1 at 80 dB and the average REIG values for the patient-driven and audiologist-driven settings averaged across all subjects and across left and right ears.
Figure 3.
Figure 3.
The average subjective ratings for the PD and AD settings based on judgments of the video clips for the situations: speech in quiet, in background noise, in reverberation, soft and loud sounds, and the quality of sounds. The significance of the differences between the PD and AD settings is indicated by asterisks: *p<.05.>
Figure 4.
Figure 4.
The average results of the subjective judgments, before fitting and with the new hearing aids in PD and AD settings, for all 6 categories of the AVETA questionnaire. The significance of the differences between the PD and AD settings is indicated by asterisks: *p<.05.>

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References

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