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Evaluation of a pinna compensation algorithm for sound localization and speech perception in noise
Francis Kuk1, Petri Korhonen, Chi Lau
1fkuk@widexusa.com
Purpose:
This study was designed to evaluate the effect of a pinna compensation (PC) algorithm on localization performance in the horizontal plane and speech intelligibility in noise.
Method:
Nine and 18 experienced hearing aid users with bilaterally symmetrical sensorineural hearing loss participated in the localization study and the speech-in-noise study, respectively. Performance was evaluated unaided, aided with a behind-the-ear (BTE) hearing aid with an omnidirectional microphone (Omni), and aided with the same hearing aid with the PC algorithm (Omni+PC). Localization performance was measured using 12 loudspeakers spaced 30° apart on a horizontal plane. Speech-in-noise performance was measured with speech presented from 0° or 180°. A single-blinded, repeated measures design was used.
Results:
Significant improvement in localization accuracy was found when comparing the Omni+PC condition to the Omni condition. Also, the Omni+PC condition improved the signal-to-noise ratio by 2.4 dB when compared to the Omni condition when speech was presented from the front in a diffuse noise background.
Conclusion:
Use of the PC algorithm improved localization on the horizontal plane and speech-in-noise performance. These results support use of the PC algorithm in BTE hearing aid fittings.
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