Feedback whistling is one of the severe problems with hearing aids, especially in dynamic situations when the users hug, pick up a telephone, etc. This paper investigates the properties of the dynamic feedback paths of digital hearing aids and proposes a model based on a reflection assumption. The model is compared with two existing models: a direct model and an initialization model, using the measured dynamic feedback paths. The comparison shows that the proposed approach is able to model the dynamic feedback paths more efficiently and accurately in terms of mean-square error and maximum stable gain. The method is also extended to dual-microphone hearing aids to assess the possibility of relating the two dynamic feedback paths through the reflection model. However, it is found that in a complicated acoustic environment, the relation between the two feedback paths can be very intricate and difficult to exploit to yield better modeling of the dynamic feedback paths. (C) 2010 Acoustical Society of America. [DOI:10.1121/1.3290989]
Using a reflection model for modeling the dynamic feedback path of digital hearing aids
01.01.2010
Ma , G , Gran , F , Jacobsen , F & Agerkvist , F T 2010 , ' Using a reflection model for modeling the dynamic feedback path of digital hearing aids ' , Acoustical Society of America. Journal , vol. 127 , no. 3 , pp. 1458-1468 . https://doi.org/10.1121/1.3290989
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
DDC: | 629 |
New feedback detection method for performance evaluation of hearing aids
Online Contents | 2007
|Online Contents | 2011
Temporal-envelope based related processing in advanced digital hearing aids
British Library Conference Proceedings | 2004
|Measurements of Silicon Microphone Arrays in Hearing Aids
British Library Conference Proceedings | 2004
|