Title :
A new approach for modelling the dynamic feedback path of digital hearing aids
Author :
Ma, Guilin ; Gran, Fredrik ; Jacobsen, Finn ; Agerkvist, Finn
Author_Institution :
GN ReSound A/S, Ballerup
Abstract :
This paper proposes a reflection model for the dynamic feedback path of digital hearing aids and compares it with two existing models: a direct model and an initialization model, based on the measured dynamic feedback paths. The comparison shows that the proposed model is superior to the existing two models in terms of maximum stable gain (MSG). For hearing aids with dual microphones, the possibility of relating the two dynamic feedback paths is also investigated. It is shown that in a complicated acoustic environment, the relation between the two feedback paths can be very intricate and difficult to exploit in modelling the dynamic feedback paths.
Keywords :
acoustic signal processing; hearing aids; microphones; acoustic signal processing; delay estimation; digital hearing aids; dynamic feedback path modelling; feedback cancellation; maximum stable gain; reflection model; Acoustic measurements; Acoustic reflection; Adaptive filters; Auditory system; Delay estimation; Hearing aids; Jacobian matrices; Microphones; Output feedback; Signal processing; Feedback cancellation; delay estimation; dynamic feedback path modelling; hearing aids;
Conference_Titel :
Acoustics, Speech and Signal Processing, 2009. ICASSP 2009. IEEE International Conference on
Conference_Location :
Taipei
Print_ISBN :
978-1-4244-2353-8
Electronic_ISBN :
1520-6149
DOI :
10.1109/ICASSP.2009.4959557