Title :
Analysis of an adaptive algorithm for feedback cancellation in hearing aids for sinusoidal signals
Author_Institution :
Dept. of Syst. Sci., Kyoto Univ., Kyoto
Abstract :
Analysis of an adaptive algorithm is presented for cancellation of the effect of the feedback path in hearing aids for sinusoidal signals. In this algorithm two LMS type adaptive filters are used. The one is acting as a notch filter for sinusoids. The other is provided for identifying the impulse response of the feedback path by using the signals filtered by the notch filter. The stationary point of the proposed algorithm is shown to be the desired one by considering the causality constraint of the adaptive filter. It is also shown that the stability near this point is guaranteed. Simulation results show the validity of the theoretical findings.
Keywords :
adaptive filters; adaptive signal processing; causality; feedback; hearing aids; least mean squares methods; notch filters; transient response; LMS type adaptive filters; adaptive algorithm; causality constraint; feedback cancellation; hearing aids; impulse response; notch filter; sinusoidal signals; Adaptive algorithm; Adaptive filters; Algorithm design and analysis; Convergence; Feedback; Hearing aids; Microphones; Signal analysis; Signal processing; Transfer functions;
Conference_Titel :
Circuit Theory and Design, 2007. ECCTD 2007. 18th European Conference on
Conference_Location :
Seville
Print_ISBN :
978-1-4244-1341-6
Electronic_ISBN :
978-1-4244-1342-3
DOI :
10.1109/ECCTD.2007.4529621
