1. Measurement and adaptive suppression of acoustic feedback in hearing aids;Bustamante,1989
2. V. Hohmann, V. Hamacher, I. Holube, B. Kollmeier, T. Wittkop, Method for the operation of a hearing aid device or hearing device system as well as hearing aid device or hearing aid device system, US Patent, US 2002/0176595 A1, 2002.
3. Reducing acoustic feedback in hearing aids;Maxwell;IEEE Trans. Speech Audio Process.,1995
4. R. Porayath, J. Daniel, Acoustic feedback elimination using adaptive notch filter algorithm, US Patent, US 5999631, 1999.
5. Acoustic feedback cancellation in hearing aids;Wang,1993