Title :
Fixed versus correlation-adaptive LMS acoustic narrowband arrays for hearing enhancement
Author :
McKinney, Elaine D. ; DeBrunner, Victor E.
Author_Institution :
Sch. of Electr. Eng., Oklahoma Univ., Norman, OK, USA
Abstract :
The authors compare the performance of two-element and four-element correlation-adaptive least-mean-square (LMS) narrowband arrays versus fixed array designs in the presence of spatially separated noise sources. These arrays are designed to fit on the human head in an unobtrusive manner. Head shadow (acoustic occlusion) modeling is included. The directionality of the fixed beamformers is shown to be superior to the directionality of the adaptive beamformers, and additional processing techniques which can `directionalize´ these few-element arrays are proposed
Keywords :
acoustic arrays; acoustic signal processing; antenna phased arrays; correlation methods; hearing aids; acoustic occlusion; correlation-adaptive LMS acoustic narrowband arrays; fixed array; head shadow modelling; hearing aids; hearing enhancement; spatially separated noise sources; Acoustic arrays; Acoustic noise; Acoustic sensors; Adaptive arrays; Auditory system; Least squares approximation; Narrowband; Noise reduction; Sensor arrays; Working environment noise;
Conference_Titel :
Signals, Systems and Computers, 1992. 1992 Conference Record of The Twenty-Sixth Asilomar Conference on
Conference_Location :
Pacific Grove, CA
Print_ISBN :
0-8186-3160-0
DOI :
10.1109/ACSSC.1992.269207
