Hearing Aid Device
acoustic receiving system is constructed in the form of a necklace,
including an array of two or more microphones mounted on a housing
supported on the chest of the user by a conducting loop encircling the
This method enables the design of highly-drective-hearing
instruments which are comfortable, inconspicuous, and convenient to
use. The array provides the user with a dramatic improvement in speech
perception over existing hearing aid designs, particularly in the
presence of background noise, reverberation, and feedback.
B. Widrow, ``A Microphone Array
for Hearing Aids,'' IEEE Circuits and Systems Magazine,
Prof. Widrow's most recent book, Quantization Noise,
co-authored with Istvan Kollar, is available for purchase at the
Cambridge University Press website. Click on the book at left to
browse through it or to purchase a copy.