An all digital concha hearing aid

Author

Svean, Jarle ; Krokstad, Asbjorn ; Sorsdal, Svein

Author_Institution

SINTEF, Trondheim, Norway

fYear

1993

fDate

17-20 Oct 1993

Firstpage

85

Lastpage

88

Abstract

The paper describes an all digital concha hearing aid. The main features of this hearing aid concept are a large vent, acoustic feed-back cancellation, great flexibility by programming, a versatile equalizer, and an advanced compressor. The A/D and D/A converters have log/in characteristics and the signal processing is performed by floating point arithmetic, ensuring a large dynamic range and a signal to quantization noise ratio which is almost independent of signal level. The hearing aid contains a high speed two-way digital interface which is able to transmit measurement signals in real time. This feature provides great advantages to the fitting procedure. The main part of the hearing aid is a VLSI chip in 0.8 μm CMOS technology, measuring 44 mm²

Keywords

CMOS digital integrated circuits; VLSI; acoustic signal processing; digital signal processing chips; hearing aids; medical signal processing; 0.8 micron; A/D converter; CMOS technology; D/A converter; VLSI chip; acoustic feed-back cancellation; all digital concha hearing aid; compressor; equalizer; floating point arithmetic; high speed two-way digital interface; signal processing; signal to quantization noise ratio; vent; Acoustic signal processing; Auditory system; CMOS technology; Dynamic range; Equalizers; Floating-point arithmetic; Quantization; Semiconductor device measurement; Signal processing; Vents;

fLanguage

English

Publisher

ieee

Conference_Titel

Applications of Signal Processing to Audio and Acoustics, 1993. Final Program and Paper Summaries., 1993 IEEE Workshop on

Conference_Location

New Paltz, NY

Print_ISBN

0-7803-2078-6

Type

conf

DOI

10.1109/ASPAA.1993.379990

Filename

379990