Title :
An all digital concha hearing aid
Author :
Svean, Jarle ; Krokstad, Asbjorn ; Sorsdal, Svein
Author_Institution :
SINTEF, Trondheim, Norway
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;
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
DOI :
10.1109/ASPAA.1993.379990
