Clinical Results of a 15-Filter Digital Auditory Prosthesis Using Selective Amplification and Compression
- 4 January 1992
- journal article
- research article
- Published by Taylor & Francis in Acta Oto-Laryngologica
- Vol. 112 (2) , 230-236
- https://doi.org/10.1080/00016489.1992.11665410
Abstract
Classical hearing aid efficiency was compared with that of a 15-filter digital auditory prosthesis in 23 patients suffering from partial sensorineural hearing loss. This device contains a microprocessor 320C25 from TEXAS Instruments. The sound signal is analysed at a sampling rate of 16 kHz. With the use of a Fast Fourier Transform (FFT), it provides the system with 15 energy levels at frequencies ranging from 0 to 8 kHz. The energy of each frequency band is multiplied by a coefficient stored in the device memory and directly dependent on the patient's audiometrie specificities. The 15 signals are then synthesized by inverse FFT and mixed in a loudspeaker. The prosthesis is a rechargable battery powered 4x 10x15 cm box programmable through a PC. The clinical results obtained with this 15-filter digital prosthesis are discussed and compared with the performances of present classical hearing aids.Keywords
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