Hearing aid and a method for enhancing speech intelligibility

Electrical audio signal processing systems and devices – Hearing aids – electrical – Noise compensation circuit

Reexamination Certificate

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Details

C381S312000

Reexamination Certificate

active

07599507

ABSTRACT:
A hearing aid (22) having a microphone (1), a processor (53) and an output transducer (12), is adapted for obtaining an estimate of a sound environment, determining an estimate of the speech intelligibility according to the sound environment estimate, and for adapting the transfer function of the hearing aid processor in order to enhance the speech intelligibility estimate. The method according to the invention achieves an adaptation of the processor transfer function suitable for optimizing the speech intelligibility in a particular sound environment. Means for obtaining the sound environment estimate and for determining the speech intelligibility estimate may be incorporated in the hearing aid processor, or they may be wholly or partially implemented in an external processing means (56), adapted for communicating data to the hearing aid processor via an appropriate link.

REFERENCES:
patent: 4548082 (1985-10-01), Engebretson et al.
patent: 6002966 (1999-12-01), Loeb et al.
patent: 6157727 (2000-12-01), Rueda
patent: 6289247 (2001-09-01), Murad et al.
patent: 1 083 769 (2001-03-01), None
patent: WO 01 31632 (2001-05-01), None
Hougast, T. et al., “Predicting Speech Intelligibility in Rooms from the Modulation Transfer Function. I. General Room Acoustics” ACUSTICA, 1980, pp. 60-72, vol. 46 Institute for Perception TNO, Soesterberg, The Netherlands.
Fletcher, Harvey et al., “The Perception of Speech and It's Relation to Telephony,” The Journal of the Acoustical Society of America, Mar. 1950 pp. 89-151 vol. 22, No. 2, Bell Telephone Laboratories, Inc. Murray Hill, New Jersey.
Dillon, Harvey, “NAL-NL1: A New Procedure For Fitting Non-Linear Hearing AIDS,” The Hearing Journal, Apr. 1999, pp. 10-16, vol. 52, No. 4.

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