Bte assistive listening receiver with interchangeable crystals

H - Electricity – 04 – R

Patent

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Details

H04R 25/00 (2006.01) H04R 25/02 (2006.01)

Patent

CA 2239588

A behind-the-ear assistive listening receiver having a housing (10) containing an RF receiver. The housing includes a cavity in which two or more crystal carriers (30, 32), each contains an oscillation crystal tuned to a particular frequency, are removably insertable. The user selects one of the oscillation crystals by a switch (14). Each crystal carrier (30, 32) may contain visible indicia (33) indicating the frequency to which it is tuned. A hearing aid microphone (11) converts ambient sounds into a hearing aid signal. A mixer is provided within the housing for mixing the hearing aid signal with the RF signal to provide a mixed output signal. The mixer attenuates the maximum hearing aid signal with respect to the maximum RF signal by about 1 to 10 decibels so that the maximum RF signal will be perceptibly louder to the user than the maximum hearing aid signal.

Cette invention concerne un récepteur de prothèse auditive du type contour d'oreille qui comporte un boîtier (10) contenant un récepteur de radiofréquences (R.F.). Ledit boîtier comporte une cavité à l'intérieur de laquelle sont insérés, de manière amovible, aux moins deux porteurs (30, 32) de quartz contenant, chacun, un quartz oscillant réglé sur une fréquence particulière. L'utilisateur sélectionne un des quartz oscillants au moyen d'un commutateur (14). Chaque porteur de quartz (30, 32) peut contenir des indicateurs visibles (33) de la fréquence sur laquelle il est réglé. Un microphone de la prothèse auditive (11) convertit les sons ambiants en un signal de prothèse. Le boîtier contient un mélangeur de signaux qui mélange le signal de prothèse avec le signal R.F. de façon à délivrer en sortie un signal mixte. Ledit mélangeur atténue le signal de prothèse maximum par rapport au signal R.F. maximum d'environ 1 à 10 décibels de façon à ce que le signal R.F. soit légèrement plus perceptible pour l'utilisateur que le signal maximum de prothèse auditive.

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