摘要:
Hearing aid system for the in-situ fitting of hearing aids, said system comprising a separate control device, and at least one hearing aid, adapted for communication with each other, said hearing aid comprising at least one microphone, a signal processor for generating an output signal to a receiver, and means for receiving control signals from the control device. During the in-situ fitting the control device is in communication with said hearing aid for the activation of genertion of test signals, which test signals are delivered to said receiver and emitted therefrom as acoustic test signals. Further, the hearing aid comprises a switch means which when said hearing aid is in communication with the control device may optionally be switched between at least a first and a second position, said switch attenuating in the first position the output signal to the receiver using a voltage dividing resistor network, and said switch bypassing in the second position said voltage dividing resistor network so as not to influence the output signal to the receiver.
摘要:
In a remotely controllable, especially remote-control-programmable hearing aid with an external control device (1) with a keyboard (2), display device (3) and a data processing device (4) and also a hearing aid (9) controllable by the control device (1), in the control device there is a signal generator (11) actuatable and controllable via the keyboard (2) and the data processing device (4). This generator is releasably connected by a cable (12, 13, 14) to the hearing aid so that the control device (1) can be used together with the hearing aid to determine the hearing curve or, in general, the audiometric values of the wearer of the hearing aid in real conditions.
摘要:
The invention relates to a circuit arrangement for an integrated output amplifier (1) with two constant current sources (2, 3), a voltage amplifier with two inputs (5, 6) and two outputs (7, 8) and two output transistors (Q1, Q2) coupled thereto and two feedback networks (9, 10) producing negative feedback between the output transistors and the input transistors of the voltage amplifier (4) allocated thereto. The first two feedback networks (9, 10) are connected between the collectors of the output transistors (Q1, Q2) and the base electrodes of the appropriate input transistors of the voltage amplifier (4). In addition there is a third feedback network (11) coupled on the input side to the base electrode of the output transistors and on the output side, via a transistor (Q3) acting as a current sink, to the input of a current distribution network (16) having a signal input (17). The current distribution network (16) has two parallel branches (18, 19) between which the current flowing through this network, controlled by the signal at the signal input (17) can be split, the branches (18 or 19) of the current distribution network (16) being connected on the one hand to the constant current sources (2 or 3) and on the other to the inputs of the voltage amplifier (4).
摘要:
La présente invention se rapporte à une prothèse auditive intra-auriculaire destinée aux personnes souffrant de surdité ou d'insuffisance auditive, comportant une cavité auriculaire abritant un microphone, un amplificateur, un écouteur, un compartiment à pile contenant une pile, ainsi qu'un canal de compensation menant de l'intérieur vers l'extérieur, laquelle est fermée au moyen d'une plaque de recouvrement. Le canal de compensation (2, 2A) renferme partiellement ou complètement au moins une partie du canal de sortie du son (4) venant de l'écouteur (5). A cette section (2A) se joint une autre section (2B) qui se prolonge au-delà de l'écouteur (5) en direction de la plaque de recouvrement (3) et qui fait au moins partiellement partie intégrante d'un ensemble (6) abritant l'écouteur (5) et formant en même temps un passage entre les deux parties (2A, 2B) du canal de compensation.
摘要:
Un piège à cérumen pour prothèses auditives comporte un canal de son autour duquel sont agencées selon une configuration étoilée une pluralité de perforations qui relient la sortie de son d'un écouteur avec le canal de son. Un élément cylindrique (1) pourvu d'une tubulure de raccordement (3) entourant le canal de son peut être introduit dans la prothèse auditive. Un certain nombre d'éléments d'angle (4) dotés de taquets d'encliquetage (5) sont disposés à la périphérie de l'élément (1). L'ouverture (2) de sortie de son peut être fermée de l'extérieur par un capuchon (7) qui présente une rainure d'encliquetage (8) ménagée sur la paroi intérieure, et qui s'encliquette sur les taquets d'encliquetage (5).
摘要:
The present invention relates to a hearing aid with a directional characteristic, comprising at least two spaced apart input transducers and wherein transducer signal type, such as transducer noise, wind noise, sound emitted from a sound source located in the surroundings of the hearing aid, distorted signals, such as clipped signals, slew rate limited signals, etc, etc, is determined, and wherein signal processing in the hearing aid, such as transducer matching, filtering, signal combination, etc, is adapted according to the determined signal type. For example, the directional characteristic may be switched to an omnidirectional characteristic when at least one of the input transducer signals is dominated by noise or distortion, and/or adaptive matching of input transducers may be put on hold while at least one of the input transducer signals is dominated by noise or distortion.
摘要:
The present invention relates to a hearing aid with an adaptive filter for suppression of acoustic feedback in the hearing aid. The hearing aid further comprises a controller that is adapted to compensate for acoustic feedback by determination of a first parameter of an acoustic feedback loop of the hearing aid and adjustment of a second parameter of the hearing aid in response to the first parameter whereby generation of undesired sounds is substantially avoided. Hereby a gain safety margin requirement is significantly reduced.
摘要:
An in-the-ear hearing aid comprises a plug (1) for arrangement in the ear channel and having a shell-like wall facing the interior of the ear channel and an exterior faceplate (2) which together define a generally closed cavity (3), in which the individual components of the hearing aid are arranged. An acoustical link in th form of a hose or tube piece (13) is provided between an orifice (14) at the external side of the part of the wall of the plug (1) facing the interior of the ear channel and the residual volume (12) of the internal cavity of the plug (1) and forms together with said residual volume (12) an approximated acoustical circuit having a resonance frequency in the region of the first voice sound formants of the user. Thereby a significantly reduces occlusion effect can be obtained in a simple way in a completed hearing aid.
摘要:
The invention relates to a hearing aid, preferably a programmable hearing aid, having at least one microphone (1), at least one signal processor with at least one channel, an output amplifier (9) and an output transducer (10), at least one of the channels containing a signal processing circuit (4) with at least one percentile estimator (6) for the continuous determination or calculation of at least one percentile value of the input signal from a continuous analysis and evaluation of the frequency and/or amplitude distribution of the input signal, whereby the percentile value(s) serve either directly or indirectly as control signals for controlling the gain and/or the frequency response of the electronic processing circuit, the percentile estimator (6) consisting essentially of a comparator stage (12) with two inputs and two outputs, the first input being directly or indirectly connected to the input of the hearing aid, its two outputs controlling a first control stage (13) the output signals of which control a first integrator (14), the output of which, directly or indirectly, conveys a control signal to the signal processing circuit (5) and the second input of the comparator stage. The invention comprises at least a second control stage (16) connected to the first control stage (13), and at least one additional integrator (17) controlled by the second control stage (16), the output of which is connected to a further input of the second control stage (16) and to a multiplier stage (15) interconnected between the first control stage (13) and the first integrator (14).
摘要:
Described is a hearing aid with a microphone (1), a signal-transmission unit (2, 3) for forming or otherwise processing the signal, an output amplifier (4) to which an earphone (10) is connected, and a battery as the power supply. The output amplifier (4) is designed essentially as a Σ-Δamplifier and is connected to a pulse generator (8) which produces a high-frequency pulsed signal in the 1 MHz region as well as a series-connected low-pass filter (15). The input signal to the signal converter is a representation, produced by signal processing, of the low-frequency input signal to the hearing aid, this signal being converted in the signal converter into a signal which can have only two possible values. The output signal (14) thus appears, after passing through the low-pass filter, essentially as an amplified copy of the low-frequency input signal.