摘要:
Given a hearing aid comprising a microphone, a signal processing unit and an earphone, a detector element for detecting electromagnetic disturb signals is provided, as well as a filter element that is configured dependent on the recognized disturbance signals in order to suppress the disturbance signals. Furthermore, the hearing aid as a clock element for acquiring the clock frequency of the disturbance signal detected by the detector element, whereby the clock element serves the purpose of generating the system clock frequency of the hearing aid proceeding from the clock frequency of the disturbance signal. This enables a particularly efficient disturbance signal suppression.
摘要:
A method and circuit for signal amplification in digital hearing aids, in particular in hearing aids with automatic gain control (AGC). In the method there first ensues a digitization of an input signal from the signal path of the hearing aid, then a rectification of sampled values of the digitized input signal. Next a determination of gain values is allocated to the sampled values, after which there is a smoothing of the gain values. Finally, after previous allocation of the smoothed gain values to the sampled values, allocated values, reconverted to analog form, are outputted into the signal path of the hearing aid.
摘要:
In a method for processing data, in particular signal data in a programmable digital hearing aid, first a data memory is searched to locate a stored comparison input value corresponding with a current, incoming input data value E which satisfies a comparison condition. Subsequently the data memory is searched for a stored output value allocated in a predetermined manner now-identified to the stored input data value via a characteristic function. Subsequently the determined comparison output value is emitted as an output value, and the procedure is repeated for further incoming input data values. In a circuit for processing data, particularly signal data, in a programmable hearing aid, the incoming input data value is supplied via a data input/output unit of a processor to a comparison element for determining whether there exists a stored input value corresponding to the current input data value by satisfying a comparison condition. The circuit also includes a data base in which the allocated input and output values are stored.
摘要:
A digital hearing aid with a variable directional microphone characteristic, has a signal processing unit, an earphone and at least two microphones, with a sigma-delta converter as well as a delay element following immediately thereafter in at least one microphone signal path. In a method for the operation of such a digital hearing aid, an A/D conversion with the sigma-delta converter ensues in the signal path of at least one microphone and the resulting 1-bit signal is delayed.
摘要:
In a method and a hearing device for allowing processes arising in non-synchronous fashion relative to the execution of loaded programs for signal processing in a hearing device with digital signal processing to be taken into consideration at a time approximately contemporaneous with the occurrence of the non-synchronous process, first the occurrence of a non-synchronous process is detected, followed by an interruption of the execution of the loaded program or an avoidance of the starting of a new program. In a further step a classification of the non-synchronous process with respect to the process type and a decision is made as to whether the loaded program should be continued at a new program step or a suitable new program should be selected, depending on this decision, either a continuation of the loaded program takes place at a new program step, or a selection, loading and execution of a new program is undertaken.
摘要:
A hearing aid with different assemblies for picking up, further processing and adjusting an acoustic signal to the hearing ability of a hearing impaired person, wherein a digital signal processing is performed in the hearing aid, has a buffer storage unit which shifts or transposes a defined frequency region into another frequency region which is better detectable by the wearer of the hearing aid. The buffer storage unit has individual storage segments for receiving and storing digital data representing acoustic content of an incoming audio signal, and the read-in and read-out frequency of the buffer storage unit differs by a defined factor.