摘要:
A hearing aid comprising a time domain codec. The codec comprises a decoder adapted to generate a decoded output signal based on an input quantization index and an encoder for generating an output quantization index based on an input signal, said encoder comprising said decoder and a predictor receiving an excitation signal derived from said decoder output signal and outputting a prediction signal. The output quantization index is determined by repeated decoding of the quantization indices in order to minimize the error between the input signal and the prediction signal, and the predictor uses a recursive autocorrelation estimate for the error minimization. The invention further provides a method of encoding an audio signal.
摘要:
A personal hearing aid (1) is adapted to be carried at the head of a person. The hearing aid comprises an EEG sensor part having electrodes (3) for measuring EEG responses from said person. The hearing aid comprises an EEG signal analyzer (5, 5') adapted for having an EEG signal transferred from the EEG sensor part, and adapted for monitoring the EEG response. The hearing aid (1) further comprises EEG stimuli controlling means adapted for performing at least one of the following: providing a stimulus to the person, requesting the person to perform a stimuli creating act, or identifying a stimuli creating ambient sound. The hearing aid comprises EEG response detection means for identifying an induced response from the EEG response caused by the stimuli, and a classifier for deciding based on said induced response if the electrodes receive EEG responses. The invention further provides a method of adjusting a hearing aid.
摘要:
A hearing aid comprising a time domain codec. The codec comprises a decoder adapted to generate a decoded output signal based on an input quantization index and an encoder for generating an output quantization index based on an input signal, said encoder comprising said decoder and a predictor receiving an excitation signal derived from said decoder output signal and outputting a prediction signal. The output quantization index is determined by repeated decoding of the quantization indices in order to minimize the error between the input signal and the prediction signal, and the predictor uses a recursive autocorrelation estimate for the error minimization. The invention further provides a method of encoding an audio signal.
摘要:
A hearing aid comprising an amplifier (303, 309, 317), an input transducer (301), an output transducer (824) and a signal processing device (825), said amplifier (303, 309, 317) and said signal processing device (825) being connected, the hearing aid further comprising at least two electrodes (201 - 205) adapted for detecting electrical signals such as brain waves, the at least two electrodes (201 - 205) being connected to a differential amplifier (303, 309, 317), which in turn is connected to the signal processing device, and means for modifying the operation of said hearing aid in dependence of the detected signals. The invention further provides a method for adaptation of a hearing aid.
摘要:
An EEG monitoring system (2) adapted to be carried continuously by a person to be monitored. The EEG monitoring system (2) comprises electrodes for measuring at least one EEG signal from the person carrying the EEG monitoring system (2). The system also com- prises signal processing means adapted to receive, process and analyze at least a part of said at least one EEG signal. Furthermore the system comprises data logging means adapted to log data relating to said at least one EEG signal and a memory for storing said data relating to said EEG signal.
摘要:
A hearing aid is provided which has at least one input transducer for providing an input signal, at least one signal processing channel receiving at least a portion of said input signal, a hearing aid processor for processing said portion of said input signal to produce at least one output signal, an output transducer responsive to said output signal, and a data logger receiving said portion of said input signal for logging of input signal data. The data logger comprises a characterization unit for characterising and logging parameters of the input signal data, and a memory unit for storing said parameters.