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Method and device for matching the phases of microphone signals of a directional microphone of a hearing aid
Method and device for matching the phases of microphone signals of a directional microphone of a hearing aid
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机译:用于匹配助听器的定向麦克风的麦克风信号的相位的方法和装置
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摘要
The phase differences of microphones of a hearing aid microphone are to be reduced. To do this, the level of an output signal of a directional microphone is compared with an omnidirectional signal. If the level of the output signal of the differential directional microphone is above the level of the omnidirectional signal, this level difference is minimized by an adaptive, frequency-selective transit time compensation in individual frequency bands and phase matching of the microphones is thus achieved. By means of an alternative method, microphone matching is achieved in that the measurable delay of the two microphone signals is adaptively limited in individual frequency bands to a maximum value corresponding to the sound transit time between the microphones. Phase matching without knowing the position of a sound source can thus be achieved.
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