| 摘要 |
The hearing device has an audio voltage source (10), e.g. a microphone, delivering a positive electrical audio signal, coupled to a frequency-modulated pulse generator (12), delivering a frequency-modulated burst signal and a constant voltage source (16) providing a standard voltage in the range between 25 and 75 % of the audio peak voltage. A comparator (14) compares the audio signal voltage with the standard voltage, for activating the pulse generator when the standard voltage is exceeded, the delivered pulses causing microwaves in the range between 100 MHz and 10,000 MHz to be provided by a microwave generator (19). An Independent claim for a device for providing an audible warning is also included.
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