To prevent other party from intercepting conversation of people in the vicinity of a voice data link by allowing the receiver to have a processor that converts a voice signal having transaction data into an electric signal and extracts the transaction data from the electric signal and a filter that eliminates part of signals of voice of people which may be received by the microphone.
A voice data receiver 10 prevents leakage of conversation of people in the vicinity of a voice data link formed between a receiver 10 being part of a radio acquisition device 110 and a voice signal source 10a. A microphone 14 transduces a sound wave into an electric signal through the transmission of data to other processor or through data processing in a processor 14a contained in a radio wave acquisition device 110. The arrival of the voice signal to the processor 14a is prevented and interception is inhibited by using a voice filter 16 before the microphone 14 or an electric filter 17 after the microphone 14.
SIZER THEODORE
WRIGHT GREGORY ALAN
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