A tape recording of several dozen voices talking at the same time,used as an antibugging device to make private or secret conversations inaudible to eavesdroppers. 防竊聽(tīng)多聲磁帶記錄了許多同一時(shí)刻說(shuō)話(huà)聲音的磁帶，用作一種防竊聽(tīng)裝置使私人的或秘密的談話(huà)不被偷聽(tīng)者聽(tīng)到。
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