system for hindering eavesdropping, consisting of a prerecorded specially configured acoustic source material; namely, audio recordings, compact discs; and the playback unit; namely, tape player, compact disc player, control unit, power supply, acoustic playback speakers therefor

'acoust':11,33 'audio':15 'compact':17,26 'configur':10 'consist':5 'control':29 'disc':18,27 'eavesdrop':4 'hinder':3 'materi':13 'name':14,23 'playback':21,34 'player':25,28 'power':31 'prerecord':8 'record':16 'sourc':12 'speaker':35 'special':9 'suppli':32 'system':1 'tape':24 'therefor':36 'unit':22,30

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