Abstract: A voice transmission system including a microphone (13) in combination with active sound cancellation means comprising a speaker (14) and a signal processor (17) for generating a mirror-image waveform with respect to the signal generated when speaking into the microphone. The mirror-image waveform is used to activate the speaker (14) thereby cancelling the user's voice. This provides the user with complete privacy, since the cancellation prevents the user's voice from being overheard by others, even in a crowded area.

Abstract: A pair of brackets positioned on opposite sides or opposite ends of a mattress and interconnected by a strap or the like which is disposed between the mattress and box spring or other mattress support; at least one of the opposing brackets being fitted with a holster support bar which is vertically adjustable utilizing a plurality of apertures in the bracket and conventional means of attachment such as bolts and nuts or other fasteners. The holster support bar fits through the belt loop of a belt-type holster or within the clip of a clip-on holster which is held in position adjacent to the mattress.