the invention takes the form of a handset 38 or headset plugging into the communications device 37 as a replacement or add on such as is common for communications accessories for example u201c hands free headsets u201d the communications device may be any type including cellular telephone cordless telephone wired telephone intercom announcing system or transmitting or 2 way radio this embodiment uses one shared microphone 31 partially shared signal processing circuitry 34 and either shared or separate power supply depending on the communications device 39 s design this second embodiment 39 s housing places both the microphone 31 and the silencing loudspeaker 32 in the handset 38 or headset both positioned to aim at the operator 39 s mouth 10 the microphone and silencing loudspeaker are each connected by wires to the processing circuit 34 which is located in the handset 38 or headset or in the connector housing at the communications device 37 the handset 39 s communications loudspeaker 36 is mounted in the handset and connected to the communications device 37 by wires the design must satisfy the requirements of equation 1 above the second embodiment may be powered from batteries from the wall electrical outlet or from the communications device in this second embodiment the handset 38 or headset or microphone includes a microphone 31 that converts the acoustic signal to an electrical signal for both the communications device and the acoustic silencing the microphone 31 is shielded from the acoustic silencing sound by an acoustic damping material barrier 33 which supports the microphone in the handset 38 or headset and isolates it from.