A communication system includes logic to detect a second communication device in proximity to a first communication device engaged in a call, and to provide a substantially uninterrupted transfer of selected parties to the call to the second communication device. An inverter that selectively inverts the portions based on said invert signal to reduce an average DC value of the communication signal. An air moving device is attached to the first end and a spout is connected to the second end. The acoustic wave switch has a high Q so as to enable a touch to be detected by extremely simple, low-cost circuitry.