Abstract: Privacy is often a concern when conducting a voice-based communication over a network. Users who utilize a speakerphone may provide an opportunity for unwelcome third parties to overhear the far-end portion of the call. By establishing a Session Initiation Protocol (SIP) media session utilizing signaling comprising a transducer header, a called device may utilize the desired transducer to better facilitate privacy (e.g., headset, handset). If privacy is not requested, the transducer header may indicate any transducer may be used or that use of a speakerphone is permitted. Mid-call changes in the requested privacy may also be accommodated to request transition to or from a more private transducer utilized by the far-end device.