When asking for the caller's input using speech recognition, or when recording a message from the caller, you can choose to have a pacing tone (beep) played when the application is ready to receive input. See The RecoAttributes class and Recording the caller’s voice input for more information about playing pacing tones.
You can replace the system tone with any VoiceSegment object using the Call.setBeep() method, which takes one VoiceSegment as a parameter. Once set, this pacing tone will apply throughout the rest of the application. To reset to the system tone, invoke the Call.setBeep() method again, using null as a parameter.
To access the pacing tone currently set in the application, use the Call.getBeep() method.