Communication terminal for bidirectional communication e.g. using mobile phone, uses transceiving unit joined to microphone and to loudspeaker for sending electric audio signal via transmission channel

摘要

A communication terminal (1) has a microphone unit (3) for converting an acoustic audio signal (100) into an electric audio signal, a loudspeaker unit (4) and a transmit-receive unit (5) connected to the microphone unit (3) and to the loud-speaker unit (4) for sending the electric audio signal via the transmission channel and for receiving the electromagnetic signal (102) from the partner-communication terminal (1) via the transmission channel (2). The communication terminal in addition has a processor unit (6) with a mixer unit (7) for superposing electric audio signal with audio sequence signal (11).