The image now was silent, for Halsey was not bothering with audio connection.
It's audio of some sort, sir, but there's lots more to the signal than that.
"Pick him up," the Captain turned and ordered the audio controller.
The Captain was on an audio circuit, talking to an Assistant Commissioner.
Though all stations were on the screen at all times, their audio channels could be controlled.
To the Thawing Wind (audio) He calls on change through the violence of the elements.
Keep your audio communicator in the jet boat on at all times.
And the radar is too complicated to change over to audio communications.
He imposed the audio system upon the inconceivably high frequency of their carrier wave and spoke in the Osnomian tongue.
By trial and error Jason brought in the audio for the stations he wanted and tried to follow the course of the attack.