Compression is also used in land mobile radio, especially in transmit audio of professional walkie-talkies and in remote control dispatch consoles.

For transmitting audio, carbon microphones were used as the active element.

This device continuously monitors the agent's progress, transmitting audio, video, and physical telemetry to Probe Control.

The battery lasts for up to nine hours on a charge, and the unit can transmit and receive audio as far away as 30 feet.

It is thousands of times faster than the standard Internet, capable of transmitting high-quality audio and video with almost no delay.

Heil Sound entered the amateur radio market, ostensibly working to fix problems in the industry involving poorly transmitted and received audio.

An audio notch filter removes the 2,175 Hz low-level tone from the actual transmit audio.

This latter mode could be used to transmit audio in different languages, in a similar manner to that used for in-flight movies on international flights.

Its satellite service, launched on 2008, transmits digital satellite television and audio to households in India.

After this exchange of messages, the two endpoints (EP) in this figure would be transmitting audio in each direction.