sidetone

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sidetone

[′sīd‚tōn]
(communications)
The sound of the speaker's own voice as heard in his telephone receiver; the effect is undesirable and is usually suppressed by special circuits.

sidetone

In a telephone handset, sending a small amount of your voice signal back into your ear through the handset so that you hear yourself talk. It makes the conversation more comfortable when you hear a little bit of your own speech, because you know the line isn't dead. See hybrid.
References in periodicals archive ?
The rpm was down to 42 percent, and the caution was cycling on and off, tripping the master-caution side tone in my helmet every four seconds.
The altitude-warning indication is a bright yellow light on the gauge, with no audible side tones, and it remains on until the altitude bug is reset, or the aircraft climbs above the selected altitude.