Using sophisticated DSP circuits that isolate the echo and transmit a reverse frequency to cancel it, echo cancellation is also built into analog modems, speakerphones and quality sound cards.

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Executive Editor David Carnoy has been a leading member of CNET's Reviews team since 2000. He covers the gamut of gadgets and is a notable reviewer of mobile accessories and portable audio ...

Plus, take crystal-clear calls from your speaker with the touch of a button, thanks to the noise and echo-cancelling speakerphone. WATERPROOF & DURABLE - No more worrying about rain or spills ...

Turning off the receive side of a telephone conversation, effectively making the circuit one way (half-duplex). Echo suppressors were used to eliminate echo in satellite circuits before more ...

A device in a two-way telephone circuit that is designed to eliminate echo signals in one direction caused by signals in the other direction. Most mobile phone networks include echo suppressors ...

Amazon Echo speakers come in all shapes, sizes and types, making these devices great for putting all around the house... or ...

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These shared views can bounce off each other and make your own voice stronger, like an echo. They can also be found everywhere online, as groups of like-minded people chat in forums and comment ...