voice-activated

[ vois-ak-tuh-vey-tid ]
/ ˈvɔɪsˌæk təˌveɪ tɪd /

adjective

(of a telephone answering machine or other device) operationally responsive to a human voice.
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Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019