Wiktionary
voice-activated
a. That responds to spoken commands
Usage examples of "voice-activated".
He turned to his desk, asked the voice-activated autodialer to get Nangi's home phone.
It resembled a dental surgery, with a bulkyhydraulic chair in the middle of the floor, a glass-topped desk, severalcabinets of electronic equipment, and two voice-activated computerterminals.
Collet knew these recording systems were generally placed in offices, were voice-activated to save hard disk space, and recorded snippets of conversation during the day, transmitting compressed audio files at night to avoid detection.