Consumer & Gadgets

Team develops bracelet that jams microphones

The very topic of digital assistants and home smart devices sporting microphones and the potential for the outside world to listen in on recordings is not a comfortable one, to say the least. It's no longer a simple case ...

Consumer & Gadgets

Amazon digital assistant Alexa gets new skill: amnesia

Amazon on Wednesday added the ability to tell its Alexa digital assistant to forget what it has heard in a move that could assuage concerns about Echo devices remembering conversations.

Microphone

A microphone (colloquially called a mic or mike; both pronounced /ˈmaɪk/) is an acoustic-to-electric transducer or sensor that converts sound into an electrical signal. In 1877, Emile Berliner invented the first microphone used as a telephone voice transmitter. Microphones are used in many applications such as telephones, tape recorders, karaoke systems, hearing aids, motion picture production, live and recorded audio engineering, FRS radios, megaphones, in radio and television broadcasting and in computers for recording voice, speech recognition, VoIP, and for non-acoustic purposes such as ultrasonic checking or knock sensors.

Most microphones today use electromagnetic induction (dynamic microphone), capacitance change (condenser microphone), piezoelectric generation, or light modulation to produce an electrical voltage signal from mechanical vibration.

This text uses material from Wikipedia, licensed under CC BY-SA