Hear sounds captured from Mars by NASA's Perseverance rover

Thanks to two microphones aboard NASA's Perseverance rover, the mission has recorded nearly five hours of Martian wind gusts, rover wheels crunching over gravel, and motors whirring as the spacecraft moves its arm. These ...

New laser-based microphone calibration system

Researchers at the National Institute of Standards and Technology (NIST) have conducted the first demonstration of a faster and more accurate way to calibrate certain kinds of microphones.

Drones can determine the shape of a room by listening

Imagine a loudspeaker is placed in a room with a few microphones. When the loudspeaker emits a sound impulse, the microphones receive several delayed responses as the sound reverberates from each wall in the room. These first-order ...

Confirmed: In space no one can hear you scream

The old tagline "in space no one can hear you scream" has been confirmed by a South African mother loudly shouting for her children to tidy their room from 33,000 meters above the ground. Or not so loudly, as the case appears ...

Research team introduces wearable audio dataset

Researchers studying wearable listening technology now have a new data set to use, thanks to University of Illinois at Urbana-Champaign graduate student Ryan Corey and his team.

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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