Robotics
Bats have the innate ability to move around in the dark, even when they cannot visually perceive their surroundings. This fascinating ability is grounded in their emission of ultrasonic chirps, which produce unique patterns ...
Feb 14, 2023 feature
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98
Machine learning & AI
Computers can be trained to better detect distant nuclear detonations, chemical blasts and volcano eruptions by learning from artificial explosion signals, according to a new method devised by a University of Alaska Fairbanks ...
Jul 22, 2022
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Hardware
"Hey, Siri, how's the weather today?" Voice recognition technology is increasingly prevalent. It is a convenient technology with broad applications. However, to get the most of its intended functions, users must stand near ...
Jul 1, 2022
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113
Computer Sciences
Ever noticed online ads following you that are eerily close to something you've recently talked about with your friends and family? Microphones are embedded into nearly everything today, from our phones, watches, and televisions ...
Apr 18, 2022
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146
Internet
Kassem Fawaz's brother was on a videoconference with the microphone muted when he noticed that the microphone light was still on—indicating, inexplicably, that his microphone was being accessed.
Apr 11, 2022
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507
Robotics
In a disaster, time is of the essence when searching for potential victims who may be difficult to find. Unmanned aerial vehicles make the perfect platform for state-of-the-art technology allowing emergency crews to find ...
Jun 8, 2021
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Consumer & Gadgets
Working from home now means taking lots of virtual meetings. And if you find that your colleagues can't hear you very well, or complain about distracting background noise (think kids, music, doorbells), we've got a great ...
Jun 9, 2020
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Consumer & Gadgets
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 ...
Feb 19, 2020 weblog
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Consumer & Gadgets
Smart home devices from Google, Amazon and Facebook are engineered to listen for your commands and respond to them. Usually, they only engage when you say your "wake" word such as "OK, Google" or "Hey, Google."
Jan 2, 2020
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Consumer & Gadgets
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.
May 30, 2019
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25
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
