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This is an accepted version of this page This is the latest accepted revision, reviewed on 5 February 2025. American historian and socialist thinker (1922–2010) Howard Zinn Zinn in 2009 Born (1922-08-24) August 24, 1922 New York City, U.S. Died January 27, 2010 (2010-01-27) (aged 87) Santa Monica, California, U.S. Education New York University (BA) Columbia University (MA, PhD) Occupation(s ...
On 25 August 2009, U.S. patent 7,580,533 was issued for a device that uses a laser beam and smoke or vapor to detect sound vibrations in free air ("Particulate Flow Detection Microphone based on a laser-photocell pair with a moving stream of smoke or vapor in the laser beam's path"). Sound pressure waves cause disturbances in the smoke that in ...
The boundary microphone can be used as a piano mic by placing it inside the piano lid, an approach which can obtain better pickup of the piano's mix of sharp percussive transients and gentle undertones than other microphone options. Boundary mics are used on hockey boards for body check sound effects. They are also commonly used to record full ...
One 4-year-old girl made the most of her school's Christmas performance this holiday season. In a now-viral video, little Stori stole the show when she took the microphone from her principal and ...
The carbon button microphone (or sometimes just a button microphone), uses a capsule or button containing carbon granules pressed between two metal plates like the Berliner and Edison microphones. A voltage is applied across the metal plates, causing a small current to flow through the carbon.
Parabolic microphone used at an American college football game. A parabolic microphone is a microphone that uses a parabolic reflector to collect and focus sound waves onto a transducer, in much the same way that a parabolic antenna (e.g. satellite dish) does with radio waves. Though they lack high fidelity, parabolic microphones have great ...
News anchors are no stranger to the occasional hot-mic moment, but CNN’s Kyra Phillips was caught having an entire 90-second conversation during a 2006 speech by President George W. Bush marking ...
Block diagram of the signal-flow for a common feedback loop [1]: 118 . Audio feedback (also known as acoustic feedback, simply as feedback) is a positive feedback situation that may occur when an acoustic path exists between an audio output (for example, a loudspeaker) and its audio input (for example, a microphone or guitar pickup).