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Free field reciprocity calibration (to give the free-field response, as opposed to the pressure response of the microphone) follows the same principles and roughly the same method as pressure reciprocity calibration, but in practice is much more difficult to implement. As such it is more usual to perform reciprocity calibration in an acoustical ...
The Harvard sentences, or Harvard lines, [1] is a collection of 720 sample phrases, divided into lists of 10, used for standardized testing of Voice over IP, cellular, and other telephone systems.
The first channel of audio undergoing analysis is connected directly from one of the main outputs of the mixing console and the second channel is connected to a microphone placed in the audience listening area, usually an omnidirectional test microphone with a flat, neutral pickup characteristic. The direct mixing console audio output is ...
A new type of laser microphone is a device that uses a laser beam and smoke or vapor to detect sound vibrations in free air. On August 25, 2009, U.S. patent 7,580,533 issued for a Particulate Flow Detection Microphone based on a laser-photocell pair with a moving stream of smoke or vapor in the laser beam's path.
Real ear measurement is the measurement of sound pressure level in a patient's ear canal developed when a hearing aid is worn. It is measured with the use of a silicone probe tube inserted in the canal connected to a microphone outside the ear and is done to verify that the hearing aid is providing suitable amplification for a patient's hearing loss. [2]
Enjoy a classic game of Hearts and watch out for the Queen of Spades!
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In the early 1950s, Mike Nichols wrote the following announcer test for radio station WFMT in Chicago. The WFMT announcer's lot is not a happy one. In addition to uttering the sibilant, mellifluous cadences of such cacophonous sounds as Hans Schmidt-Isserstedt, Carl Schuricht, Nicanor Zabaleta, Hans Knappertsbusch and the Hammerklavier Sonata, he must thread his vocal way through the ...