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[14] [15] Sound mirrors normally work by using moveable microphones to find the angle that maximizes the amplitude of sound received, which is also the bearing angle to the target. Two sound mirrors at different positions will generate two different bearings, which allows the use of triangulation to determine a sound source's position.
Example of microphone positioning in a Decca Tree setup. A Decca Tree setup uses three omnidirectional microphones arranged in a "T" pattern outlining a triangle, often equilateral; the center microphone is mixed with the two spaced microphones to fill the "hole in the middle" in their imaging; it points the sound source.
By using the difference of arrival times of a sound at the two microphones, one can mathematically estimate the direction of the sound source. However, the accuracy with which an array of microphones can localize a sound (using Interaural time difference) is fundamentally limited by the physical size of the array. If the array is too small ...
A microphone stand. A microphone stand is a free-standing mount for a microphone. It allows the microphone to be positioned in the studio, on stage or on location without requiring a person to hold it. The most basic microphone stand is a straight stand.
A parabolic microphone used to capture sounds on the field during a football game. Parabolic microphones are used to capture sounds on the field during football games. The parabolic dish has been compared metaphorically to a telephoto lens, in the way that it can focus the capture of sound. [12]
This means the microphone must be positioned precisely equidistant from the two speakers if 'comb-filter' effects (alternate peaks and dips in the measured room response at that point) are to be avoided. Positioning is best done by moving the mic from side to side for maximum response on a 1 kHz tone, then a 3 kHz tone, then a 10 kHz tone.
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With this technique is the angle between the microphone axes α = ± 55° = 110° and the distance between the cardioid microphones (microphone basis) is in this case a = 17 cm and gives a total recording angle of 96°. The choice between one and the other depends on the recording angle of the microphone system and not on the distance to and ...