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To maximize gain before feedback, the amount of sound energy that is fed back to the microphones must be reduced as much as is practical.As sound pressure falls off with 1/r with respect to the distance r in free space, or up to a distance known as reverberation distance in closed spaces (and the energy density with 1/r²), it is important to keep the microphones at a large enough distance ...
Microphone signals are often too weak to be transmitted to units such as mixing consoles and recording devices with adequate quality. Preamplifiers increase a microphone signal to line level (i.e. the level of signal strength required by such devices) by providing stable gain while preventing induced noise that would otherwise distort the ...
PC Guide color lime green. Line outputs usually present a source impedance of from 100 to 600 ohms. The voltage can reach 2 volts peak-to-peak with levels referenced to −10 dBV (300 mV) at 10 kΩ. The frequency response of most modern equipment is advertised as at least 20 Hz to 20 kHz, which corresponds to the range of human hearing. Line ...
This means that (1) moving the microphone closer to the sound source increases the signal level produced by the microphone, and (2) moving the microphone further away from undesirable noise sources will diminish the amount of noise in the microphone signal. Microphone placement is therefore an important aspect of gain staging [citation needed].
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A prototype speech recognition Aero Wizard in Windows Vista (then known as "Longhorn") build 4093.. At WinHEC 2002 Microsoft announced that Windows Vista (codenamed "Longhorn") would include advances in speech recognition and in features such as microphone array support [8] as part of an effort to "provide a consistent quality audio infrastructure for natural (continuous) speech recognition ...
A high shelf, such as a treble control, adjusts the gain of higher frequencies only. These are broad adjustments designed more to increase the listener's satisfaction than to provide actual equalization in the strict sense of the term. A parametric equalizer has one or more sections each of which implements a second-order filter function.
Automixers balance multiple sound sources based on each source's level, quickly and dramatically adjusting the various signal levels automatically. [2] Automixers are used in live sound reinforcement to maintain a steady limit on the overall signal level of the microphones; if a public address system is set up so that one microphone will not feed back, then, in general, the automixer will ...