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In telecommunication, a standard test tone is a pure tone with a standardized level generally used for level alignment of single links and of links in tandem. [1]For standardized test signal levels and frequencies, see MIL-STD-188-100 for United States Department of Defense (DOD) use, and the Code of Federal Regulations Title 47, part 68 for other Government agencies.
A programmable sound generator (PSG) is a sound chip that generates (or synthesizes) audio wave signals built from one or more basic waveforms, and often some kind of noise. PSGs use a relatively simple method of creating sound compared to other methods such as frequency modulation synthesis or pulse-code modulation .
For example, if a 530 Hz pure tone is presented to a subject's right ear, while a 520 Hz pure tone is presented to the subject's left ear, the listener will hear beating at a rate of 10 Hz, just as if the two tones were presented monaurally, but the beating will have an element of lateral motion as well.
For program sounds applied to the Sensurround Horns, the composite mono soundtrack was used, with its volume and timing regulated by the 25 Hz control tone. 70mm 6-Track Magnetic Stereo: The Sensurround Control Tones were recorded on Tracks 2 and 4 and are 100 Hz instead of 25 Hz and 35 Hz. This was because the magnetic system could not ...
A resistor at a certain temperature has a thermal noise associated with it. A noise generator might have two resistors at different temperatures and switch between the two resistors. The resulting output power is low. (For a 1 kΩ resistor at room temperature and a 10 kHz bandwidth, the RMS noise voltage is 400 nV. [3])
60 Hz: Electromagnetic – standard AC mains power (American AC, Osaka AC), refresh rate of NTSC CRT televisions and standard refresh rate of computer monitors: 10 2: 100 Hz 100 Hz: Cyclic rate of a typical automobile engine at redline (equivalent to 6000 rpm) 261.626 Hz: Acoustic – the musical note middle C (C 4) 440 Hz
100 Hz (10 ms resolution) 1 kHz (1 ms resolution) 10 kHz (100 μs resolution) 100 kHz (10 μs resolution) 1 MHz (1 μs resolution) Coded expressions Binary-coded decimal (BCD) day of year, hours, minutes, and (for some formats) seconds and fractions are always included. Optional components are: Year number (00–99; century is not coded)
This page was last edited on 1 October 2011, at 16:14 (UTC).; Text is available under the Creative Commons Attribution-ShareAlike 4.0 License; additional terms may ...
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