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A-100: 1959–1965 [14] Same tone-wheel generator as the B-3 / C-3 but with power amp and speakers built into the console, along with a separate Reverb amplifier and speaker. [15] C: 1939–1942 [16] Almost same as Model A-B but with church style cabinet. [16] CV: 1945–1949 [17] Based on Model C, Hammond Vibrato was added.
The SI unit of frequency is the hertz (Hz). It is the property of sound that most determines pitch. [1] The generally accepted standard hearing range for humans is 20 to 20,000 Hz. [2] [3] [4] In air at atmospheric pressure, these represent sound waves with wavelengths of 17 metres (56 ft) to 1.7 centimetres (0.67 in).
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.
It can generate a wide range of frequencies. For example, the Tektronix FG 502 (ca 1974) covers 0.1 Hz to 11 MHz. [5] Frequency stability of 0.1 percent per hour for analog generators [5] or 500 ppm for a digital generator. Maximum sinewave distortion of about 1% (accuracy of diode shaping network) for analog generators. [6]
95 dB @ 3,100 Hz tone are used in many current notification devices. [1] 80 dB @ 520 Hz tone are used in newer notification devices. [1] 70 dB to 100 dB weighted for human hearing (higher decibels, in the 100 to 115 dB range, were common with older electromechanical horns) [citation needed] Light (visible signals) 15 cd to 1,000 cd candela ...
The Fender Bassman was the first amplifier to standardize the tone stack design. Dubbed the 5F6-A from the Fender model number of the amp which first used it, this tone stack offered the performer the ability to control the amplifier's low, mid, and high frequency response independently.
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