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Dolby noise-reduction system - Wikipedia
https://en.wikipedia.org/wiki/Dolby_noise-reduction_system
The first was Dolby A, a professional broadband noise reduction system for recording studios in 1965, but the best-known is Dolby B (introduced in 1968), a sliding band system for the consumer market, which helped make high fidelity practical on cassette tapes, which used a relatively noisy tape size and speed. It is common on high fidelity stereo tape players and recorders to the …
Dolby’s Noise Reduction System | National Museum of ...
https://americanhistory.si.edu/americas-listening/dolby%E2%80%99s-noise-reduction-system
In 1965 Ray Dolby invented electronic circuitry that removed unwanted noise by processing the audio signal. Recording studios quickly adopted Dolby’s system, and makers of cassette tape players soon followed. View object record. Dolby A301 prototype audio noise reduction unit.
Noise Reduction – Richard L Hess—Audio Tape Restoration ...
https://richardhess.com/notes/formats/magnetic-media/magnetic-tapes/analog-audio/noise-reduction/
Introduced in 1971. Dolby C—This was widely available as a built-in processor with cassette decks and also used in a few pro-sumer reel-to-reel multi-track tapes. Introduced in 1983. Dolby S—This was available as a built-in processor with cassette decks and also used in a few pro-sumer reel-to-reel multi-track tapes. Introduced in 1990
Stereo Gear in the 1970’s Was it The Audiophile Golden …
https://www.audioholics.com/editorials/70s-stereo-gear
One of the most significant audio milestones of the 1970’s was the appearance of the cassette tape player/recorder equipped with Dolby B noise reduction. Back in the days before portable audio was commonplace, the dominant playback formats were the vinyl LP and reel-to-reel tape.
Audio measurements and Dolby, dbx noise reduction
https://www.testandmeasurementtips.com/audio-measurements-and-dolby-dbx-noise-reduction-faq/
The Dolby Noise Reduction System is actually a succession of increasingly robust innovations, first introduced for use in audio recording tape by Dolby Laboratories is 1965. At that time, Dolby A emerged as a high-end professional broadband noise reduction system for recording studios.
Audio timeline | Yale University Library
https://web.library.yale.edu/cataloging/music/audiotimeline
Audio cassette: Analog; 1/8 in. tape width; 1 7/8 ips popular in the US through the 1990s: 1964: 8-track tape: Analog; 1/4 in. tape width; 3 3/4 ips in an endless loop cartridge: 1969: Microcassette: Analog: 1970 Dolby noise reduction introduced (cassettes) 1975: Betamax digital audio "Dolby Stereo" cinema surround sound: 1982: Compact disc
what came before cassette tapes - Publicaffairsworld.com
https://publicaffairsworld.com/what-came-before-cassette-tapes/
In 1968, a dashboard car radio with a built-in cassette tape player was introduced by Philips. In subsequent years, cassettes supplanted the 8-track and improved the technology, with longer play times, better tape quality, auto-reverse, and Dolby noise reduction. They were popular throughout the 1970s and 1980s. When was the first tape invented?
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