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Active noise control is sound reduction using a power source. Passive noise control is sound reduction by noise-isolating materials such as insulation, sound-absorbing tiles, or a muffler rather than a power source. Active noise cancelling is best suited for low frequencies.
The SN76489 [1] Digital Complex Sound Generator (DCSG) is a TTL-compatible programmable sound generator chip from Texas Instruments. [2] Its main application was the generation of music and sound effects in game consoles , arcade video games , and home computers ( TI-99/4A , BBC Micro , ColecoVision , IBM PCjr , Tomy Tutor , Master System ...
SN76477 "complex sound generator" is a sound chip produced by Texas Instruments (TI). The chip came to market in 1978, [1] and TI ceased production of the part. [when?] A compatible version is identified as ICS76477. [2] The chip is typically used as a sound effects generator in arcade games and toys and for hobby projects. The use of the ...
Simplified graphical depiction of active noise reduction. To cancel the lower-frequency portions of the noise, noise-cancelling headphones use active noise control or ANC.A microphone captures the targeted ambient sounds, and a small amplifier generates sound waves that are exactly out of phase with the undesired sounds.
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. [1]
The internal electronic circuitry of an active noise-canceling mic attempts to subtract noise signal from the primary microphone. The circuit may employ passive or active noise canceling techniques to filter out the noise, producing an output signal that has a lower noise floor and a higher signal-to-noise ratio .
In its Sept. 2023 complaint, the Justice Department accused eBay of illegally allowing the sale of more than 343,000 aftermarket "defeat" devices that help vehicles generate more power and get ...
Noise generator Sunsoft: Sunsoft 5B: 1992 3 Famicom cartridge Gimmick! Derivative of Yamaha YM2149F [28] Texas Instruments: SN76477: 1978 1 Space Invaders arcade system board, ABC 80 [29] LPC Speech Chips: 1978 1 Speak & Spell, Speak & Math, Speak & Read, arcade games
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