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Further research into crackling noise was done in the late 1940s by Charles Francis Richter and Beno Gutenberg who examined earthquakes analytically. Before the invention of the well-known Richter scale, the Mercalli intensity scale was used; this is a subjective measurement of how damaging an earthquake was to property, i.e. II would be small vibrations and objects moving, while XII would be ...
Computer speakers, or multimedia speakers, are speakers sold for use with computers, although usually capable of other audio uses, e.g. for an MP3 player. Most such speakers have an internal amplifier and consequently require a power source, which may be by a mains power supply often via an AC adapter , batteries, or a USB port.
Different types of noise are generated by different devices and different processes. Thermal noise is unavoidable at non-zero temperature (see fluctuation-dissipation theorem), while other types depend mostly on device type (such as shot noise, [1] [3] which needs a steep potential barrier) or manufacturing quality and semiconductor defects, such as conductance fluctuations, including 1/f noise.
Computer speakers range from a basic pair of speakers to 7.1 surround sound speakers with advanced features. The high-end surround sound speakers give the best sound for computer gaming but are rather expensive. The price ranges from $350.00 for a top of the line set to $4.99 for a set of rather cheap speakers.
MediaMate speakers (either side of a CD player) The computer speakers from Bose was the "MediaMate" system, which was released in 1987. The MediaMate included magnetic shielding so that they could be placed near a CRT computer monitor without causing the monitor's image to distort. They had dual inputs and two sources (such as a CD player and a ...
One of the company's earliest customers was Bud Hawkins, chief sound engineer for Walt Disney Studios, who bought eight HP 200B audio oscillators (at $71.50 each) to be used in the animated film Fantasia. HP's profit at the end of 1939, its first full year of business, was $1,563 (equivalent to $34,236 in 2023) on revenues of $5,369. [14]
A PC speaker is a loudspeaker built into some IBM PC compatible computers. The first IBM Personal Computer , model 5150 , employed a standard 2.25 inch magnetic driven (dynamic) speaker. [ 1 ] More recent computers use a tiny moving-iron or piezo speaker instead. [ 2 ]
The Digital Sound System 80, short DSS80, was a three-piece PC audio system co-developed by Microsoft and Philips.It debuted on the 1998 Electronic Entertainment Expo (E³) and is most likely the only speaker system ever released by the Microsoft Corporation.