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The control signal is a square wave operating at 25 kHz, with the duty cycle determining the fan speed. 25 kHz is used to raise the sound of the signal above the range of human hearing; use of a lower frequency could produce an audible hum or whine. Typically a fan can be driven between about 30% and 100% of the rated fan speed, using a signal ...
Fans attached to components are usually used in combination with a heat sink to increase the area of heated surface in contact with the air, thereby improving the efficiency of cooling. Fan control is not always an automatic process. A computer's BIOS can control the speed of the built-in fan system for the computer. A user can even supplement ...
Antec pioneered a number of innovations in the PC case industry, including the switch from beige to black exterior color, and first cases specifically designed for noise reduction with the Sonata and P180. [3] In 2011, Antec was purchased by Ming-Jong Technologies Ltd. of Taiwan, and the combined company adopted the Antec name. [3]
Thunder Board. The Thunder Board was an 8-bit mono personal computer integrated circuit sound card from Media Vision, that had Sound Blaster compatibility at a reduced price. . It was widely advertised as “proudly made in the USA”; possibly a reference to the Sound Blaster, manufactured by the competing Singapore-based Creative Technologi
An RGB LED projecting red, green, and blue onto a surface Mixing red, green, and blue sources to produce white light needs electronic circuits to control the blending of the colors. Since LEDs have slightly different emission patterns, the color balance may change depending on the angle of view, even if the RGB sources are in a single package ...
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 canceling is best suited for low frequencies.
A tone control circuit is an electronic circuit that consists of a network of filters which modify the signal before it is fed to speakers, headphones or recording devices by way of an amplifier. Tone controls are found on many sound systems: radios , portable music players , boomboxes , public address systems , and musical instrument amplifiers .
In 1984, Gulton Industries, Inc., purchased the Altec Sound Products Division from the Altec Lansing Corporation, which was operating under Chapter 11 of the U.S. Bankruptcy Code. Included with the purchase were the tooling, parts and product inventories, distributor network, designs, patents, and assets of the Sound Products Division of Altec ...