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Noise control is an active or passive means of reducing sound emissions, often for personal comfort, environmental considerations, or legal compliance. 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 ...
A lawn mower (also known as a grass cutter or simply mower, also often spelled lawnmower) is a device utilizing one or more revolving blades (or a reel) to cut a grass surface to an even height. The height of the cut grass may be fixed by the design of the mower but generally is adjustable by the operator, typically by a single master lever or ...
Lawn mower racing. Lawnmower racing is a form of motorsport in which competitors race modified lawnmowers, usually of the ride-on [broken anchor] or self-propelled variety. The original mower engines are retained, but blades are removed for safety. The sport attracts all ages, and is usually entered into in a spirit of fun rather than extreme ...
Lawn-Boy. Lawn-Boy is a brand of lawn mower, originally manufactured by the Evinrude Company in 1934 and owned since 1989 by Toro. It was the first one-handed reel power mower [clarification needed] introduced to the American public. Evinrude purchased Johnson Motor Wheel Company from a New York stock brokerage firm a year later, and in 1936 ...
List of free analog and digital electronic circuit simulators, available for Windows, macOS, Linux, and comparing against UC Berkeley SPICE. The following table is split into two groups based on whether it has a graphical visual interface or not. The later requires a separate program to provide that feature, such as Qucs-S, [ 1] Oregano, [ 2 ...
The SN76477N was in a standard 0.6 in (15.24 mm) width dual in-line package (DIP). The SN76477NF was in a less common 0.4 inch (10.16 mm) width DIP. SN76477 top view. A redraw of a demonstration circuit used to try out most of the capabilities of the 76477 sound chip. The text below is intended to explain the use of the 76477 in the demo ...
LTspice is a SPICE -based analog electronic circuit simulator computer software, produced by semiconductor manufacturer Analog Devices (originally by Linear Technology ). [ 2] It is the most widely distributed and used SPICE software in the industry. [ 6] Though it is freeware, [ 4][ 5] LTspice is not artificially restricted to limit its ...
T and − T are the switching thresholds, and M and − M are the output voltage levels. In electronics, a Schmitt trigger is a comparator circuit with hysteresis implemented by applying positive feedback to the noninverting input of a comparator or differential amplifier. It is an active circuit which converts an analog input signal to a ...