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Infrasound arrays at monitoring station in Qaanaaq, Greenland. Infrasound , sometimes referred to as low frequency sound or subsonic , describes sound waves with a frequency below the lower limit of human audibility (generally 20 Hz , as defined by the ANSI/ASA S1.1-2013 standard). [ 1 ]
Founded by Robert Kern in 1959, the company soon began producing portable generators for Sears, Roebuck and Co. under the Craftsman brand. During the 1970s, Generac expanded its offerings in the portable and recreational vehicle markets, and in the 1980s the company entered the commercial and industrial markets with its backup power generation systems.
Future improvements on the size of the device could make it an ideal power source for medically implanted devices such as pacemakers. According to the team that created the device, the vibrations from the heart muscles would be enough to allow the generator to power a pacemaker. [2] This would eliminate the need to replace the batteries surgically.
The company sells Baldor-Reliance and ABB branded industrial electric motors. Products are available in both IEC and NEMA configurations and range from fractional to 100,000 horsepower. The company also sells the Dodge brand of mechanical power transmission products, including mounted bearings, enclosed gearing, couplings, sheaves, and bushings.
The Brush HMA manufacturing plant is located adjacent to the river, north of Ridderkerk, near Rotterdam in the Netherlands.. The Brush HMA plant at Ridderkerk, not to be confused with the other Holec Ridderkerk enterprise that became part of France's Alstom, has manufactured many different types of electrical machines and associated equipment over the last one hundred twenty years.
A long-range acoustic device (LRAD), acoustic hailing device (AHD) or sound cannon is a specialized loudspeaker that produces sound at high power for communicating at a distance. It has been used as a method of crowd control , which has caused permanent hearing damage , having an extremely high decibel capacity (up to 160 dB measured at one ...
Power Machines company was established in the year 2000. Today it is a joint venture combining technological, industrial and intellectual resources of six world-famous Russian enterprises: Leningradsky Metallichesky zavod (established in 1857), Electrosila (1898), Turbine Blades’ Plant (1964), Kaluga Turbine Works (1946), Reostat Plant (1960) and Energomachexport (1966).
Sound reinforcement in a large format system typically involves a signal path that starts with the signal inputs, which may be instrument pickups (on an electric guitar or electric bass) or a microphone that a vocalist is singing into or a microphone placed in front of an instrument or guitar amplifier.
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