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A tuning fork is an acoustic resonator in the form of a two-pronged fork with the prongs formed from a U-shaped bar of elastic metal (usually steel). It resonates at a specific constant pitch when set vibrating by striking it against a surface or with an object, and emits a pure musical tone once the high overtones fade out.
Over time, tuning forks were adapted for use in medical and therapeutic settings, where their precise frequencies have been harnessed for healing and therapeutic purposes. [ 3 ] Tuning forks are known for their nearly pure frequency response, emitting a clear, unwavering tone that is free from the complex overtones found in other instruments.
The vibration of the probe tends to eliminate build-up of material on the probe element. Vibrating level sensors are not affected by dust, static charge build-up from dielectric powders, or changes in conductivity, temperature, pressure, humidity or moisture content. Tuning-fork style vibration sensors are another alternative.
1711: The Tuning fork invented by John Shore (c. 1662–1752). 1798: The harp lute invented by Edward Light (c. 1747-c. 1832); Light patented the instrument in 1816. [114] Early 19th century: The Irish flute is not an instrument indigenous to Ireland; a key figure in its development was English inventor and flautist Charles Nicholson (1775–1810).
This was made from woven steel wires and very thin (1 ⁄ 1000 inch (0.025 mm) thickness) stainless steel ribbons, doped with PVC or other plastic, specially designed to avoid ballooning. To properly fit the skin to the frame, a tuning fork had to be used. There was only room in the cockpit for the single pilot.
A man tuning an upright piano. Piano tuning is the process of adjusting the tension of the strings of an acoustic piano so that the musical intervals between strings are in tune. The meaning of the term 'in tune', in the context of piano tuning, is not simply a particular fixed set of pitches. Fine piano tuning requires an assessment of the ...
High quality watches were produced by firms such as Patek Philippe, an example being a Patek Philippe ref. 1518, introduced in 1941, possibly the most complicated wristwatch ever made in stainless steel, which fetched a world record price in 2016 when it was sold at auction for $11,136,642. [196] [197] [198]
"Stainless steel, Making motorbikes, Making paper" 31 January 2011 () TBA: 8 "Blast Through Rock, Map Earth, Provide Flowers Year-Round" 7 February 2011 () TBA: 9 "Large aquarium, Making sapphire, Bentlys" 14 February 2011 () TBA: 10 "Satellites, Ship Maintenance, Making stretched limos" 21 February 2011 () TBA: 11
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