The text of Self tuning

Richard Moody remoody@midstatesd.net
Thu, 5 Dec 2002 20:38:18 -0600


 Science - Reuters

Self-Tuning Piano Set to Make Sweet Music
Wed Dec 4, 2:24 PM ET  Add Science - Reuters to My Yahoo!



LONDON (Reuters) - An inventor has developed a piano that can tune
itself in 40 seconds.



Conventionally, pianos are tuned by manually adjusting the tension
of the strings struck when a piano key is pressed.


But Don Gilmore's invention warms the strings using an electric
current to reduce an excess of tension deliberately built in when
the piano leaves the factory.


"Gilmore's system will go on sale in some grand pianos made by
American piano maker Story and Clark by the end of next year," New
Scientist magazine said Wednesday.


"The system ... tunes the piano using a warming current to ease
the tension of the strings," the magazine explained.


A frequency analyzer, microcomputer and power transistor are
incorporated into the system to tune the string to the correct
frequency.


Gilmore, who is based in Kansas City, Missouri, trained as a
classical pianist before becoming a mechanical engineer and
inventor.


The company planning to use the invention in their pianos said it
was too early to say exactly how much it would add to the price of
their instruments.










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