In general, for both fork and string, colder = sharper. -----Original Message----- From: pianotech-bounces@ptg.org [mailto:pianotech-bounces@ptg.org]On Behalf Of Conrad Hoffsommer Sent: Thursday, March 31, 2005 2:25 AM To: Pianotech Subject: Re: Temp and Pitch At 22:45 3/30/2005, you wrote: >Gretings, > > When your tuning fork is 98.6 from keeing it in your pocket, is > it higher or lower in pitch than if you had kept it in the car on a > winter night, overnight? >Is a piano higher or lower in pitch when it is cooler? I was told the >answers for these questions, but I cannot remember. > >Thanks in advance, >Julia >Reading, PA Julia, The metal of the pitchfork expands with higher temperature. (within range of temp we're discussing) An expanded fork is longer. A longer fork is flatter. i.e. - for a fork, pitch varies inversely with temperature. If you leave a piano in the car overnight, you need a large car. Since all pianos are not equal, different materials in plate/strings/case and throw in a time factor - it's hard to anticipate. Plate/case shrinking would tend (eventually) to slacken (flatten) strings, while shrinking strings would (initially) tend to go sharp. Ya pays yore money an takes yore cherce. ;-} Conrad Hoffsommer You have the right to remain silent. Anything you say will be misquoted, then used against you. _______________________________________________ pianotech list info: https://www.moypiano.com/resources/#archives
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