Tension per cent PR

[Don]

Hi Baoli,

I think you mean 1.95% for each 4 cent change--call it 2% for 4 cents. (.48
x 4)

At 12:42 PM 12/21/2005 -0800, you wrote:
>Hi John,
>
>T (440): T (420) =1.0975, that means the tension
>raised by(about)9.75% after 20Hz pitch correction. We 
>divide 9.75% by 20Hz, we get 0.48% for each HZ--very
>close to 0.45%.
>
>For different note, such as A220, A880 or any notes on
>the keyboard, we can do a similar calculation and get
>the same results for each string. The whole tension
>for a piano is simply added up by each string's
>tension. So it is easy to conclude that the whole
>tension of a piano will increase 4.5% for each 4 cents
>pitch raise,if the piano is not originally way out of
>tune.
>Please correct me if I am wrong.
>Thanks!
>Baoli

Regards,
Don Rose, B.Mus., A.M.U.S., A.MUS., R.P.T.
Non calor sed umor est qui nobis incommodat

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