Measuring Sustain and Power: was The Steinway Bell Patent

[Don]

Hi Mike,

The problem is duplicating the results. Our "tools" such as they are are
not very sophisticated. How long should one wait before striking the note a
2nd time? 30 mins? Just to make sure there is no residual vibration at some
level? The test blow device is not consistant enough. Perhaps one of the
electronic players??? 

At 12:26 PM 9/17/02 -0500, you wrote:
>Dave,
>
>I've never done this, nor heard of anyone else, but it occurs to me that
some combination of a calibrated hammer blow (maybe the tuning stability
test blow of 8 oz. dropped from 6 inches?), and one of the ETD's that
measure volume and sustain, such as RCT's Pianolizer or TuneLab, might
work.  Anyone ever do this?
>
>Mike
>
>----- Original Message ----- 
>From: David Love <davidlovepianos@earthlink.net>
>To: Pianotech <pianotech@ptg.org>
>Sent: Tuesday, September 17, 2002 9:05 AM
>Subject: Measuring Sustain and Power: was The Steinway Bell Patent
>
>
>Do we have a way of accurately quantifying sustain and power?  It would be
very helpful for before and after comparisons.
>
>David Love
>  Measure in what ways one could before and after the change relavant
parameters of sustain and power. 
>
>  -- 
>  Richard Brekne 
>  RPT, N.P.T.F. 
>  UiB, Bergen, Norway 
>  mailto:rbrekne@broadpark.no 
>  http://home.broadpark.no/~rbrekne/ricmain.html 
>    
>
>
>
>_______________________________________________
>pianotech list info: https://www.moypiano.com/resources/#archives
>
>

Regards,
Don Rose, B.Mus., A.M.U.S., A.MUS., R.M.T., R.P.T.

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