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Modified 2/2018
Page TTT_30
..Construction Details of Tap Tone Wood Reference Tool....
..This is the side profile of the vertical bar glued on the sounding board:
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22 3/16" long X 0.225" wide
0.30" high
this end.
0.60" high
this end.
0.510" high
here
0.420" high
here
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3"
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20"
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0.225" wide
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Approximate expected depth of vertical bar at different frequencies: ( Bar with straight sides.) :

162 HZ ( 0.389 /0.447")
176 HZ (0.414/ 0.488")
198 HZ (0.453/ 0.576")
213 HZ (0.467"
242 HZ (0.507"
287 HZ (0.532"
324 HZ (0.560"
396 HZ (0.577"
...Your tool will be slightly different... just tune to calibration reference sound file on previous page.






..This is my current favorite 'tapper" tool :
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..6 " long and 0.3" by 0.4" cross section, made of split spruce wood with 213 wood tone and # 22 rub tone.