Ongoing‎ > ‎

Coupling frequency 294 Hz

posted 17 Oct 2015, 00:42 by Peter Grankulla   [ updated 17 Oct 2015, 00:55 ]
I have done this many times, but it still surprises me how accurate it is. I new that the true M5 of the back plate was around 345-350 Hz, because of minor edge distortion. There is good margin to take it down once I have the top plate ready and know what I want to do. (download file below: Coupling_Soil2015_294Hz.mp3). 294Hz/329Hz(the other mode). Track these modes by holding it with your thumb at upper and lower end blocks and knocking in the middle of opposite lower and upper bout. 

Peter Grankulla,
17 Oct 2015, 00:42