Hello,
"please allow me to introduce myself"
I am using audicity to identify the resonance frequency (RF) of table tennis blades. The speed of a blade corresponds to its RF: the lower/greater the RF the lower/greater the speed. For the RF determination I hold the blade at its grip and let a ball bounce from about 10 cm height. The noise is recorded by a microphone and audicity. After the measurement I select one of the sound peaks generated by the ball touching the blade and use the function "frequence analysis" to pick up the largest peak and read the indicated frequency.
However this is ony semiquantitativ. But an absolute speed parameter could be calculated from the recorded track. What does fast or slow blade mean ? If you drop the ball from 10 cm on a low speed blade it will come up only x cm and the time intervall before the second contact will be only y sec. With a faster blade it would be x+ (delta)x cm and y + (delta)y sec. Unfortunately it would create quite an effort to exactly reproduce the 10 cm (or whatever) height for different measurements.
So I need something independent form the parameter "initial height". This can be elaborated by measuring the speed of decrease of x respectively y between the bouncings i.e I need the time intervall between two spikes plotted vs time.
Unfortunately I have no idea about programming. Is somebody able and willing to help ?
Thanks
Peter