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I am sending a 20Khz signal from my phone and capturing all the signals while doing exercise above it. Here I have a signal of a person doing "hand scissors exercise"

I am doing analysis on how many times has the person done the exercise. I am able to figure that out in the frequency domain. But, the time-domain signal is very noisy, is there any way to extract any information in the time-domain from the existing signal that I have ?

The FFT analysis of the signal is attached below : frequency domain of the signal

The raw signal in the time-domain is given below, is there anything that can be done on this :

(Y -axis is the energy of the signal) (X-axis is the number of frames in the wave signal)

Time domain of the raw signal

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  • $\begingroup$ You have not specified what signal you have captured, what does the y axis represent? $\endgroup$ – PAK-9 Nov 4 '16 at 16:57
  • $\begingroup$ Easy, just take the Full Width at Half Maximum with a windowed FFT and you are done.... Pass me the data and i could make an example to you. $\endgroup$ – Brethlosze Nov 4 '16 at 17:11
  • $\begingroup$ @PAK-9 : I will modify the question and update it. $\endgroup$ – Dinesh VG Nov 4 '16 at 22:16
  • $\begingroup$ @hypfco : Can you provide me with a mail address to send the signal ? $\endgroup$ – Dinesh VG Nov 4 '16 at 22:17

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