Digital stethoscope to identify disk vibrations

[terminator2]

Ordinary Doctors stethoscope can amplify faint sound coming from disk but is there any device which will pick up vibrations /sound and create digital graph so that we will instantly identify what is happening inside.
Has anyone done any expriements ? More advanced version of this tool mau measure RPM like slow spin /full spin etc.

[eaxi]

maybe you will find it interesting:
http://www.hddoracle.com/viewtopic.php? ... 340#p17290
audio file attached in original text

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[terminator2]

Hi eaxi
You have done great research
Thanks for the information. How have you converted faint audio in digital format ?

[carrge]

I have used my wife's digital stethoscope on a number of drives and it seems to work rather well. The one she has is Duo ECG + Digital Stethoscope (pairs with IOS and Andriod). The app is cool and produces some nice graphs. She bought it because of the sound amplification. Works well in a noisy hospital. Works well on HDD too.

[terminator2]

This might solve the purpose with great accuracy ,unfortunately it is too costly ($350 )