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November 24th, 2002, 01:43 PM
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#1 |
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Regular Crew
Join Date: Jul 2002
Location: Portland, Oregon
Posts: 103
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recording human heart beat
Has anyone captured audio of a human heart beat? Any suggestions on how to do this? [Hint: A standard vocal mic, amped to maximum is not a good method.]
Thanks for any advice! R.Johnson Portland, OR |
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November 24th, 2002, 01:54 PM
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#2 |
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Warden
Join Date: Mar 2002
Location: Clearwater, FL
Posts: 8,287
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I did a whole production for training nurses several years ago. We used a stethoscope and a wired lav. The sound man worked it out through trial and error. He put the earpieces right up to the lav. and wrapped foam rubber loosely around it. The sounds were great and the client loved them. It was like the heart was right there. But as I recall the stethoscope we used ran around $100 or more.
Jeff |
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November 24th, 2002, 02:20 PM
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#3 |
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Regular Crew
Join Date: Jul 2002
Location: Portland, Oregon
Posts: 103
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Sounds about right - I was considering the stethoscope approach.
Thank you, Ron Johnson Portland, OR |
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November 24th, 2002, 05:39 PM
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#4 |
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Retired DV Info Net Almunus
Join Date: Sep 2001
Location: Austin, TX USA
Posts: 2,882
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Don't know if you want to use other recordings...but I found several at http://www.findsounds.com/
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November 24th, 2002, 07:31 PM
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#5 |
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Major Player
Join Date: Nov 2001
Location: Boston, MA
Posts: 280
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i actually did this not too long ago...i built a contact microphone from a piezo element, and secured it to my chest...got a good recording that way
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Casey Visco Glidecam Industries, Inc. |
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November 25th, 2002, 07:15 AM
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#6 |
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Regular Crew
Join Date: Aug 2002
Location: Scotland UK
Posts: 63
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If you are filming in a hospital ask to borrow a pocket doppler. This will give you a lovely whoosh, whoosh of the blood pumping through the heart rather than the usual thump, thump from a stethescope (love those technical terms!).
The doppler outputs to a speaker so any mic should pick it up. A full sized doppler will record onto tape so you could get access to the audio in/outs depending on the type of recording system used. Regards Ross |
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November 25th, 2002, 10:02 PM
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#7 |
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Regular Crew
Join Date: Jul 2002
Location: Portland, Oregon
Posts: 103
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great suggestions!
Thanks to everyone - these have all been great suggestions.
I am curious where the piezo element was purchased? How does one specify such things? Thanks again, Ron Johnson Portland, OR |
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November 26th, 2002, 12:51 PM
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#8 |
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Major Player
Join Date: Nov 2001
Location: Boston, MA
Posts: 280
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the piezos i got from All Electronics (www.allelectronics.com)...you can also get them at a radio shack or something comparable...
c
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Casey Visco Glidecam Industries, Inc. |
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