File:Heartbeat-thumb-transparancy.png
Heartbeat-thumb-transparancy.png (630 × 159 pixels, file size: 3 KB, MIME type: image/png)
Captions
Captions
Recording of heartbeat through measure of the transparancy of the thumb.
The scale on top is in seconds.
This is my own heartbeat, and my own recording, using open source program Audacity.
I took a 6V, 3W light bulb (used in bicycles) on the top side of my thumb (on my nail), and a infrared sensordiode on the other side of my thumb. The infrared diode was connected to the microphone input of a mp3-stick. The microphone input supplied the voltage (as if it was a elektret microphone). The recording was read into Audacity, and the signal was enlarged en filtered with a low-pass filter at 3Hz (twice).
Public domain.
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I, the copyright holder of this work, release this work into the public domain. This applies worldwide. In some countries this may not be legally possible; if so: I grant anyone the right to use this work for any purpose, without any conditions, unless such conditions are required by law. |
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 00:58, 18 January 2005 | | 630 × 159 (3 KB) | Dub (talk | contribs) | Recording of heartbeat through measure of the transparancy of the thumb. Own heartbeat, own recording, using open source program Audacity. Scale on top is in seconds. Public domain. {{PD}} |
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