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.
Public domainPublic domainfalsefalse
Selle teose autoriõiguste valdajana annan selle teose avalikku omandisse. See kehtib üleilmselt. Kui see pole mõnes riigis õiguslikult võimalik: Annan kõigile õiguse seda teost kasutada ükskõik mille jaoks, ilma ühegi tingimuseta, kui seadus neid just ei sea.
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}}