It’s somewhat amazing how these rather inexpensive electronics can augment the functionality of a common stethoscope. This digital stethoscope is using audio processing to add the features. A standard chest piece feeds a condenser microphone which is fed through a pretty standard OpAmp circuit which supplies the ADC of an ATmega644. After being digitized, the heart sound can be recorded in ten second increments to a 1 Mb flash memory chip. The data can also be fed to MATLAB via a USB cable in real-time. There it is displayed as a waveform and the heart rate is calculated on the fly. Check out the video after the break for a great demo of the system.
The picture above shows a set of ear buds used as output. But this is a standard headphone jack, so the heart sounds can be played on speakers which we think would come in handy for teaching purposes. There’s also the option to hook it to a computer input which could be the audio used for a Skype session if a doctor is not close at hand. There is lots of potential here at a fairly low cost and we love that!
http://www.youtube.com/watch?v=i_iY8ARsrvQ
The TSA also loves them!
The airport security must love this one 😛
yikes! ESD!
Argh, had to listen to 3 minutes of bs before they actually let us hear it in action. It’s useless, sound quality is very poor.
Believe it or not I rarely crack out my stethoscope to calculate someone’s heart rate. In fact apart from slow normal fast heart rate is not particular important.
Looks fancy though.
What I did see that is interesting is a stethoscope which let you shift the sounds heart moving infra, and ultra sound into the audible spectrum.
Sweet! I think you guys should go into business! Love the Rx logo on the carry-case 🙂
So it analyser heart sounds? I thought someone woul dhave noticeds that in the title.