Electro-Biomedical Solutions

   Joey Segovia                        Yasser Murga                     Ben Graniello                Derrick Walker



PDA-based Phonocardiogram-Electrocardiogram


The project at hand deals with phonocardiography, the listening to and recording of heart sounds, and electrocardiography, the recording of electric signals from the heart. Due to the lack of a device that would wirelessly transmit the sound and signal representation of those produced by the heart, as well as have portability, it was crucial to develop a system that could perform these specific tasks.  This is where the PDA-based phonocardiogram-electrocardiogram comes into play.   Developing a portable, low cost device that would not only read the sounds and electric signals of the heart, but would also wirelessly transmit the signals to a PDA and represent them together in the time and frequency domain.


Phonocardiography is the listening and recording of the heart sounds and electrocardiography is the recording of electric signals from the heart. While electrocardiography is a very commonly used technique, phonocardiography is not very common at all. With an instrument that performs phonocardiography a doctor or medical assistant can not only hear the heart but also see the signal in the time and frequency domains. There are a limited number of devices that do this in the medical field. Since the phonocardiograph technique is uncommonly used it is not accurately known how similar the phonocardiograph signal is to the electrocardiograph signal. The ability to show both the phonocardiograph signal and the electrocardiograph signal together in the same display could lead to some undiscovered medical advances. This is what EBS's project is going to do, it will not only allow doctors to hear and see the patients heart but it will allow a comparison of the electric signals of the heart and the acoustic sounds of the heart. Another advancement that will be incorporated into this project is the signals will be wirelessly transmitted to a nearby PDA, where they will be displayed, for incredible convenience.

Method of Completion

This project will be completed using a combination of software and hardware. The software end of this project involves an advanced level of signal analysis which requires a powerful tool. LabVIEW 7.0 PDA module will be used to accomplish this section of the project. Two different types of sensors will be used in order to pick up the two different signals, electric and acoustic. The signals from the sensors will be sent to a separate filter-amplifier combo. Using a microcontroller and a wireless transmitter the data will be transferred to the nearby PDA while still holding the signals' integrity. This data will be displayed in a graphical user interface that will be produced using LabVIEW as well. The project is divided up upon four outstanding electrical engineer students to ensure that the project is complete by the due date.


The main issue encountered in this project concerns the way to transfer the data wirelessly. This is a concern because we need to transfer very important signals at a fast rate. The signals are vital signs therefore they have to be exactly the same when received as when they were transmitted.


No schematics have been developed yet!



Project is in progress right now!




EBS would like to thank the following people for making the project possible

Homer Nazeran

Mr. Robert Rubio

Mr. Tony Woo

Franz Kuhlmann

Texas Instruments