Choosing the suitable OP-amp is one of the most crucial part in this project. Since the sound of the heart is not audible directly to human ear, so we need to amplify the sound so it is suitable and capable to be heard by human ear. Specific operational amplifier is going to be used so that the sound is amplified with the desire amount.
The integrated circuit (IC) that was chosen as the operational amplifier was TL072CN,
it is a low noise amplifier, since the heart sound is in low noise range which is only 1 - 1.67 Hz.
Choosing TL072CN as the OP-amp it has low harmonic distortion and low noise making this IC an ideally suited for high-fidelity and audio specifically in amplifying the heart sound that is in low frequency.
In order to make it audible this project is made so that it will help in amplifying the sound. Most importantly is this electronic part.
it is a low noise amplifier, since the heart sound is in low noise range which is only 1 - 1.67 Hz.
Choosing TL072CN as the OP-amp it has low harmonic distortion and low noise making this IC an ideally suited for high-fidelity and audio specifically in amplifying the heart sound that is in low frequency.
In order to make it audible this project is made so that it will help in amplifying the sound. Most importantly is this electronic part.
Figure 1: The pinout label of the IC of TL072CN
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