passive or active filters !?

[alarassi]

hello everyone!
im new here and this's my first topic or let me say my first request for help  ;D

im doing a project on a compact heart sound monitoring system (phonocardiogram) that convert the signal and displays it on LCD , i want to use a bandpass filter with cut off  frequency of (10HZ  and 600HZ ) to attinuate the undersired frequencies!

i don't know which filter is better to be used either passive or active filters! i want the system to be simple since i want it to be as compact as possible!

thank you for ur help

 

[Hero999]

Active is better because it gives amplification and the output is low impedance.

You can download some software to help you design active filters.

 

[suhartoyo]

I'm newcomer's in electronics labs 
may be you can use the active filter than passive filter, complete the circuit with variable potentiometers to adjust the frequency that you want