Wanting a Sound Sensor with Noice Cancellation (Explained below)...

Wanted a sound sensor that will accepted multiple voices of people that should not work in the save and check format .
So please let me know if any sensor is available with you and kindly share the link at shubhambhandari008@gmal.com
Thank you.

How do you imagine that a sensor can "know" which sounds are noise, and which are voices?

jremington:
How do you imagine that a sensor can "know" which sounds are noise, and which are voices?

They do it on TV, so it's obviously going to be possible in real life with just Arduino.

It’s commonly used in mobile phones to filter out background noise.
Not sure how it works, really. Probably to do with frequencies and overall volume (the voice that is talking in the microphone is usually a lot louder than the background).