Needed: to cut out voices 

What Android Bluetooth does the job?

I can't dictate concentrated. Mic with earphonei s perfect

 

Hoping for constructive suggestions

Sorry, I'm not understanding what you want. Are you looking to cut out the noise around you so you can concentrate, OR are you looking to cut noise the mic receives.

Thanks for reply.

My question shows that I do not know if for a microphone surround noise is the same as vocal noises. I only need to cut out loud voices around me.

Search for one with active noise cancellation.