hear others conversation via bluetooth is it possible

no , it wasn`t possibile.

There's a quite amazing application that runs on Linux-based platforms named "carwhisperer" for this (and other) purposes.

anyhthings possible if you have the right cash......anything....ask the security services what they use...as they do the same thing from over 100 mtrs.....but using a symbian phone to do it....no it is not possible

unless both parties agrree and establishes connection some software might releashed...as of none exist so thread closed