Omnidirectional Vs Unidirectional microphones

Omnidirectional devices broadcast or take in their signals from all directions. Someone who records sound effects and wants a general reading of a surrounding environment (like timber creaking, brooks babbling, and crickets chirping in a forest, for example) would find an omnidirectional microphone useful.


Unidirectional devices, on the other hand, are more focused on picking up or transmitting their signals in one direction. This is especially helpful if you’re in an area full of ambient sounds that you do not want. For example, if you were to interview an MP in a crowded event, then having an unidirectional microphone would be useful because then it can concentrate on only the MP’s voice and not the other background chatter or noise.
Source used: http://lockergnome.com/2011/08/30/omnidirectional-vs-unidirectional/

In my radio newscast, I will be using a unidirectional microphone as we will need it to capture only the sound of our interviewee/s and not the other background noise such as chatter.