Hi Miguel,
Thanks for your reply.
Sorry for the typo on the array naming. It should be broadside array.
We are in the concept of implementing the beamforming in car audio whereby the mic(hansfree) would pick up the end user voice as well as background noise(wind noise, engine noise and etc..) and then to cancel out those noise.
You are right, it is a fixed beam but the main voice would probably from driver seat/passenger seat which is around 45 degree or around 135 degree.
Hopefully you get what I mean. Thanks so much for you great sharing and help.