False contacts in TA

[Wim Libaers]

Originally Posted by Pishky

Thanks for your answer LUftWolf

My 'picture' of a TA is a series of cylindrical microphones arranged like beads on a string. The first and last one are separated by a large distance and should therefore be able to triangulate the contact. The computer should be able to take out the false contact. I guess this just goes to show my ignorance on the subject.

Once again many thanks for your reply, it is much appreciated.

Well, yes, but that sensor geometry doesn't allow you to determine an exact direction, it only gives you an angle between the array direction and the direction the sound comes from. This means the target could be anywhere on a cone with the apex on the array. If you assume the target is not above or below you, but to the sides, intersecting that cone with the horizontal plane gives you two bearings.