And also it explains the relations between the system of the motive power and sound producing organs, resonator and speech organs from acoustic point of view.

You'll need a system with the capability of processing sound input, preferably from an integrated microphone, although any sound source capable of producing discrete tonal events will suffice.

The plastic horns became a hallmarkof the World Cup in South Africa, producing a monotonous droning sound which provided a backdropfor every match.