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Sparrowlegs Speaker Design description of an omnidirectional speaker including images of the initial build attempts -

Omnidirectional speakers use a method of dispersing sound energy in a 360 degree spray, allowing the sound energy to be uniform with its environment.

Unlike a conventional cone driver the reflections from the sidewalls will be identical to the signal that’s reaching you directly.

However their are many forms of omnidirectional setups, But my interested is the truest one of all. One which uses a spherical diaphragm that radiates sound vertically. By its design compared with the standard speaker, it changes the vectors of the frequency wave launch by 90 degrees.

The voice-coil is mounted at the bottom and when a signal is applied, it bends the segments, producing omnidirectional sound.