Methods of Air Speaker Creation
Basic Methods of Modulation
Build a basic radio circuit and AM or FM modulate a high frequency signal that drives the plasma via a transformer
(typically a Tesla coil). Using an RF arc increases the stability and can lower the audible noise of the
Create a DC arc or corona and add the AC voltage signal onto it via a transformer.
Create a stable plasma arc but surround it with electromagnets that are modulated with the audio signal.
Basic Methods of Construction
Two planes of points, separated to form a corona with a grid in
between to modulate the ion stream, much like an electronic valve.
Point to plane
A sharp electrode pointing at a blunt electrode. The blunt electrode can be a dome or a mesh.
Point to air
A point in free air with a very high voltage applied. This can also have a grid surrounding the point electrode
which is then modulated (sometimes the grid is insulated from the plasma by a solid such as ceramic or quartz).
In all cases the grid can take the form:
A ring around each point
A mesh screen between the points
Wires between the points