Equaliser, or phase plug, for electro-acoustic transducers

摘要

Equaliser ( 4 ) or phase plug, for electro-acoustic transducers ( 1 ), having at least a central hole ( 40 ), and or a first series of openings ( 41 ), or slots, in the from of concentric rings, coaxial to an axis ( 4 a) of symmetry of the phase plug ( 4 ). Said phase plug is characterised in that it has at least a second series of radial slots ( 42 ) positioned externally to said hole ( 40 ) or to said first series of slots ( 41 ). In the phase plug ( 4 ) has a third series of radial slots ( 43 ) interposed between said first and second series ( 41;42 ).