BROADBAND ELECTRO-ACOUSTIC TRANSFORMER Russian patent published in 2007 - IPC H04R17/00 

FIELD: ultrasound engineering.

SUBSTANCE: broadband electro-acoustic transformer contains active element, working side of which has rigid connection with passive cover plate, connected to damper, additional dampers are connected to passive cover plate and to back side of active element. As additional dampers, reactive dampers may be used, made of material, acoustic resistance of which is less than acoustic resistance of active element. Reactive dampers are made of viscous-elastic material with possible change of their lengths. Active dampers may be used in electro-acoustic transformer.

EFFECT: expanded pass band of electro-acoustic transformer with possible change of its value.

5 cl, 3 dwg