Fig. 6: Fabrication procedure and acoustic measurement setup for the tunable acoustic absorbers.
From: A tunable acoustic absorber using reconfigurable dielectric elastomer actuated petals
a Fabrication procedure of the multi-layered micro-slotted dielectric elastomer bending actuators (MSDEBAs). b Measurement setup for the normal incident absorption coefficient. c Measurement setup for the acoustic transmission loss. d Optical micrograph of the micro-slots formed by laser cutting.
