Shock wave source comprises has elastically compressible interlayer located between membrane and propagation medium and may consist of fibrous material with fibers orientated perpendicularly to direction of movement of membrane

摘要

The shock wave source comprises an excitation coil and deflectable membrane to impart a pressure pulse on a propagation medium. An elastically compressible interlayer(6) is located between the membrane(5) and propagation medium(8). The interlayer consists of a fibrous material with the fibers orientated perpendicularly to the direction of movement of the membrane. The interlayer may consist of a homogenous material interspersed by cavities.