Sound device with an acoustic waveguide

摘要

The sound mechanism has an acoustic generator (22) and an acoustic guide (26) with an input connected to the acoustic generator and output (11) with a shape for propagation. The waveguide has two conduit sections (16,18) having a lengthened output section and a lengthened input section. There is a conical shaped reflection surface (14) with the input defined on the focus of the reflecting section.