Patent ID: 8995231
Filing Date: 2015-03-31
Classification: G01V,G10K

Abstract:
1. An oscillator in a liquid comprising: an actuator element oscillating in a reciprocating manner, whereby the distance between the ends of the actuator element varies, and a sound-producing element attached to the actuator element, whereby the actuator element generates a motion in the sound-producing element for producing a sound, the oscillator being provided open, whereby liquid pressure acts both on a first surface and on a second surface of the wall of the sound-producing element while the oscillator is in the liquid, wherein the sound-producing element is structurally configured to comprise a flexible layer in a manner such that the distance between the first surface and the second surface of the wall varies as sound is produced; wherein the sound-producing element is structurally configured in a manner such that the first surface and the second surface of the wall oscillate independently out of phase with each other as sound is produced.