Transducers with light radiating heads submerged in a fluid and process for emitting low-frequency acoustic waves

摘要

Two (3) horns may be used and their peripheral edge is brought together with the internal wall of the casing (5) making a gap (e) of several tenths of a millimetre. Behind the horn and within the casing is placed a dynamic load (17) partially dividing the space into linked rear (71) and front (72) parts. Waves are emitted in a frequency range below that of the initial given range and at the most with the same initial power consumption. The range of frequencies used is around that belonging to the rear part of the space. The load is a solid wall (23) with a hole (18) for a channel (19) extending away from the horn and leaving a space around the driver (1).