Methods or devices for transmitting, conducting or directing sound in general Methods or devices for protecting against, or for damping, noise or other acoustic waves in general

GPHYSICS G10Musical instruments G10KSOUND-PRODUCING DEVICES ACOUSTICS NOT OTHERWISE PROVIDED FOR

G10K11/00Methods or devices for transmitting, conducting or directing sound in general Methods or devices for protecting against, or for damping, noise or other acoustic waves in general

G10K11/002Devices for damping, suppressing, obstructing or conducting sound in acoustic devices G10K11/004Mounting transducers G10K11/006Transducer mounting in underwater equipment G10K11/008Arrays of transducers G10K11/02Mechanical acoustic impedances Impedance matching G10K11/025horns for impedance matching G10K11/04Acoustic filters ; Acoustic resonators G10K11/08Non-electric sound-amplifying devices G10K11/16Methods or devices for protecting against, or damping of, acoustic waves G10K11/161in systems with fluid flow G10K11/162Selection of materials G10K11/165Particles in a matrix G10K11/168Plural layers of different materials G10K11/172using resonance effects G10K11/175using interference effects Masking sound G10K11/178by electro-acoustically regenerating the original acoustic waves in anti-phase G10K11/1782using single input G10K11/1784using multiple inputs; single output G10K11/1786using multiple inputs; multiple outputs G10K11/1788Structural details G10K11/18Methods or devices for transmitting, conducting, or directing sound G10K11/20Reflecting arrangements G10K11/205for underwater use G10K11/22for conducting sound through hollow pipes G10K11/24for conducting sound through solid bodies G10K11/26Sound-focusing or directing G10K11/28using reflection G10K11/30using refraction G10K11/32characterised by the shape of the source G10K11/34using electrical steering of transducer arrays G10K11/341Circuits therefor G10K11/343using frequency variation or different frequencies G10K11/345using energy switching from one active element to another G10K11/346using phase variation G10K11/348using amplitude variation G10K11/35using mechanical steering of transducers or their beams G10K11/352by moving the transducer G10K11/355Arcuate movement G10K11/357by moving a reflector G10K11/36Devices for manipulating acoustic surface waves