SOUND PROPAGATION
| Brand | Owner | Address | Description |
|---|---|---|---|
| COLIEXAL | FRANÇOIS DECRUCK AUDIO SYSTEM | 47 bis, rue de l'Ancien Château, F-92160 ANTONY France | Sound propagation, transmission, dissemination and reproduction apparatus, namely, public address system, stage loudspeakers, cinema screen speakers; sound directivity control devices, namely, waveguides and acoustic horns; sound amplifiers; sound processors; sound card; acoustic conduit; loudspeaker enclosures; audio amplifiers;The word COLIEXAL has no meaning in a foreign language.; |
Where the owner name is not linked, that owner no longer owns the brand |
Technical Examples
- There are provided an ultrasonic transducer that performs transmission and/or reception of an ultrasonic wave, and a propagation medium portion that forms a propagation path of the ultrasonic wave. A density and an acoustic velocity of the propagation medium portion, and a density and a sound velocity of a fluid that fills a circumjacent space are appropriately set, and a propagation loss of the ultrasonic wave into the fluid is reduced to almost zero by refracting the ultrasonic wave at an appropriate angle.