Loudspeaker and electrodynamic acoustic transducer with bulbous waveguide tip
US9426576B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 25, 2015 |
| Grant date | Aug 23, 2016 |
| Priority date | — |
| Expiry date | Feb 25, 2035 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R2201/34
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An electrodynamic acoustic transducer has a diaphragm and a frame with a pole piece carrying a bulbous waveguide tip which reduces or eliminates high frequency distortions caused by destructive interference within the transducer. The bulbous-tip structure clears the moving parts of the transducer and minimizes diffraction of sound energy, extending forward approximately to the plane defined by the outer periphery of the diaphragm when the diaphragm and voice coil are at rest. The bulbous-tip waveguide member extends radially outward above the central radiating area of the transducer diaphragm or cone so as to obscure the center portion of the diaphragm.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.