Wide passband omnidirectional loudspeaker
US5014321A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Oct 5, 1989 |
| Grant date | May 7, 1991 |
| Priority date | — |
| Expiry date | Oct 5, 2009 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R15/00
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
The invention relates to a wide passband omnidirectional loudspeaker which has particular application to high fidelity sound reproduction. The loudspeaker has a rigid, magnetostrictive, spherical diaphragm (3), a medium and high frequency electric control means connected to two terminals (4,5) located at two diametrically opposite points of the diaphragm for creating in the vicinity thereof a homogeneous magnetic field with respect to an electric signal applied to the terminals (4,5) of the control means after filtering (2) for eliminating the low frequencies, and a d.c. polarization means (11,12) for the diaphragm. The loudspeaker also has another low frequency electric control means (14) receiving the electric signal after filtering for eliminating the medium and high frequencies. This low frequency electric control means extends longitudinally along an axis (X'X) of the diaphragm and has two ends (16,17) respectively joined to two opposite zones of the diaphragm (3) traversed by axis (X'X).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.