Loudspeaker
AssigneeVifa-Speak A/S
InventorLars Goller
Life of this patent
Estimating the term…
Abstract
A special Hi-Fi tweeter having a ring-shaped dome portion with a retracted central portion fixed to the tweeter chassis was found to present an objectionable drop of response in the 18-20 KHz range. According to the invention this problem is eliminated or minimized in placing in front of said central area a forwardly projecting, generally conical wave guide (18) that will minimize interferences between sound waves radiated forwardly and inwardly from the ring shaped dome. An alternative solution is to arrange, in front of a wider central portion, a shield member directly preventing external radiation from the critical central area, still without changing the shape of the diaphragm. However, also certain modifications are proposed, which may well be used in connection with ordinary dome speakers.
Claims9
In a loudspeaker of the tweeter type having a chassis and a magnet system defining an annular air gap for a voice coil connected with a loudspeaker diaphragm, the loudspeaker diaphragm having an outermost diaphragm portion which interconnects the voice coil and the chassis that is an annular, arch-profiled strip area, and having a central ring-shaped central dome portion with a central recessed area that is rigidly fixed to one of the magnet system and the chassis;
- the improvement comprising an element effectively counteracting external radiation of interference sound waves emanating from waves radiated forwardly and inwardly from the ring-shaped dome portion being provided in front of said central recessed area.
Dependencies are inferred from the claim text.