Electro-acoustic transducer diaphragms
First Claim
1. In an electro-acoustic transducer of the type having a diaphragm for the generation of sound and drive means for the diaphragm, and wherein said diaphragm is provided with perforations filled with a damping material having a high level of internal energy absorption to oppose the formation of standing waves in the diaphragm,the improvement wherein said perforations are located in at least three equally spaced bands extending substantially radially with respect to a common central point and curved in the same direction, at least at the radially outer end of the band, through a predetermined angle, and wherein the perforations in each band are located in a plurality of parallel rows extending along the length of the band.
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Accused Products
Abstract
An electro-acoustic transducer having a sound-generating diaphragm and means for driving the diaphragm in which the diaphragm is provided with perforations filled with damping material to oppose the formation of standing waves in the diaphragm. The perforations are arranged in between three and eight generally radially extending curved bands, each band being formed of a plurality of parallel rows of perforations extending along the length of the band.
25 Citations
8 Claims
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1. In an electro-acoustic transducer of the type having a diaphragm for the generation of sound and drive means for the diaphragm, and wherein said diaphragm is provided with perforations filled with a damping material having a high level of internal energy absorption to oppose the formation of standing waves in the diaphragm,
the improvement wherein said perforations are located in at least three equally spaced bands extending substantially radially with respect to a common central point and curved in the same direction, at least at the radially outer end of the band, through a predetermined angle, and wherein the perforations in each band are located in a plurality of parallel rows extending along the length of the band.
Specification