H - Electricity – 04 – R
Patent
H - Electricity
04
R
H04R 1/42 (2006.01) H04R 1/30 (2006.01)
Patent
CA 2253088
The present invention is a waveguide for an acoustic speaker having a predetermined cone weight. The waveguide body has a speaker end and an open end and an even number of segments with a flat surface in a plane parallel to the speaker end. The segments have inside wall surfaces which flare increasingly outwardly from the speaker, and these inside wall surfaces have a speaker end length, L1, determined by the following formulas, L1 minimum = 0.7 x w z/0.0012g/cm3 x 1/A SE, and L1 maximum = 1.2 x w z/0.0012g/cm3 x 1/A SE, wherein L1 is a straight line length of the lower portion of the segment wall surface, w z is the weight of a speaker cone in grams/cm3, and A SE is the cross-sectional area of the speaker end in square centimeters. Each of the segment inside wall surfaces has an outer end length L2 which has a predetermined length related to L1. There is an angle between the straight line length of the lower portion of the segment wall surface and a center line running down the center of the length of the waveguide, referred to as ~A, which is no greater than 15°.
Faraone Alexander
Ogilvy Renault Llp/s.e.n.c.r.l.,s.r.l.
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