| 摘要 |
<p>An electro acoustic transducer in the form of a loudspeaker is mounted in a cabinet. It has a membrane so constructed that its rigidity follows approximately the functional relationship P=lambda(r)n. Where P= rigidity, lambda = constant coefficient, and n= an integer or real number. Variations include a membrane of constant thickness the density of which alters along a radius in the function S=Llambda1(r)n or the thickness of the membrane may vary in the radial direction according to the function L=lambda2(r)n. In all cases r= the distance along any radius of the loudspeaker membrane.</p> |
