US PATENT SUBCLASS 181 / 400
Current as of: June, 1999
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Elements or material for transforming sound wave energy from high to low pressure and vice versa.
(1) Note. Included herein are means to transmit sound waves from one medium to another medium with minimum reflection, deviation or absorption wherein the means acts as a mechanical impedance matching means. The impedance matching may be a function of the material or may be due to the shape or configuration of an element such as a horn shape.
SEE OR SEARCH THIS CLASS, SUBCLASS:
175+, for material or elements for attenuating sound waves.