Patent ID: 6676879
Filing Date: 2004-01-13
Classification: B60R,H04R

Abstract:
A method of making a vehicle interior trim panel having at least one integral resonant bending wave loudspeaker panel, comprising the steps of:designing the trim panel to comprise at least one panel area capable of and intended to operate as a resonant bending wave loudspeaker; making a prototype trim panel to the design; optimising at least one parameter of the prototype panel as concerns its behaviour as a resonant bending wave loudspeaker by obtaining the standard deviation, as frequency is varied, of the mechanical impedance of the panel as a function of the at least on e parameter; selecting at least one value of said at least one parameter that result(s) in a minimum of said standard deviation of the mechanical impedance of the panel; and making a trim panel in which the at least one parameter to be optimised has the selected value or values.