| 摘要 |
In a bending wave loudspeaker the vibration exciter 110 is coupled to a primary bending wave radiator 120. A secondary bending wave radiator 130 provides for the sound output from the loudspeaker and is mechanically coupled in face to face contacting relationship with the primary bending wave radiator 120. The exciter 110 is able to excite bending wave vibrations in the primary substrate 120, and the primary substrate is able to excite bending wave vibrations in the secondary substrate 130. By modifying the mechanical properties (stiffness, impedance) of the substrates 120, 130 the overall frequency response of the loudspeaker is modified, particularly at low frequencies (fig 2). This arrangement may be used to employ vehicle panels including trim panels as bending wave loudspeakers. |
