| 摘要 |
A TRANSDUCER (14) FOR PRODUCING A FORCE WHICH EXCITES AN ACOUSTIC RADIATOR, E.G. A PANEL (12) TO PRODUCE AN ACOUSTIC OUTPUT. THE TRANSDUCER (14) HAS AN INTENDED OPERATIVE FREQUENCY RANGE AND COMPRISES A RESONANT ELEMENT WHICH HAS A DISTRIBUTION OF MODES AND WHICH IS MODAL IN THE OPERATIVE FREQUENCY RANGE. PARAMETERS OF THE TRANSDUCER (14) MAY BE ADJUSTED TO IMPROVE THE MODALITY OF THE RESONANT ELEMENT. A LOUDSPEAKER (10) OR A MICROPHONE MAY INCORPORATE THE TRANSDUCER.FIG 1
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