Resonant element transducer
AssigneeNew Transducers Limited
InventorsGraham Bank, Neil Harris, Martin Colloms
Life of this patent
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Abstract
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.
Claims105
An electromechanical force transducer having an intended operative frequency range, comprising a resonant element having a frequency distribution of modes in the operative frequency range, and a mount on the resonant element for mounting the transducer to a site to which force is to be applied.
A loudspeaker comprising an acoustic radiator, an electromagnetic force transducer having an operative frequency range for exciting the acoustic radiator to produce an acoustic output, and a mount for mounting the transducer to a site on the acoustic radiator to which transducer force is applied, wherein the transducer comprises a resonant element having a frequency distribution of modes in the operative frequency range, and the mount is attached to the resonant element at a position which is beneficial for coupling modal activity of the resonant element to the acoustic radiator.
A method of making a loudspeaker comprising a resonant acoustic radiator and transducer mounted to the acoustic radiator and having an operative frequency range for exciting the acoustic radiator to produce an acoustic output, wherein the transducer comprises a resonant element having a frequency distribution of modes in the operative frequency range, the method comprising the steps of analysing the mechanical impedances of the resonant element and the acoustic radiator, selecting and/or adjusting the parameters of the acoustic radiator and/or the element to achieve the required modality of the resonant element and/or the acoustic radiator and to achieve a required power transfer between the element and the acoustic radiator.
A method of making a loudspeaker comprising a resonant acoustic radiator and transducer mounted to the acoustic radiator and having an operative frequency range for exciting the acoustic radiator to produce an acoustic output, wherein the transducer comprises a resonant element having a frequency distribution of modes in the operative frequency range, the method comprising the steps of analysing and/or comparing the variation of velocity and force for a given modally actuated acoustic system, and selecting a combination of values of velocity and force to achieve a chosen power transfer.
A microphone comprising a member capable of supporting audio input and a transducer coupled to the member via a mount to provide an electrical output in response to incident acoustic energy on the member, wherein the transducer comprises a resonant element having a frequency distribution of modes in an operative frequency range, and the mount is attached to the resonant element at a position which is beneficial for coupling to modal activity of the resonant element.
Dependencies are inferred from the claim text.