Balanced offset force cancellation using bass and full range transducers
AssigneeApple Inc.
InventorsStuart M. Nevill, Andrew M. Hulva, Scott P. Porter
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Abstract
A transducer assembly comprising: a laterally offset arrangement of different size transducers, the different size transducers comprising at least a first transducer having a diaphragm of a first size arranged in a first direction and a pair of transducers each having a diaphragm of a second size arranged in a second direction to output sound when driven by respective audio signals, and wherein a force produced by the first transducer is cancelled by a sum of forces produced by the pair of transducers when the transduces are driven by the audio signals.
Claims20
A transducer assembly comprising:
- a laterally offset arrangement of different size transducers, the different size transducers comprising at least a first transducer having a diaphragm of a first size arranged in a first direction and a pair of transducers each having a diaphragm of a second size arranged in a second direction to output sound when driven by respective audio signals, and wherein a force produced by the first transducer is cancelled by a sum of forces produced by the pair of transducers when the different size transducers are driven by the audio signals, and at least one of the first transducer or the pair of transducers comprises a full range driver.
An electronic device comprising:
- an enclosure that encloses a transducer assembly, the transducer assembly comprising:
- a first transducer having a diaphragm of a first size facing a first direction and producing a first force in the first direction when driven by an audio signal;
- a second transducer laterally offset from the first transducer and having a diaphragm of a second size facing a second direction, the second transducer producing a second force in the second direction when driven by an audio signal;
- and
- a third transducer comprising a full range driver laterally offset from the first and second transducers and having a diaphragm facing the second direction to produce a third force when driven by an audio signal, and wherein a sum of a surface area of the diaphragms of the second transducer and the third transducer are equal to a surface area of the diaphragm of the first transducer, and a sum of the second and third forces is equal to the first force resulting in an overall force cancellation.
Dependencies are inferred from the claim text.