Electromagnetic interference shields with piezos
First Claim
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1. An electronic device comprising:
- an electronic device housing;
a printed circuit board (PCB);
a component, the component being mounted on the PCB and substantially enclosing a first volume of air;
an audio exit opening arranged through a surface of the electronic device housing;
an audio seal enclosing a second volume of air within the electronic device housing, the second volume of air in direct contact with the component and the audio exit opening; and
a speaker mounted on a surface of the component so that the first volume of air enclosed by the component serves as a back volume and the second volume of air serves as a front volume, the two volumes of air operative to enhance sound waves produced by the speaker.
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Abstract
Methods and apparatus for improving the acoustical performance associated with a speaker, such as a piezoelectric speaker, are disclosed. According to one aspect, an apparatus includes a substrate, a can mounted on the substrate, and a piezoelectric speaker arrangement. The piezoelectric speaker arrangement is at least partially mounted on the can. In one embodiment, the substrate is a printed circuit board (PCB) and the can is an electromagnetic interference (EMI) shielding can.
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Citations
23 Claims
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1. An electronic device comprising:
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an electronic device housing; a printed circuit board (PCB); a component, the component being mounted on the PCB and substantially enclosing a first volume of air; an audio exit opening arranged through a surface of the electronic device housing; an audio seal enclosing a second volume of air within the electronic device housing, the second volume of air in direct contact with the component and the audio exit opening; and a speaker mounted on a surface of the component so that the first volume of air enclosed by the component serves as a back volume and the second volume of air serves as a front volume, the two volumes of air operative to enhance sound waves produced by the speaker. - View Dependent Claims (2, 3, 4)
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5. An electronic device comprising:
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a printed circuit board (PCB); at least one electrical component, the at least one electrical component being mounted on the PCB; an electromagnetic interference (EMI) shield, the EMI shield being mounted directly to the PCB over and around the at least one electrical component and a first volume of air; a second volume of air sealed within a portion of the electronic device, the second volume of air contained proximate to the EMI shield; an audio exit opening configured to port audio out of the electronic device; and a speaker mounted on an exterior surface of the EMI shield so that the first volume of air enclosed by the EMI shield serves as a back volume and the second volume of air serves as a front volume, the first and second volumes of air operative to enhance sound waves produced by the speaker. - View Dependent Claims (6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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21. An audio system disposed within an enclosure, the audio system comprising:
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a printed circuit board (PCB); an electromagnetic interference (EMI) shield coupled directly to the PCB and surrounding a first volume of air; a speaker coupled to an exterior surface of the EMI shield; a seal confining a second volume of air within a portion of the enclosure such that the second volume of air is in contact with the exterior surface of the EMI shield, wherein the first and second volumes of air act respectively as back and front volumes of air for the speaker, the front and back volumes of air operative to enhance sound waves produced by the speaker. - View Dependent Claims (22, 23)
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Specification