Evacuation of liquid from acoustic space
First Claim
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1. An acoustic module, comprising:
- an acoustic membrane;
an acoustic cavity through which acoustic waves associated with the acoustic membrane travel; and
at least one liquid removal mechanism that removes liquid from the acoustic cavity by;
causing the acoustic membrane to produce a first acoustic signal to force the liquid from the acoustic cavity;
determining that the liquid is still present in the acoustic cavity; and
causing the acoustic membrane to produce a second acoustic signal having a different frequency than the first acoustic signal.
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Abstract
An acoustic module, such as a microphone or speaker module, includes an acoustic membrane that vibrates to produce acoustic waves and an acoustic cavity through which acoustic waves produced by the membrane travel. A liquid removal mechanism removes liquid from the acoustic cavity. Such a liquid removal mechanism may include the acoustic membrane, heating elements, hydrophobic and/or hydrophilic surfaces, and so on. In some cases, the liquid removal mechanism may remove liquid from the acoustic cavity upon connection of the acoustic module and/or an associated electronic device to an external power source.
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Citations
20 Claims
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1. An acoustic module, comprising:
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an acoustic membrane; an acoustic cavity through which acoustic waves associated with the acoustic membrane travel; and at least one liquid removal mechanism that removes liquid from the acoustic cavity by; causing the acoustic membrane to produce a first acoustic signal to force the liquid from the acoustic cavity; determining that the liquid is still present in the acoustic cavity; and causing the acoustic membrane to produce a second acoustic signal having a different frequency than the first acoustic signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 20)
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10. An acoustic module, comprising:
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an acoustic membrane operable to vibrate; an acoustic cavity through which acoustic waves associated with the acoustic membrane travel; at least one liquid removal mechanism operable to remove liquid from the acoustic cavity; and a screen element separating the acoustic cavity from an external environment;
whereina first surface of the screen element that is external to the acoustic cavity is hydrophobic; and a second surface of the screen element that is internal to the acoustic cavity is hydrophilic. - View Dependent Claims (11, 12, 13, 14, 15)
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16. An acoustic module, comprising:
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an acoustic membrane; an acoustic cavity through which acoustic waves associated with the acoustic membrane travel; at least one liquid removal mechanism that removes liquid from the acoustic cavity; and a screen element that separates the acoustic cavity from an external environment and is configurable between a hydrophobic state and a hydrophilic state. - View Dependent Claims (17, 18, 19)
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Specification