Evacuation of liquid from acoustic space

摘要

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.

主权项

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; andcausing the acoustic membrane to produce a second acoustic signal having a different frequency than the first acoustic signal.