Noise cancelling earset having acoustic filter
AssigneeOrfeo SoundWorks Corporation
InventorEundong Kim
Life of this patent
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Abstract
Disclosed is a noise cancelling earset having an acoustic filter. The earset includes a dynamic driver unit configured to generate a sound, and an acoustic filter configured to cover a back hole formed in a back of the dynamic driver unit, so that the acoustic filter allows air to pass, but does not allow extraneous noise to pass. The acoustic filter includes filter layers selectively formed with a through-hole and a sound passage, and plates with a through-hole selectively communicating with the through-hole and the sound passage. The filter layers and the plates are alternatively disposed on each other, and the through-holes of the plates communicate with the through-holes or the sound passages of the filter layers.
Claims19
A noise cancelling earset comprising:
- a driver unit configured to generate a sound;
- an acoustic filter configured to cover a back hole formed in the driver unit, wherein acoustic filter is disposed between the back hole and a passageway through which an extraneous noise from outside of an external auditory meatus of a wearer of the earset travels, wherein the acoustic filter allows air to pass therethrough so that the back hole is in a fluid communication with the passageway and an air pressure in the back hole is same as an air pressure in the passageway and wherein the acoustic filter blocks the extraneous noise so that the extraneous noise is prevented from entering the back hole;
- a tube having one end disposed in the back hole and extending through the driver unit to define an inner space that is isolated from a sound output space of the driver unit and having an other end into which a sound generated by the wearer and transmitted through the external auditory meatus of the wearer enters;
- and
- a microphone disposed in the inner space of the tube and configured to capture the sound that enters into the other end of the tube, the driver unit and the microphone being installed within a housing that is configured to be mounted inside the external auditory meatus of the wearer,
- wherein the acoustic filter includes:
- a plurality of filter layers each of the plurality of filter layers including at least one of a through-hole and a sound passage, and
- a plurality of plates, each of the plurality of plates including a through-hole that is fluidically communicating with the at least one of the through-hole and the sound passage.
A noise cancelling earset, comprising:
- a driver unit configured to be mounted in an external auditory meatus of a wearer of the earset and having a first side that faces a tympanic membrane of the wearer and a second side that faces opposite to first side, the driver unit being configured to generate and transmit a sound from the first side to the tympanic membrane;
- and
- an acoustic filter attached to the second side of the driver unit and configured to cover a back hole formed in the driver unit and having a plurality of filter layers and a plurality of plates, each of the plurality of filter layers including a sound passage, each of the plurality of plates including a through-hole that is in fluid communication with the sound passage of a neighboring filter layer,
- the acoustic filter configured to provide a fluid communication between the back hole and a passageway through which an extraneous noise from outside of the driver unit travels so that an air pressure in the back hole is same as an air pressure of a passageway while the extraneous noise is prevented from entering the back hole.
Dependencies are inferred from the claim text.