Supra-aural headphone noise reducing
First Claim
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1. An earphone for a supra-aural headphone comprising:
- a cup-shaped shell;
a cushion mounted to the shell and comprising a portion of an acoustically open foam having an inside surface and an outside surface, the inside surface defining and acoustically coupled to a passageway having a cross-sectional area and a volumetric dimension;
a cushion cover of a high acoustic impedance material enclosing a portion of the outside surface of the portion of acoustically open foam, wherein the cushion cover and the shell define an interior volume having a volumetric dimension;
a baffle assembly, comprising a baffle plate and an acoustic driver having a diaphragm and radiating surface area, mounted in the baffle plate, the baffle assembly mounted in the earphone to divide the interior enclosed volume into a front enclosed volume portion and a rear enclosed volume portion, the front enclosed volume portion comprising the passageway and the foam, wherein the volumetric dimension of the front enclosed volume is greater than 10 cc and the volumetric dimension of the passageway is less than 10 cc, wherein the earphone is constructed and arranged to be positioned against the ear of a user so that the passageway acoustically couples the diaphragm to the user'"'"'s ear canal.
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Accused Products
Abstract
An earphone for a supra-aural noise reducing headphone, with a front cavity that includes a foam portion and an open passageway. The foam portion supplements the volumetric dimension of the passageway.
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Citations
20 Claims
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1. An earphone for a supra-aural headphone comprising:
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a cup-shaped shell;
a cushion mounted to the shell and comprising a portion of an acoustically open foam having an inside surface and an outside surface, the inside surface defining and acoustically coupled to a passageway having a cross-sectional area and a volumetric dimension;
a cushion cover of a high acoustic impedance material enclosing a portion of the outside surface of the portion of acoustically open foam, wherein the cushion cover and the shell define an interior volume having a volumetric dimension;
a baffle assembly, comprising a baffle plate and an acoustic driver having a diaphragm and radiating surface area, mounted in the baffle plate, the baffle assembly mounted in the earphone to divide the interior enclosed volume into a front enclosed volume portion and a rear enclosed volume portion, the front enclosed volume portion comprising the passageway and the foam, wherein the volumetric dimension of the front enclosed volume is greater than 10 cc and the volumetric dimension of the passageway is less than 10 cc, wherein the earphone is constructed and arranged to be positioned against the ear of a user so that the passageway acoustically couples the diaphragm to the user'"'"'s ear canal. - View Dependent Claims (2, 3, 4, 5, 6)
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7. An earphone for an active noise reduction headset comprising:
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a generally planar baffle having first and second baffle surfaces with an opening therethrough;
a first enclosed volume portion comprising the first baffle surface;
a foam structure having first and second generally planar surfaces and sides and an opening therethrough, the opening having two ends, the first planar surface of the foam structure mounted against the first baffle surface so that the baffle opening is adjacent the first end of the cushion opening with the foam structure opening acoustically coupled to the foam structure;
a cushion cover of acoustically closed material, covering the second planar surface of the foam structure, except for the second end of the cushion opening;
a second enclosed volume portion comprising the second baffle surface; and
a cup-shaped shell;
wherein the cushion cover is constructed and arranged to seal against the external portion of a user'"'"'s ear. - View Dependent Claims (8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. An earphone for an active noise reduction headset, comprising:
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an acoustic driver;
a high acoustical impedance material enclosing a volume having a volumetric dimension, constructed and arranged to acoustically couple the acoustic driver and a user'"'"'s ear and be sealed to the user'"'"'s ear;
an open passageway constructed and arranged to be between the acoustic driver and the ear inside the volume, the open passageway having a volumetric dimension;
a portion of substantially acoustically open foam in the volume, the foam having a volumetric dimension, and acoustically coupled to the passageway so that the volumetric dimension of the foam significantly acoustically increases the volumetric dimension of the passageway to better passively attenuate noise that enters the volume;
wherein the foam volumetric dimension is greater than the passageway volumetric dimension. - View Dependent Claims (18, 19, 20)
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Specification