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US 11,082,778 B2Granted
Driver with acoustic filter chamber
AssigneeKnowles Electronics, LLC
InventorErik Wiederholtz
Life of this patent
Estimating the term…
Abstract
In one aspect, a low frequency driver is provided having a diaphragm operable to produce sound, a front volume, and an outlet that receives sound from the front volume and directs sound out from the low frequency driver. The low frequency driver further includes a low-pass filter chamber in communication with the front volume.
Claims19
An acoustic receiver comprising:
- a housing;
- a diaphragm movably disposed within the housing, the diaphragm separating an interior of the housing into a front volume and a back volume,
- a cap that is a separate element from the housing, the cap secured to the housing forming an assembly;
- a low-pass filter chamber having a fixed volume formed in part by the secured cap and in part by a portion of the housing, the low-pass filter chamber coupled to the front volume;
- and
- a sound outlet port disposed between the front volume or the low-pass filter chamber and an exterior of the housing, wherein movement of the diaphragm causes sound to emanate from the front volume and through the sound outlet port, wherein the fixed volume of the low-pass filter chamber affects a frequency response of the acoustic device.
3 more elements
An acoustic device comprising:
- a first acoustic receiver comprising a first housing;
- a second acoustic receiver comprising a second housing that includes a diaphragm movably disposed within the second housing, the diaphragm separating an interior of the second housing into a front volume and a back volume;
- a cap, that is a separate element from the second housing and secured to a portion of the second housing, the secured cap and the portion of the second housing forming a low-pass filter chamber having a fixed volume, the low-pass filter chamber coupled to the front volume by a port, the front volume not acoustically coupled to an interior volume of the first housing;
- and
- a sound outlet port disposed between the front volume or the low-pass filter chamber and an exterior of the second housing, wherein movement of the diaphragm causes sound to emanate from the front volume and through the sound outlet port,
- wherein the fixed volume of the low-pass filter chamber affects a frequency response of the acoustic device.
3 more elements
An acoustic device comprising:
- a first acoustic receiver comprising:
- a first diaphragm movably disposed within a first housing and separating an interior of the first housing into a first front volume and a first back volume;
- a discrete cap a separate from the first housing, the cap secured to the first housing;
- a low-pass filter chamber having a fixed volume formed in part by the cap and in part by a portion of the first housing when the cap is secured to the first housing, the low-pass filter chamber coupled to the first front volume;
- a first sound outlet port disposed between the first front volume or the low-pass filter chamber and an exterior of the first housing, wherein movement of the first diaphragm causes sound to emanate from the first front volume and through the first sound outlet port, wherein the fixed volume of the low-pass filter chamber affects a frequency response of the acoustic device;
- and
- a second acoustic receiver having a second output joined with the first acoustic receiver through a common exit tube.
4 more elements
Dependencies are inferred from the claim text.