Ultra-Low Profile Loudspeakers
AssigneeDr. G Licensing, LLC
InventorGodehard A. Guenther
Life of this patent
Estimating the term…
Abstract
The invention provides in some aspects a loudspeaker comprising an enclosure, a driver that is mounted in the enclosure, and an active diaphragm that is coupled to the driver to generate frontward-directed sound waves (“front waves”) directed outwardly from the enclosure and backward-directed sound waves (“back waves”) directed inwardly into the enclosure. A foam member, disposed within the enclosure and/or on an inner surface of a wall thereof, attenuates components of the back wave as a function of frequency, e.g., in the manner of a low-pass filter. The foam member comprises a foam of rigid material, namely, by way of example, a foam of metal, ceramic, carbon, silicon, glass, and/or epoxy.
Claims31
A loudspeaker, comprising
- A. an enclosure,
- B. a driver that is mounted in the enclosure,
- C. the driver including an active diaphragm that generates a front wave directed outwardly from the enclosure and a back wave directed inwardly into the enclosure,
- D. a foam member disposed any of within the enclosure or on an inner surface of a wall thereof, which foam member attenuates components of the back wave as a function of frequency, and
- E. a reflective member disposed any of within the enclosure or on an inner surface of a wall thereof, which reflective member reflects one or more components of the back wave that have passed through the foam member and that have not been eliminated thereby.
A loudspeaker, comprising
- A. a foam member comprising an enclosure,
- B. a driver that is disposed within the enclosure,
- C. the driver including an active diaphragm that generates a front wave directed outwardly from the enclosure and a back wave directed inwardly into the enclosure,
- D. the foam member comprising a foam of any of metal, ceramic, carbon, silicon, glass, epoxy or other rigid material, the foam member having an acoustically reflective layer.
Dependencies are inferred from the claim text.