Loudspeaker horn and cabinet

Patent metadata

Field	Value
Publication number	US-9754578-B2
Application number	US-201414578615-A
Country	US
Kind code	B2
Filing date	Dec 22, 2014
Priority date	Jan 9, 2014
Publication date	Sep 5, 2017
Grant date	Sep 5, 2017

Abstract

According to various embodiments, a loudspeaker horn and cabinet are designed to achieve a sound coverage pattern characterized by narrow vertical dispersion and a wide horizontal dispersion. A loudspeaker horn may comprise at least two horn sections, each extending from an inlet to a mouth. A first plurality of outlet channels is disposed in an interleaved column with a second plurality of outlet channels. A loudspeaker cabinet may comprise a primary enclosure having a front wall, the front wall having an aperture in which a low frequency loudspeaker driver is mounted. The loudspeaker cabinet further comprises a top baffle section having a top end and a bottom baffle section having a bottom end, each extending vertically from the primary enclosure. The top baffle section has a first width that gradually increases towards the top end and the bottom section has a second width that gradually increases towards the bottom end.

First claim

What is claimed is:

1. A loudspeaker horn, comprising:
first and second horn sections, each extending from an inlet to a mouth;
wherein the first horn section includes a first plurality of outlet channels, and wherein the second horn section includes a second plurality of outlet channels;
wherein the first plurality of outlet channels are disposed in an interleaved column with the second plurality of outlet channels, each channel in the first plurality of channels is positioned above or below a channel in the second plurality of channels in the interleaved column;
wherein the first plurality of outlet channels are disposed in a first direction and the second plurality of outlet channels are disposed in a second direction, and wherein the first direction is substantially perpendicular to the second direction.

2. The loudspeaker horn of claim 1 , further comprising a plurality of electroacoustical drivers for generating sound waves over a range of frequencies, each having a sound outlet port;
wherein the inlet of each respective horn section is acoustically coupled to the outlet port of an electroacoustical driver of the plurality of electroacoustical drivers.

3. The loudspeaker horn of claim 1 , wherein the first plurality of outlet channels are defined by a plurality of channel separators.

4. The loudspeaker horn of claim 3 , wherein the channel separators have a thickness of less than 0.05 times the height of a particular outlet channel of the first plurality of outlet channels.

5. The loudspeaker horn of claim 1 , wherein each of the channel separators forms an edge extending towards the inlet of the first horn section.

6. The loudspeaker horn of claim 5 , wherein the edge extends at least half of the length of the first horn section.

7. The loudspeaker horn of claim 1 , wherein each outlet channel of the first plurality of outlet channels comprises one or more channel dividers, wherein the one or more channel dividers subdivide the first plurality of outlet channels into a plurality of sub-channels.

8. The loudspeaker horn of claim 1 , wherein a leading edge of the horn is substantially rounded.

9. The loudspeaker horn of claim 1 , wherein the first horn section and the second horn section are substantially parallel to one another.

10. The loudspeaker horn of claim 1 , wherein an interior angle formed by the first plurality of outlet channels and the second plurality of outlet channels is greater or less than 90°.

11. A loudspeaker cabinet, comprising:
a primary enclosure having a front wall, the front wall having an aperture in which a low frequency loudspeaker driver is mounted;
a top baffle section having a top end and a bottom baffle section having a bottom end, each of the top baffle section and bottom baffle section extending vertically from the primary enclosure, each of the top baffle section and the bottom baffle having interior volumes contiguous with the primary enclosure's interior volume;
wherein the top baffle section has a first width that gradually increases towards the top end and the bottom baffle section has a second width that gradually increases towards the bottom end;
wherein one or more of the top baffle section or the bottom baffle section has one or more edges that are substantially rounded.

12. The loudspeaker cabinet of claim 11 , wherein the top baffle section is tapered forward.

13. The loudspeaker cabinet of claim 11 , wherein the bottom baffle section is tapered forward.

14. The loudspeaker cabinet of claim 11 , wherein the top and bottom baffle sections are tapered forward, wherein the top baffle section is tapered forward from the primary enclosure at a first angle and the to the bottom baffle section is tapered forward from the primary enclosure at a second angle, and wherein the first angle and the second angle are different.

15. The loudspeaker cabinet of claim 11 , wherein the primary enclosure has one or more edges that are substantially rounded.

16. The loudspeaker cabinet of claim 11 , further comprising a loudspeaker horn disposed in front of the primary enclosure.

17. The loudspeaker cabinet of claim 16 , wherein the loudspeaker horn is mounted in front of the low frequency loudspeaker driver which minimizes interference of sounds emanating from both of the loudspeaker horn and the low frequency loudspeaker driver.

18. A loudspeaker horn and cabinet, comprising:
a loudspeaker cabinet having a front wall, the front wall having an aperture in which a low frequency loudspeaker driver is mounted;
a loudspeaker horn mounted in front of the loudspeaker cabinet, the loudspeaker horn having a first plurality of outlet channels and a second plurality of outlet channels;
wherein the first plurality of outlet channels are disposed in an interleaved column with the second plurality of outlet channels, each channel in the first plurality of channels is positioned above or below a channel in the second plurality of channels in the interleaved column;
wherein the first plurality of outlet channels are disposed in a first direction and the second plurality of outlet channels are disposed in a second direction, and wherein the first direction is substantially perpendicular to the second direction.

19. The loudspeaker horn and cabinet of claim 18 , the loudspeaker cabinet further comprising:
a top baffle section having a top end and a bottom baffle section having a bottom end, each of the top baffle section and the bottom baffle section extending vertically from the primary enclosure;
wherein the top baffle section has a first width that gradually increases towards the top end and the bottom baffle section has a second width that gradually increases towards the bottom end.

Assignees

• Dolby Laboratories Licensing Corp

Inventors

• Smithers Michael

Classifications

• H04R1/30

  Combinations of transducers with horns, e.g. with mechanical matching means {, i.e. front-loaded horns}(horns in general G10K; {transducer enclosures or mountings using a back-loaded horn H04R1/2861; application of horns as guiding means to obtain a predetermined directivity characteristic H04R1/345}) · CPC title

• H04R2201/34

  Directing or guiding sound by means of a phase plug · CPC title

• H04R1/021

  incorporating only one transducer · CPC title

• H04R1/403

  loud-speakers · CPC title

• H04R1/26

  Spatial arrangements of separate transducers responsive to two or more frequency ranges · CPC title