Adjustable directivity device for a loudspeaker

Abstract

A directivity device for a loudspeaker includes first and second directivity members that are adjustable relative to a reference plane between a plurality of configurations, including a first symmetric configuration in which sound is directed by the first and second directivity members to provide a first symmetric coverage pattern that is symmetric about the reference plane and has a first symmetric coverage angle; a second symmetric configuration in which sound is directed by the first and second directivity members to provide a second symmetric coverage pattern that is symmetric about the reference plane and has a second symmetric coverage angle that is wider than the first symmetric coverage angle; and an asymmetric configuration in which sound is directed by the first and second directivity members to provide an asymmetric coverage pattern that is asymmetric about the reference plane and has an asymmetric coverage angle.

Description

ADJUSTABLE DIRECTIVITY DEVICE FOR A LOUDSPEAKERCROSS-REFERENCE TO RELATED APPLICATIONS

[0001] This application claims the benefit of U.S. provisional application Serial No. 63 / 747,229 filed January 20, 2025, the contents of which are incorporated by reference.FIELD OF THE INVENTION

[0002] The present disclosure relates to a directivity device for a loudspeaker and more particular, a directivity device that is adjustable between a first symmetric configuration, a second symmetric configuration, and an asymmetric configuration.BACKGROUND OF THE INVENTION

[0003] There is an increasing demand for high performance, dynamic loudspeakers. In applications such as touring or rental applications, it is preferable for loudspeakers to be portable and adaptable for different venues. To help adapt a loudspeaker to a particular venue, an adjustable directivity device (e.g., waveguide, horn, etc.) can be used to adjust the coverage pattern of the loudspeaker according to particular circumstances of the venue. For instance, U.S. Patent No. 11,303,995 discloses adaptable waveguides that can be adjusted between various configurations that provide different coverage patterns that are generally symmetric across a vertical plane. The waveguides can be adjusted either manually or automatically with a motorized device (e.g., a rotary motor or a linear actuator).BRIEF SUMMARY OF THE INVENTION

[0004] It would be desirable to provide an adjustable directivity device that can be adjusted to provide both symmetric and asymmetric coverage patterns across a reference plane. In some embodiments, it may be desirable for the directivity device to be manually adjustable in order to simplify use and / or eliminate the need for expensive actuator assemblies. However, in automated embodiments, it would be desirable to provide a non-motorized device for actuation of the directivity device that consumes less space and is less susceptible to mechanical failure than conventional motorized actuators.

[0005] Accordingly, the following presents a simplified summary of example embodiments of the invention. This summary is not intended to identify critical elements or to delineate the scope of the invention.

[0006] In accordance with one aspect, a directivity device for a loudspeaker includes a first directivity member and a second directivity member, wherein the first directivity member and second directivity member are adjustable relative to a reference plane between a plurality of configurations. The plurality of configurations includes a first symmetric configuration in which sound propagating between the first directivity member and second directivity member is directed thereby to provide a first symmetric coverage pattern across the reference plane that is symmetric about the reference plane and has a first symmetric coverage angle; a second symmetric configuration in which sound propagating between the first directivity member and second directivity member is directed thereby to provide a second symmetric coverage pattern across the reference plane that is symmetric about the reference plane and has a second symmetric coverage angle that is wider than the first symmetric coverage angle; and an asymmetric configuration in which sound propagating between the first directivity member and second directivity member is directed thereby to provide an asymmetric coverage pattern across the reference plane that is asymmetric about the reference plane and has an asymmetric coverage angle.

[0007] In accordance with an example of the first aspect, the first symmetric coverage angle is from 70° to 90°, and the second symmetric coverage angle is from 100° to 120°.

[0008] In accordance with another example of the first aspect, the asymmetric coverage angle is from 85° to 105°.

[0009] In accordance with yet another example of the first aspect, each of the first directivity member and second directivity member includes a first coverage profile and a second coverage profile that faces away from the first coverage profile, in the first symmetric configuration, the first coverage profile of the first directivity member faces the first coverage profile of the second directivity member. In the second symmetric configuration, the second coverage profile of the first directivity member faces the second coverage profile of the second directivity member. In the asymmetric configuration, the first coverage profile of the first directivity member faces the second coverage profile of the second directivity member.

[0010] In accordance with still yet another example of the first aspect, each of the first directivity member and second directivity member includes a proximal edge, a first proximal surface that extends from the proximal edge and at least partially defines the first coverage profile, and a second proximal surface that extends from the proximal edge and at least partially defines the second coverage profile. In the first symmetric configuration, the first proximal surfaces of the first and second directivity members face each other and are symmetric about and transverse to the reference plane. In the second symmetric configuration, the second proximal surfaces of the first and second directivity members face each other and are symmetric about and transverse to the reference plane. In the asymmetric configuration, the first proximal surface of the first directivity member and the second proximal surface of the second directivity member face each other and are asymmetric about and transverse to the reference plane.

[0011] In accordance with another example of the first aspect, the first proximal surfaces of the first and second directivity members each extend at a first angle relative to the reference plane in the first symmetric configuration. In the second symmetric configuration, the second proximal surfaces of the first and second directivity members each extend at a second angle relative to the reference plane. In the asymmetric configuration, the first proximal surface of the first directivity member extends at the first angle relative to the reference plane, and the second proximal surface of the second directivity member extends that the second angle relative to the reference plane.

[0012] In accordance with yet another example of the first aspect, the first angle is 35° to 45° and the second angle is 50° to 60°.

[0013] In accordance with still yet another example of the first aspect, each of the first directivity member and second directivity member includes a proximal edge, a first proximal surface that extends from the proximal edge and at least partially defines the first coverage profile, and a second proximal surface that extends from the proximal edge and at least partially defines the second coverage profile. Additionally, the first directivity member and second directivity member define a passageway therebetween for sound, and the proximal edges of the first directivity member and second directivity member define an inlet of the passageway.

[0014] In accordance with another example of the first aspect, each of the first directivity member and second directivity member includes a first end portion and a second end portion. In the first symmetric configuration, the first end portions of the first directivity member and second directivity member face a first direction, and the second end portions of the first directivity member and second directivity member face a second direction opposite to the first direction. In the second symmetric configuration, the first end portions of the first directivity member and second directivity member face the second direction, and the second end portions of the first directivity member and second directivity member face the first direction.

[0015] In accordance with yet another example of the first aspect in the asymmetric configuration, the first end portion of the first directivity member and the second end portion of the second directivity member face the first direction, and the second end portion of the first directivity member and the first end portion of the second directivity member face the second direction.

[0016] In accordance with still yet another example of the first aspect, each of the first directivity member and second directivity member includes a proximal edge, a distal edge, a first proximal surface that extends distally from the proximal edge, a first distal surface that extends proximally from the distal edge, a first intermediate edge that connects the first proximal surface and first distal surface, a second proximal surface that extends distally from the proximal edge, a second distal surface that extends proximally from the distal edge, and a second intermediate edge that connects the second proximal surface and second distal surface.

[0017] In accordance with another example of the first aspect, for each of the first directivity member and second directivity member, the first proximal surface and first distal surface define a first angle therebetween, and the second proximal surface and second distal surface define a second angle therebetween that is different from the first angle.

[0018] In accordance with yet another example of the first aspect, the directivity device further includes

[0019] a first mounting member having a first mounting portion for adjustably mounting the first directivity member, and a second mounting member for adjustably mounting the second directivity member. Each of the first directivity member and second directivitymember includes a first end portion with a first mating element and a second end portion with a second mating element. The first mounting member includes a mating element that mates with the first mating element of the first directivity member in the first symmetric configuration and asymmetric configuration, and the second mating element of the first directivity member in the second symmetric configuration. Moreover, the second mounting member includes a mating element that mates with the first mating element of the second directivity member in the first symmetric configuration, and the second mating element of the second directivity member in the second symmetric configuration and asymmetric configuration.

[0020] In accordance with still yet another example of the first aspect, the mating element of the first mounting member and the mating element of the second mounting member each include one of a projection and a space configured to accommodate the projection. Moreover, the first mating elements and second mating elements of the first directivity member and second directivity member each include the other of the projection and the space.

[0021] In accordance with another example of the first aspect, the first directivity member and second directivity member each include a first indicium that is visible in a viewing direction in the first symmetric configuration, and is not visible in the viewing direction in the second symmetric configuration, and a second indicium that is visible in the viewing direction in the second symmetric configuration, and is not visible in the viewing direction in the first symmetric configuration.

[0022] In accordance with yet another example of the first aspect in the asymmetric configuration, the second indicium of the second directivity member is visible in the viewing direction, and the first indicium of the second directivity member is not visible in the viewing direction.

[0023] In accordance with still yet another example of the first aspect, the first directivity member and second directivity member each include a first end portion having a first indicium that is visible in a viewing direction in the first symmetric configuration, and a second indicum that is not visible in the viewing direction in the first symmetric configuration, wherein the first indicum and second indicum are not visible in the viewing direction in the second symmetric configuration. Additionally, the first directivity member and second directivity member each include a second end portion having a third indiciumthat is visible in the viewing direction in the second symmetric configuration, and a fourth indicum that is not visible in the viewing direction in the second symmetric configuration, wherein the third indicum and fourth indicum are not visible in the viewing direction in the first symmetric configuration.

[0024] In accordance with another example of the first aspect, each of the first directivity member and second directivity member includes a proximal panel, a distal panel, and an intermediate panel that is pivotably coupled to the proximal and distal panels such that the intermediate panel and proximal panel are pivotable relative to each other about a first intermediate pivot axis, and the intermediate panel and distal panel are pivotable relative to each other about a second intermediate pivot axis.

[0025] In accordance with yet another example of the first aspect, the directivity device further includes an actuator assembly that is operable to move the first directivity member and second directivity member between the plurality of configurations via electromagnetic force.

[0026] In accordance with still yet another example of the first aspect, the actuator assembly includes one or more magnetic bodies affixed to the first directivity member and / or second directivity member, and an actuator that is operable to apply a magnetic field to the one or more magnetic bodies to move the first directivity member and second directivity member between the plurality of configurations.

[0027] In accordance with another example of the first aspect, for each of the first directivity member and second directivity member, the proximal panel is pivotally coupled to a housing of a loudspeaker such that the proximal panel is pivotable relative to the housing about a proximal pivot axis, and the distal panel is pivotally coupled to the housing of the loudspeaker such that the distal panel is pivotable relative to the housing about a distal pivot axis.

[0028] In accordance with yet another example of the first aspect, the proximal pivot axis and distal pivot axis are fixed relative to the housing.

[0029] In accordance with still yet another example of the first aspect, a method of using the directivity device includes manipulating the first directivity member and the second directivity member to assume the first symmetric configuration, and propagating sound between the first directivity member and second directivity member in the first symmetricconfiguration to provide the first symmetric coverage pattern; manipulating the first directivity member and the second directivity member to assume the second symmetric configuration, and propagating sound between the first directivity member and second directivity member in the second symmetric configuration to provide the second symmetric coverage pattern; and manipulating the first directivity member and the second directivity member to assume the asymmetric configuration, and propagating sound between the first directivity member and second directivity member in the asymmetric configuration to provide the asymmetric coverage pattern.

[0030] In accordance with another example of the first aspect, a loudspeaker includes a transducer that is operable to produce sound, the directivity device, and a housing that supports the transducer and directivity device, wherein the directivity device is configured to direct the sound produced by the transducer.BRIEF DESCRIPTION OF THE DRAWINGS

[0031] The above and other features, aspects, and advantages of the present application are better understood when the following detailed description of the present application is read with reference to the accompanying drawings, in which:

[0032] FIG. 1 is a perspective view of an example loudspeaker according to a first embodiment;

[0033] FIG. 2 is a cross-sectional perspective view of the first embodiment;

[0034] FIG. 3 is a cross-sectional view of the first embodiment;

[0035] FIG. 4 is an exploded view of a directivity device of the first embodiment;

[0036] FIG. 5 is a cross-sectional view of a directivity member of the directivity device for the first embodiment;

[0037] FIG. 6 is an enlarged cross-sectional view of the first embodiment, wherein the directivity device is arranged in a first symmetric configuration;

[0038] FIG. 7 is an enlarged cross-sectional view of the first embodiment, wherein the directivity device is arranged in a second symmetric configuration;

[0039] FIG. 8 is an enlarged cross-sectional view of the first embodiment, wherein the directivity device is arranged in an asymmetric configuration;

[0040] FIG. 9 is an enlarged cross-sectional view of the loudspeaker according to a second embodiment; and

[0041] FIG. 10 is a perspective view of a directivity device of the second embodiment.DETAILED DESCRIPTION

[0042] With reference to FIG. 1-3, an example loudspeaker 100 includes a housing 102 that supports a pair of low-frequency transducers 104a, 104b, a high-frequency transducer 106, and a control assembly 108 for supplying power to and controlling operation of the transducers 104a, 104b, 106. The housing 102 comprised a plurality of panels and brackets that are fastened together to collectively define a compartment 112 for the transducers 104a, 104b, 106 and control assembly 108. FIG. 2 shows the loudspeaker 100 wherein a top panel of the housing 102 has been removed, whereas FIG. 3 shows a cross-section view of the loudspeaker 100.

[0043] Each transducer 104a, 104b, 106 is electrically operable to produce sound. In particular, the low-frequency transducers 104 are each operable in a range of about 50 Hz to 1000 Hz, and the high-frequency transducer 106 is operable in a range of about 1000 Hz to 20 kHz. It is to be appreciated that other operating ranges are possible for the transducers 104a, 104b, 106 without departing from the scope of the disclosure. Moreover, the loudspeaker 100 can comprise additional, fewer, and / or alternative transducers in other examples. Broadly speaking, the loudspeaker 100 can comprise any configuration having a housing that supports one or more transducers, wherein each transducer is operable within some range to produce sound.

[0044] The loudspeaker 100 can further comprise one or more directivity devices (e.g., waveguides, horns, etc.) that are each configured to direct and shape sound produced by one or more of its transducers. For instance, the loudspeaker 100 in the present embodiment includes a first directivity device 120 in the form of a waveguide that is configured to shape a vertical coverage pattern of sound produced by the high-frequency transducer 106. As shown best in FIG. 3, the first directivity device 120 comprises an outer body 124 that defines an inlet 126 and an outlet 128 of the first directivity device 120, and an inner body 134 that is arranged within the outer body 124 such that a passageway 138 is formed therebetween. Sound from the high-frequency transducer 106 will propagate into the passageway 138 viathe inlet 126 and then exit the passageway 138 via the outlet 128. Moreover, as the sound propagates through the first directivity device 120, the walls of the outer body 124 and inner body 134 will shape a vertical coverage pattern of the sound.

[0045] The loudspeaker 100 in the present embodiment further includes a second directivity device 140 in the form of an adjustable horn that is configured to shape a horizontal coverage pattern of the sound leaving the first directivity device 120. As shown best in FIG. 4, the second directivity device 140 comprises a mounting unit 144 that forms a portion of the loudspeaker housing 102, and first and second (e.g., left and right) directivity members 150a, 150b in the form of blocks that are removably mountable to the mounting unit 144 in different configurations, as discussed further below.

[0046] Each block 150a, 150b comprises a proximal edge 154, a distal edge 158, and a plurality of surfaces extending between the proximal and distal edges 154, 158. In particular, each block 150a, 150b comprises a first proximal surface 162 that extends distally from its proximal edge 154, a first distal surface 164 that extends proximally from its distal edge 158, and a first intermediate edge 166 that connects the first proximal surface 162 and first distal surface 164. Moreover, each block 150a, 150b further comprises a second proximal surface 172 that extends distally from its proximal edge 154, a second distal surface 174 that extends proximally from its distal edge 158, and a second intermediate edge 176 that connects the second proximal surface 172 and second distal surface 174.

[0047] The first proximal surface 162, first distal surface 164, and first intermediate edge 166 collectively define a first coverage profile 168 of each block 150a, 150b, while the second proximal surface 172, second distal surface 174, and second intermediate edge 176 collectively define a second coverage profile 178 of each block 150a, 150b. Moreover, the surfaces 162, 164, 166, 172, 174, 176 of the each block 150a, 150b in the present embodiment are all substantially planar, although non-planar shapes are possible in other examples.

[0048] As shown in FIG. 5, the first proximal surface 162 and first distal surface 164 of the first coverage profile 168 define a first angle 182 therebetween, and the second proximal surface 172 and second distal surface 174 of the second coverage profile 178 define a second angle 184 therebetween that is different from the first angle 182. In the present embodiment, the first angle 182 is about 140° and the second angle 184 is about 145°. Moreover, a thirdangle 186 between the first and second proximal surfaces 162, 172 for each block 150a, 150b is about 30°, and a fourth angle 188 between the first and second distal surfaces 164, 172 for each block 150a, 150b is about 60°. However, the angles 182, 184, 186, 188 can have other values without departing from the scope of the disclosure.

[0049] As noted above, the left and right blocks 150a, 150b can be removably mounted to the mounting unit 144 (see FIG. 4) of the second directivity device 140. To facilitate mounting of the blocks 150a, 150b to the mounting unit 144, each block 150a, 150b has a first end portion 192 defining one or more first mating elements 194, and a second end portion 196 defining one or more second mating elements 198. Meanwhile, the mounting unit 144 includes first and second (e.g., left and right) mounting members 200a, 200b, wherein each mounting member 200a, 200b has a first (e.g., upper) portion 202 defining one or more first (e.g., upper) mating elements 204, and a second (e.g., lower) portion 206 defining one or more second (e.g., lower) mating elements 208.

[0050] In the present embodiment, the first and second mating elements 194, 198 of the left and right blocks 150a, 150b all comprise an identical shape, and the upper and lower mating elements 204, 208 of the left and right mounting members 200a, 200b all comprise an identical shape that can mate with first and second mating elements 194, 198 of the left and right blocks 150a, 150b. In particular, the first and second mating elements 194, 198 of the left and right blocks 150a, 150b each comprise a projection in the shape of a ball detent, and the upper and lower mating elements 204, 208 of the left and right mounting members 200a, 200b each comprise a space (e.g., hole) that can accommodate the projection. As discussed below, this enables the left and right blocks 150a, 150b to be respectively mounted to the left and right mounting members 200a, 200b in different orientations to assume a variety of different configurations for providing different sound coverage patterns.

[0051] For example, the left and right blocks 150a, 150b can both be arranged in a first (e.g., upright) orientation as shown in FIG. 4, such that the first end portions 192 of the blocks 150a, 150b both face upward and the first coverage profiles 168 of the blocks 150a, 150b face each other. As oriented, the left block 150a can be mounted to the left mounting member 200a such that the first and second mating elements 194, 198 of the left block 150a respectively mate with the upper and lower mating elements 204, 208 of the left mounting member 200a. Moreover, the right block 150b can be mounted to the right mounting member200b such that the first and second mating elements 194, 198 of the right block 150b respectively mate with the upper and lower mating elements 204, 208 of the right mounting member 200b. The left and right blocks 150a, 150b as mounted will thus assume a first symmetric configuration, as shown in FIG. 6.

[0052] In the first symmetric configuration, the left and right blocks 150a, 150b will define a first symmetric passageway 220 therebetween having an inlet 222 that is defined by the proximal edges 154 of the blocks 150a, 150b, and an outlet 224 that is defined by the distal edges 158 of the blocks 150a, 150b. Moreover, the left and right blocks 150a, 150b and first symmetric passageway 220 will be symmetric about a reference plane P that bifurcates the outlet 128 of the first directivity device 120. In particular, the first proximal surfaces 162 of the left and right blocks 150a, 150b will face each other and extend transverse to the reference plane P at respective angles 226a, 226b that are substantially equal to each other, such that the first proximal surfaces 162 are symmetric about the reference plane P Preferably, the angle 226a, 226b between each first proximal surface 162 and the reference plane P will be from 35° to 45°, and more preferably about 40°.

[0053] As configured, sound produced by the high-frequency transducer 106 can propagate through the first directivity device 120 and then into the first symmetric passageway 220 of the second directivity device 140 via the inlet 222. The sound will then propagate through the first symmetric passageway 220 and exit the second directivity device 140 via the outlet 224. Moreover, as the sound propagates through the first symmetric passageway 220, the first proximal surfaces 162 of the left and right blocks 150a, 150b will shape the sound to have a first symmetric horizontal coverage pattern across the reference plane P that is symmetric about the reference plane P and has a first symmetric coverage angle corresponding to the sum of the angles 226a, 226b. Preferably, the first symmetric coverage angle will be from 70° to 90°, and more preferably about 80°.

[0054] As shown in FIG. 7, the left and right blocks 150a, 150b can alternatively be mounted to assume a second symmetric configuration wherein the second coverage profiles 178 of the blocks 150a, 150b face each other. More specifically, the blocks 150a, 150b can be flipped from their upright orientation shown in FIG. 4 to a second (e.g., downward) orientation, such that the second end portions 196 of the blocks 150a, 150b both face upward and the second coverage profiles 178 of the blocks 150a, 150b face each other. As oriented,the left block 150a can be mounted to the left mounting member 200a such that the first and second mating elements 194, 198 of the left block 150a respectively mate with the lower and upper mating elements 208, 204 of the left mounting member 200a. Moreover, the right block 150b can be mounted to the right mounting member 200b such that the first and second mating elements 194, 198 of the right block 150b respectively mate with the lower and upper mating elements 208, 204 of the right mounting member 200b. The left and right blocks 150a, 150b as mounted will thus assume the second symmetric configuration shown in FIG.7.

[0055] In the second symmetric configuration, the left and right blocks 150a, 150b will define a second symmetric passageway 230 therebetween having an inlet 232 that is defined by the proximal edges 154 of the blocks 150a, 150b, and an outlet 234 that is defined by the distal edges 158 of the blocks 150a, 150b. Moreover, the left and right blocks 150a, 150b and second symmetric passageway 230 will be symmetric about the reference plane P that bifurcates the outlet 128 of the first directivity device 120. In particular, the second proximal surfaces 172 of the left and right blocks 150a, 150b will face each other and extend transverse to the reference plane P at respective angles 236a, 236b that are substantially equal to each other, such that the second proximal surfaces 172 are symmetric about the reference plane P. Preferably, the angle 236a, 236b between each second proximal surface 172 and the reference plane P will be from 50° to 60°, and more preferably about 55°.

[0056] As configured, sound produced by the high-frequency transducer 106 can propagate through the first directivity device 120 and then into the second symmetric passageway 230 of the second directivity device 140 via the inlet 232. The sound will then propagate through the second symmetric passageway 230 and exit the second directivity device 140 via the outlet 234. Moreover, as the sound propagates through the second symmetric passageway 230, the second proximal surfaces 172 of the left and right blocks 150a, 150b will shape the sound to have a second symmetric horizontal coverage pattern across the reference plane P that is symmetric about the reference plane P and has a second symmetric coverage angle corresponding to the sum of the angles 236a, 236b. Preferably, the second symmetric coverage angle will be from 100° to 120°, and more preferably about 110°.

[0057] As shown in FIG. 8, the left and right blocks 150a, 150b can alternatively be mounted to assume an asymmetric configuration wherein the first coverage profile 168 of theleft block 150a faces the second coverage profile 178 of the right block 150b. More specifically, the left block 150a can be oriented to assume its upright orientation shown in FIG. 4, such that the first end portion 192 of the left block 150a faces upward and the first coverage profile 168 of the left block 150a faces the right block 150b. Meanwhile, the right block 150b can be flipped from its upright orientation shown in FIG. 4 to assume its downward orientation, such that the second end portion 196 of the right block 150b faces upward and the second coverage profile 178 of the right block 150b faces the left block 150a. As oriented, the left block 150a can be mounted to the left mounting member 200a such that the first and second mating elements 194, 198 of the left block 150a respectively mate with the upper and lower mating elements 204, 208 of the left mounting member 200a. Moreover, the right block 150b can be mounted to the right mounting member 200b such that the first and second mating elements 194, 198 of the right block 150b respectively mate with the lower and upper mating elements 208, 204 of the right mounting member 200b. The left and right blocks 150a, 150b as mounted will thus assume the asymmetric configuration shown in FIG. 8.

[0058] In the asymmetric configuration, the left and right blocks 150a, 150b will define an asymmetric passageway 240 therebetween having an inlet 242 that is defined by the proximal edges 154 of the blocks 150a, 150b, and an outlet 244 that is defined by the distal edges 158 of the respective left and right blocks 150a, 150b. Moreover, the left and right blocks 150a, 150b and asymmetric passageway 240 will be asymmetric about the reference plane P that bifurcates the outlet 128 of the first directivity device 120. In particular, the first and second proximal surfaces 162, 172 of the respective left and right blocks 150a, 150b will face each other and be asymmetric about the reference plane P such that the proximal surfaces 162, 172 extend transverse to the reference plane P at respective angles 246a, 246b that are different from each other. The angle 246a between the first proximal surface 162 of the left block 150a and the reference plane P will preferably be from 35° to 45°, and more preferably about 40°. Meanwhile, the angle 246b between the second proximal surface 172 of the right block 150b and the reference plane P will preferably be from 50° to 60°, and more preferably about 55°.

[0059] As configured, sound produced by the high-frequency transducer 106 can propagate through the first directivity device 120 and then into the asymmetric passageway 240 of the second directivity device 140 via the inlet 242. The sound will then propagate through theasymmetric passageway 240 and exit the second directivity device 140 via the outlet 244. Moreover, as the sound propagates through the asymmetric passageway 240, the first and second proximal surfaces 162, 172 of the respective left and right blocks 150a, 150b will shape the sound to have an asymmetric horizontal coverage pattern across the reference plane P that is asymmetric about the reference plane P and has an asymmetric coverage angle corresponding to the sum of the angles 246a, 246b. Preferably, the asymmetric coverage angle will be from 85° to 105°, and more preferably of about 95°.

[0060] The asymmetric configuration of the left and right blocks 150a, 150b shown in FIG.8 is configured to have a wider coverage angle on the right side of the reference plane P than the left side. It is to be appreciated that a similar asymmetric configuration can be implemented that has a wider coverage angle on the left side of the reference plane P by flipping both blocks 150a, 150b such that the first end portion 192 of the left block 150a faces downward and the first end portion 192 of the right block 150b faces upward.

[0061] The blocks 150a, 150b as described above thus can be manipulated to assume a variety of different configurations to provide different shapes of horizontal coverage patterns that are symmetrical or asymmetrical across the reference plane P. In particular, the blocks 150a, 150b can be manually manipulated in order to simplify their use and eliminate the need for expensive actuator assemblies. Moreover, in some examples, each block 150a, 150b can be tethered to a portion of the loudspeaker’s housing 102 (e.g., the mounting unit 144) to prevent loss of the block 150a, 150b while it is removed from the mounting unit 144.

[0062] Additionally, in some examples, indicia (e.g., labels, symbols, colors, etc.) can be provided on the blocks 150a, 150b so that a user can easily identify their configuration. For instance, as shown in FIG. 4, the end portion 192 of each block 150a, 150b can have a first indicium (e.g., “80 this side”) provided on a first side of the end portion 192 that is adjacent to the block’s first coverage profile 168, and a second indicium (e.g., “110 this side”) provided on a second side of the end portion 192 that is adjacent to the block’s second coverage profile 178. Moreover, the second end portion 196 of each block 150a, 150b can have the same configuration of first and second indicia as the first end portions 192, such that the first indicium (e.g., “80 this side”) is provided on a first side of the end portion 196 that is adjacent to the block’s first coverage profile 168, and the second indicium (e g., “110 thisside”) is provided on a second side of the end portion 196 that is adjacent to the block’s second coverage profile 178.

[0063] As such, whenever the blocks 150a, 150b are both mounted upright in the first symmetric configuration (see FIG. 2), the first indicia (e.g., “80 this side”) on the first end portions 192 will be visible in a downward viewing direction, whereas the second indica (e.g., “110 this side”) on the first end portions 192 will be covered by the mounting members 200a, 200b of the mounting unit 144 and will not be visible in the downward viewing direction. Moreover, the indicia on the second end portions 196 will face downward and therefore will also not be visible in the downward viewing direction. The first indicia (e.g., “80 this side”) on the first end portions 192 will thereby indicate the coverage angle (e.g., 80°) of the first symmetric configuration.

[0064] Meanwhile, whenever the blocks 150a, 150b are both flipped upside down to assume the second symmetric configuration, the second indica (e.g., “110 this side”) on the second end portions 196 will be similarly visible in the downward viewing direction, whereas the first indicia (e.g., “80 this side”) on the second end portions 196 will be similarly covered by the mounting members 200a, 200b of the mounting unit 144 and will not be visible in the downward viewing direction. Moreover, the indicia on the first end portions 192 will face downward and therefore will also not be visible in the downward viewing direction. The second indica (e.g., “110 this side”) on the second end portions 196 will thereby indicate the coverage angle (e.g., 110°) of the second symmetric configuration.

[0065] Lastly, whenever the blocks 150a, 150b are arranged in the asymmetric configuration such that the left block 150a is upright and the right block 150b is upside down, the first indicium (e.g., “80 this side”) on the first end portion 192 of the left block 150a and the second indicium (e.g., “110 this side”) on the second end portion 196 of the right block 150b will be visible in the downward viewing direction. Meanwhile, the second indicium (e.g., “110 this side”) on the first end portion 192 of the left block 150a and the first indicium (e.g., “80 this side”) on the second end portion 196 of the right block 150b will be respectively covered by the mounting members 200a, 200b and therefore will not be visible in the downward viewing direction. The first indicium (e.g., “80 this side”) on the first end portion 192 of the left block 150a and the second indicium (e.g., “110 this side”) on the second end portion 196 of the right block 150b can thus indicate that the blocks 150a, 150bare arranged in the asymmetric configuration, since the first and second indicia are different from each other.

[0066] Of course, it is to be appreciated that the first indicia (e.g., “80 this side”) and second indicia (e.g., “110 this side”) of the blocks 150a, 150b can comprise other types of indicia (e.g., numbers, words, symbols, etc.) without departing from the scope of the disclosure. For instance, the first indicium for each block 150a, 150b may alternatively correspond to and indicate the angle 226a, 226b (e.g., 40°) between the block’s first proximal surface 162 and the reference plane P in the first symmetric configuration, and the second indicium for each block 150a, 150b may correspond to and indicate the angle 236a, 236b (e.g., 55°) between the block’s second proximal surface 172 and the reference plane P in the second symmetric configuration. Moreover, in some examples, the first end portions 192 may exclude the second indicia (e.g., “110 this side”) while the second end portions 196 exclude the first indicia (e.g., “80 this side”). Moreover, the blocks 150a, 150b may not include any indicia in some examples.

[0067] Still further, in some examples, the blocks 150a, 150b can be configured to prevent improper installation in other configurations than those described above. For instance, the blocks 150a, 150b can be mounted in a first symmetric configuration in which their end portions 192 are upright and their first coverage profiles 168 face each other. As arranged, the mating elements 194, 198, 204, 208 of the blocks 150a, 150b and mounting members 200a, 200b are configured to properly mate with each other to facilitate mounting of the blocks 150a, 150b. However, a user may accidentally arrange the blocksl50a, 150b such that their end portions 192 are upright and their second coverage profiles 178 face each other. As arranged, the mating elements 194, 198, 204, 208 of the blocks 150a, 150b and mounting members 200a, 200b can be configured such that they will not mate each other, thereby preventing installation in such a configuration.

[0068] The mating elements 194, 198, 204, 208 of the blocks 150a, 150b and mounting members 200a, 200b can thus enable the blocks 150a, 150b to be removably secured to the mounting unit 144 in various intended configurations (e.g., the first and second symmetric configurations), while preventing installation of the blocks 150a, 150b in other configurations. Of course, it is to be appreciated that the mating elements 194, 198, 204, 208 of the blocks 150a, 150b and mounting members 200a, 200b can comprise otherconfigurations that can mate with each other without departing from the scope of the disclosure. For instance, in one example, the upper and lower mating elements 204, 208 of the left and right mounting members 200a, 200b can each comprise a projection, while the first and second mating elements 194, 198 of the left and right blocks 150a, 150b can each comprise a space (e.g., cavity) that can accommodate the projection.

[0069] Moreover, it is to be appreciated that the second directivity device 140 can alternatively be configured so that the blocks 150a, 150b are adjustable to provide different shapes of vertical coverage patterns. For instance, the second directivity device 140 can be rotated 90° relative to the remainder of the loudspeaker 100 so that the blocks 150a, 150b extend longitudinally in the horizontal direction and shape the upper and lower sides of the sound output. Broadly speaking, the second directivity device 140 can be any device that can be manipulated to assume different configurations that provide different coverage patterns for sound propagating therebetween.

[0070] Turning to FIGS. 9 and 10, another embodiment of the loudspeaker 100 will now be described that is similar to the embodiment described above except that the second directivity device 140 has been replaced with an alternative second directivity device 240. In this embodiment, the second directivity device 240 comprises first and second (e.g., left and right) directivity members 250a, 250b, wherein each directivity member 250a, 250b comprises a plurality of panels that are movably coupled together. In particular, each directivity member 250a, 250b comprises a proximal panel 252, a distal panel 254, and an intermediate panel 256 that is movably coupled at its proximal and distal ends to the proximal and distal panels 252, 254, respectively. The proximal and intermediate panels 252, 256 are movably coupled such that each panel is pivotable relative to the other about a first intermediate pivot axis Zi. Moreover, the distal and intermediate panels 254, 256 are movably coupled such that each panel is pivotable relative to the other about a second intermediate pivot axis Z2.

[0071] In the present embodiment, the panels 252, 254, 256 for each directivity member 250a, 250b are separately formed by a single piece of sheet metal, and then pivotally coupled together by hinges 260 (see FIG. 9). Moreover, as shown in FIG. 10, the panels 252, 254, 256 for each directivity member 250a, 250b respectively define a proximal surface 262, a distal surface 264, and an intermediate surface 266, which are all substantially planar surfaces thatface away from the housing 102 of the loudspeaker 100. The surfaces 262, 264, 266 for each directivity member 250a, 250b collectively define a coverage profile 268 for the directivity member 250a, 250b.

[0072] However, the panels 252, 254, 256 can be formed in other manners without departing from the scope of the disclosure. For example, the panels 252, 254, 256 for each directivity member 250a, 250b can be collectively separately formed by a single piece of sheet metal that is bent / folded to define the panels 252, 254, 256, wherein each folded crease enables its adjacent panels 252, 254, 256 to pivot relative to each other. Moreover, the surfaces 262, 264, 266 of the panels 252, 254, 256 may have non-planar shapes in some examples. Still further, each panel 252, 254, 256 can comprise two or more-sub-panels that are pivotably connected to each other.

[0073] The directivity members 250a, 250b can be mounted to the housing 102 of the loudspeaker 100 such that at least one end thereof is pivotally connected to the housing 102. For example, each directivity member 250a, 250b can include a first pivot rod 272 that is fixed to a proximal end of its proximal panel 256 and defines a proximal pivot axis Yi, and a second pivot rod 274 that is fixed to a distal end of its distal panel 256 and defines a distal pivot axis Y2. Moreover, the upper and lower ends of each pivot rod 272, 274 can be insertable into respective spaces (e.g., holes, cavities, channels, etc.) defined by the housing 102 to pivotally couple the proximal and distal panels 252, 256 to the housing 102.

[0074] As configured, the proximal panel 252 can be pivotable relative to the housing 102 about the proximal pivot axis Yi, and the distal panel 256 can be pivotable relative to the housing 102 about the distal pivot axis Y2. In some examples, each pivot rod 272, 274 can be inserted into a space of the housing 102 that is similar in diameter to the pivot rod 272, 274, such that the pivot axis Yi, Y2 of the pivot rod 272, 274 will be fixed relative to the housing 102. In other examples, each pivot rod 272, 274 can be inserted into an elongated channel / track of the housing 102, such that the pivot rod 272, 274 (and its pivot axis Yi, Y2) can translate along the channel / track relative to the housing 102.

[0075] As configured, the directivity members 250a, 250b can be adjusted between a variety of symmetric and asymmetric configurations by pivoting their panels 252, 254, 256 relative to each other and / or the housing 102 to assume different configurations. In each configuration, the coverage profiles 268 of the directivity members 250a, 250b can define apassageway 280 (see FIG. 9) therebetween for sound from the high frequency transducer 106 to propagate, wherein the proximal edges of the proximal panels 252 define an inlet 282 of the passageway 280 and the distal edges of the distal panels 256 define an outlet 284 of the passageway 280. Moreover, as the sound propagates through the passageway 280, the coverage profiles 268 of the directivity members 250a, 250b can direct the sound to provide a coverage pattern with a particular coverage angle. Indeed, the directivity members 250a, 250b can be adjusted to provide similar coverage patterns and coverage angles as the configurations described above with respect to the directivity members 150a, 150b.

[0076] For example, the directivity members 250a, 250b can be adjusted to assume a first symmetric configuration in which the directivity members 250a, 250b (and their subfeatures) are symmetric about the reference plane P, wherein the proximal surfaces 262 of the directivity members 250a, 250b face each other and are transverse to the reference plane P at respective angles that are substantially equal to each other. In this first symmetric configuration, the angle between each proximal surface 262 and the reference plane P will preferably be from 35° to 45°, and more preferably about 40°.

[0077] As configured, sound produced by the high-frequency transducer 106 can propagate through the first directivity device 120 and then into the passageway 280 of the second directivity device 240 via the inlet 282. As the sound propagates through the passageway 280, the proximal surfaces 262 of the directivity members 250a, 250b will shape the sound to have a first symmetric horizontal coverage pattern across the reference plane P that is symmetric about the reference plane P and has a first symmetric coverage angle that is preferably from 70° to 90°, and more preferably about 80°. Thus, the directivity members 250a, 250b as configured can provide a similar coverage pattern as the directivity members 150a, 150b shown in FIG. 6.

[0078] In another example, the directivity members 250a, 250b can be adjusted to assume a second symmetric configuration in which the directivity members 250a, 250b (and their subfeatures) are symmetric about the reference plane P, wherein the proximal surfaces 262 of the directivity members 250a, 250b face each other and are transverse to the reference plane P at respective angles that are substantially equal to each other but wider than first symmetric configuration. In this second symmetric configuration, the angle between each proximalsurface 262 and the reference plane P will preferably be from 50° to 60°, and more preferably about 55°.

[0079] As configured, sound produced by the high-frequency transducer 106 can propagate through the first directivity device 120 and then into the passageway 280 of the second directivity device 240 via the inlet 282. As the sound propagates through the passageway 280, the proximal surfaces 262 of the directivity members 250a, 250b will shape the sound to have a second symmetric horizontal coverage pattern across the reference plane P that is symmetric about the reference plane P and has a second symmetric coverage angle that is preferably from 100° to 120°, and more preferably 110°. Thus, the directivity members 250a, 250b as configured can provide a similar coverage pattern as the directivity members 150a, 150b shown in FIG. 7.

[0080] In yet another example, the directivity members 250a, 250b can be adjusted to assume an asymmetric configuration in which the directivity members 250a, 250b (and their sub-features) are asymmetric about the reference plane P, wherein the proximal surfaces 262 of the directivity members 250a, 250b face each other and are transverse to the reference plane P at respective angles that are different from each other. In this asymmetric configuration, an angle between the proximal surface 262 of the left directivity member 250a and the reference plane P can be preferably from 35° to 45°, and more preferably about 40°. Meanwhile, an angle between the proximal surface 262 of the right directivity member 250b and the reference plane P can be preferably from 50° to 60°, and more preferably about 55°.

[0081] As configured, sound produced by the high-frequency transducer 106 can propagate through the first directivity device 120 and then into the passageway 280 of the second directivity device 240 via the inlet 282. As the sound propagates through the passageway 280, the proximal surfaces 262 of the directivity members 250a, 250b will shape the sound to have an asymmetric horizontal coverage pattern across the reference plane P that is symmetric about the reference plane P and has an asymmetric coverage angle that is preferably from 85° to 105°, and more preferably about 95°. Thus, the directivity members 250a, 250b as configured can provide a similar coverage pattern as the directivity members 150a, 150b shown in FIG. 8.

[0082] The directivity members 250a, 250b can be adjusted to assume a variety of different configurations without departing from the scope of the disclosure. Moreover, this adjustmentcan be performed manually or with an actuator assembly. For instance, in some examples, the directivity device 240 can include a non-motorized actuator assembly comprising a plurality magnetic bodies 292, 294, 296 (see FIG. 10) that are respectively affixed to (e.g., integrally formed with or separately attached to) the panels 252, 254, 256 of the directivity members 250a, 250b, and an electromagnetic actuator in the form of two sub-actuators 298a, 298b (see FIG. 9) that are supported by the housing 102 and associated with the respective directivity members 250a, 250b. Each sub-actuator 298a, 298b is operable to generate a magnetic field for the magnetic bodies 292, 294, 296 of its associated directivity member 250a, 250b, which will cause the magnetic bodies 292, 294, 296 (and the panels 252, 254, 256 affixed thereto) to assume a particular configuration. Moreover, the magnetic field can be adjusted to move the magnetic bodies 292, 294, 296 (and the panels 252, 254, 256 fixed thereto) between any of the configurations described above. In this manner, the directivity device 240 can be adjusted with a non-motorized actuator assembly that consumes less space and is less susceptible to mechanical failure than conventional motorized actuators (e.g., linear actuators).

[0083] Two embodiments of the loudspeaker 100 have been described above with different types of directivity devices. In the first embodiment, the second directivity device 140 comprises first and second directivity members 150a, 150b in the form of blocks that can be manipulated (e.g., flipped) to assume various configurations for directing sound in different coverage patterns. Meanwhile, in the second embodiment, the second directivity device 240 comprises first and second directivity members 250a, 250b having a plurality of panels 252, 254, 256 that can also be manipulated (e.g., pivoted) to assume various configurations for directing sound in different coverage patterns. For the purposes of this disclosure, it is to be appreciated that a directivity member of a directivity device can comprise other shapes and configurations without departing from the scope of the disclosure. Broadly speaking, a directivity member can comprise any type of body (e.g., block, plate, conduit, etc.) that can be manipulated (e.g., flipped, pivoted, translated, etc.) to assume various configurations for directing sound in different coverage patterns.

[0084] The invention has been described with reference to the example embodiments described above. Modifications and alterations will occur to others upon a reading and understanding of this specification. Example embodiments incorporating one or more aspectsof the invention are intended to include all such modifications and alterations insofar as they come within the scope of the appended claims.1

Claims

What is claimed is:

1. A directivity device for a loudspeaker comprising a first directivity member and a second directivity member, wherein the first directivity member and second directivity member are adjustable relative to a reference plane between a plurality of configurations including:a first symmetric configuration in which sound propagating between the first directivity member and second directivity member is directed thereby to provide a first symmetric coverage pattern across the reference plane that is symmetric about the reference plane and has a first symmetric coverage angle,a second symmetric configuration in which sound propagating between the first directivity member and second directivity member is directed thereby to provide a second symmetric coverage pattern across the reference plane that is symmetric about the reference plane and has a second symmetric coverage angle that is wider than the first symmetric coverage angle, andan asymmetric configuration in which sound propagating between the first directivity member and second directivity member is directed thereby to provide an asymmetric coverage pattern across the reference plane that is asymmetric about the reference plane and has an asymmetric coverage angle.

2. The directivity device according to claim 1, wherein the first symmetric coverage angle is from 70° to 90°, and the second symmetric coverage angle is from 100° to 120°.

3. The directivity device according to according to claim 2, wherein the asymmetric coverage angle is from 85° to 105°.

4. The directivity device according to any of the preceding claims, wherein each of the first directivity member and second directivity member includes a first coverage profile and a second coverage profile that faces away from the first coverage profile, wherein:in the first symmetric configuration, the first coverage profile of the first directivity member faces the first coverage profile of the second directivity member,in the second symmetric configuration, the second coverage profile of the first directivity member faces the second coverage profile of the second directivity member, andin the asymmetric configuration, the first coverage profile of the first directivity member faces the second coverage profile of the second directivity member.

5. The directivity device according to claim 4, wherein:each of the first directivity member and second directivity member includes a proximal edge, a first proximal surface that extends from the proximal edge and at least partially defines the first coverage profile, and a second proximal surface that extends from the proximal edge and at least partially defines the second coverage profile,in the first symmetric configuration, the first proximal surfaces of the first and second directivity members face each other and are symmetric about and transverse to the reference plane,in the second symmetric configuration, the second proximal surfaces of the first and second directivity members face each other and are symmetric about and transverse to the reference plane, andin the asymmetric configuration, the first proximal surface of the first directivity member and the second proximal surface of the second directivity member face each other and are asymmetric about and transverse to the reference plane.

6. The directivity device according to claim 5, wherein:in the first symmetric configuration, the first proximal surfaces of the first and second directivity members each extend at a first angle relative to the reference plane,in the second symmetric configuration, the second proximal surfaces of the first and second directivity members each extend at a second angle relative to the reference plane, and in the asymmetric configuration, the first proximal surface of the first directivity member extends at the first angle relative to the reference plane, and the second proximal surface of the second directivity member extends that the second angle relative to the reference plane.

7. The directivity device according to claim 6, wherein the first angle is 35° to 45° and the second angle is 50° to 60°.

8. The directivity device according to claim 4, wherein:each of the first directivity member and second directivity member includes a proximal edge, a first proximal surface that extends from the proximal edge and at least partially defines the first coverage profile, and a second proximal surface that extends from the proximal edge and at least partially defines the second coverage profile, andthe first directivity member and second directivity member define a passageway therebetween for sound, and the proximal edges of the first directivity member and second directivity member define an inlet of the passageway.

9. The directivity device according to any of the preceding claims, wherein:each of the first directivity member and second directivity member includes a first end portion and a second end portion,in the first symmetric configuration, the first end portions of the first directivity member and second directivity member face a first direction, and the second end portions of the first directivity member and second directivity member face a second direction opposite to the first direction, andin the second symmetric configuration, the first end portions of the first directivity member and second directivity member face the second direction, and the second end portions of the first directivity member and second directivity member face the first direction.

10. The directivity device according to claim 9, wherein in the asymmetric configuration:the first end portion of the first directivity member and the second end portion of the second directivity member face the first direction, andthe second end portion of the first directivity member and the first end portion of the second directivity member face the second direction.

11. The directivity device according to any of the preceding claims, wherein each of the first directivity member and second directivity member includes:a proximal edge,a distal edge,a first proximal surface that extends distally from the proximal edge,a first distal surface that extends proximally from the distal edge,a first intermediate edge that connects the first proximal surface and first distal surface, a second proximal surface that extends distally from the proximal edge,a second distal surface that extends proximally from the distal edge, anda second intermediate edge that connects the second proximal surface and second distal surface.

12. The directivity device according claim 11, wherein for each of the first directivity member and second directivity member:the first proximal surface and first distal surface define a first angle therebetween, and the second proximal surface and second distal surface define a second angle therebetween that is different from the first angle.

13. The directivity device according to any one of the preceding claims, further comprising a first mounting member having a first mounting portion for adjustably mounting the first directivity member, and a second mounting member for adjustably mounting the second directivity member, wherein:each of the first directivity member and second directivity member includes a first end portion with a first mating element and a second end portion with a second mating element, the first mounting member includes a mating element that mates with the first mating element of the first directivity member in the first symmetric configuration and asymmetric configuration, and the second mating element of the first directivity member in the second symmetric configuration, andthe second mounting member includes a mating element that mates with the first mating element of the second directivity member in the first symmetric configuration, and the second mating element of the second directivity member in the second symmetric configuration and asymmetric configuration.

14. The directivity device according to claim 13, wherein:the mating element of the first mounting member and the mating element of the second mounting member each comprise one of a projection and a space configured to accommodate the projection, andthe first mating elements and second mating elements of the first directivity member and second directivity member each comprise the other of the projection and the space.

15. The directivity device according to any of the preceding claims, wherein the first directivity member and second directivity member each comprise:a first indicium that is visible in a viewing direction in the first symmetric configuration, and is not visible in the viewing direction in the second symmetric configuration, anda second indicium that is visible in the viewing direction in the second symmetric configuration, and is not visible in the viewing direction in the first symmetric configuration.

16. The directivity device according to claim 15, wherein in the asymmetric configuration, the second indicium of the second directivity member is visible in the viewing direction, and the first indicium of the second directivity member is not visible in the viewing direction.

17. The directivity device according to any of the preceding claims, wherein the first directivity member and second directivity member each comprise:a first end portion having a first indicium that is visible in a viewing direction in the first symmetric configuration, and a second indicum that is not visible in the viewing direction in the first symmetric configuration, wherein the first indicum and second indicum are not visible in the viewing direction in the second symmetric configuration, anda second end portion having a third indicium that is visible in the viewing direction in the second symmetric configuration, and a fourth indicum that is not visible in the viewing direction in the second symmetric configuration, wherein the third indicum and fourth indicum are not visible in the viewing direction in the first symmetric configuration.

18. The directivity device according to any of claims 1-3, wherein each of the first directivity member and second directivity member includes:a proximal panel,a distal panel, andan intermediate panel that is pivotably coupled to the proximal and distal panels such that the intermediate panel and proximal panel are pivotable relative to each other about a first intermediate pivot axis, and the intermediate panel and distal panel are pivotable relative to each other about a second intermediate pivot axis.

19. The directivity device according to claim 18, further comprising an actuator assembly that is operable to move the first directivity member and second directivity member between the plurality of configurations via electromagnetic force.

20. The directivity device according to claim 19, wherein the actuator assembly comprises one or more magnetic bodies affixed to the first directivity member and / or second directivity member, and an actuator that is operable to apply a magnetic field to the one or more magnetic bodies to move the first directivity member and second directivity member between the plurality of configurations.

21. The directivity device according to any of claims 18-20, wherein for each of the first directivity member and second directivity member:the proximal panel is pivotally coupled to a housing of a loudspeaker such that the proximal panel is pivotable relative to the housing about a proximal pivot axis, andthe distal panel is pivotally coupled to the housing of the loudspeaker such that the distal panel is pivotable relative to the housing about a distal pivot axis.

22. The directivity device according to claim 21, wherein the proximal pivot axis and distal pivot axis are fixed relative to the housing.

23. A method of using the directivity device according to any one of the preceding claims, wherein the method comprises:manipulating the first directivity member and the second directivity member to assume the first symmetric configuration, and propagating sound between the first directivity memberand second directivity member in the first symmetric configuration to provide the first symmetric coverage pattern;manipulating the first directivity member and the second directivity member to assume the second symmetric configuration, and propagating sound between the first directivity member and second directivity member in the second symmetric configuration to provide the second symmetric coverage pattern; andmanipulating the first directivity member and the second directivity member to assume the asymmetric configuration, and propagating sound between the first directivity member and second directivity member in the asymmetric configuration to provide the asymmetric coverage pattern.

24. A loudspeaker comprising:a transducer that is operable to produce sound,the directivity device according to any one of the preceding claims, wherein the directivity device is configured to direct the sound produced by the transducer, anda housing that supports the transducer and directivity device.

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