JP2009065609A - Speaker device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a speaker device capable of appropriately reducing phase interference even if speaker arrangement angles in installing a plurality of speakers are made different. <P>SOLUTION: A speaker device 1 includes a speaker driver 3 and a horn unit 5, and the horn unit 5 consists of a flare section 7 and a waveguide section 9. The waveguide section 9 includes a plurality of waveguide tubes 11 which can be bent, have an equal length and are disposed in such a way that tube exits 15 at a side of the flare 7 form a tube exit line 17, and a phase characteristic adjusting mechanism 19 for adjusting phase characteristics by changing a shape of the tune exit line 17. The phase characteristics can be adjusted in such a way that phase interference is reduced in accordance with the layout of speakers. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a speaker device capable of adjusting phase characteristics.

  Conventionally, speaker devices are used in various facilities such as exercise facilities and concert venues. In such a large facility, a plurality of speaker devices may be stacked and used. A configuration in which a plurality of speaker devices are arranged is called a speaker array.

  A conventional ordinary speaker device is a spherical wave speaker and has a spherical phase characteristic. The phase characteristic is one of the speaker characteristics and represents the shape of a sound wave surface (phase equivalent surface or the same phase surface) output from the speaker. A spherical wave speaker is disadvantageous in that it causes phase interference when used in a speaker array as described below.

  FIG. 14A shows a state in which a plurality of spherical wave speakers 101 are stacked. As shown in the figure, the wave fronts of the adjacent speakers 101 cross each other, causing a phase shift. Phase interference means that a phase shift of ¼ wavelength or more occurs. When phase interference occurs, the sound is locally reduced.

  A plane wave speaker is known as a technique capable of reducing phase interference. A plane wave speaker is a speaker having a flat phase characteristic. The actual sound wave surface (same phase surface) of the plane wave speaker has a cylindrical shape, but the term “plane wave speaker” is generally used, and the phase characteristic is also called a plane. Therefore, in this specification as well, a speaker having a cylindrical wavefront is called a plane wave speaker.

  FIG. 14B shows a state in which a plurality of plane wave speakers 103 are stacked. As shown in the figure, since the phase characteristic is flat, the wave fronts of the adjacent speakers 103 do not intersect with each other, and phase interference is reduced. Thereby, a sound can be made to reach evenly far.

Such a plane wave speaker is disclosed in Patent Document 1, for example. In the plane wave speaker of this document, the horn part is composed of a flare and a waveguide, and the waveguide guides sound from the speaker driver to the flare. The waveguide is divided into a plurality of passages, and the outlets of the plurality of passages form a row. By aligning the phases of the exits of these passages, the phase characteristics become flat and a plane wave is output.
US Pat. No. 6,668,969

  However, in a conventional speaker device, phase interference can be prevented when the speaker arrangement angle (an angle formed by adjacent speakers) is optimally set, but phase interference occurs when the speaker arrangement angle is changed from the optimum value. There's a problem. Therefore, phase interference may occur if the speaker arrangement is freely set according to the situation of the installation location.

  In the example of FIG. 14B, the plane wave speakers 103 are linearly arranged. The linear arrangement shown in FIG. 14B is suitable for transmitting sound far away in a vast place. Since the phase characteristic is flat, no phase interference occurs. However, in a place where the depth is small, it is required to arrange the speakers in an arc shape as shown in FIG. When the plane wave speaker 103 is arranged in an arc shape in response to such a request, the wave fronts intersect as shown in the figure, and phase interference occurs.

  The present invention has been made to solve the conventional problems, and it is an object of the present invention to provide a speaker device that can suitably reduce phase interference and improve acoustic characteristics even when the speaker arrangement angle is varied.

  The speaker device of the present invention includes a speaker driver and a horn unit connected to the speaker driver, and the horn unit includes a flare unit and a wave guide unit that guides sound from the speaker driver to the flare unit. The wave guide portions are bendable and of equal length, and a plurality of wave guide tubes arranged so that the tube outlets on the flare side form tube outlet rows, and the tubes of the plurality of wave guide tubes A phase characteristic adjusting mechanism that adjusts the phase characteristic by changing the shape of the tube outlet row formed by the outlets.

  With this configuration, the waveguide section is configured by a plurality of waveguide tubes that can be bent and have the same length, and the phases of the tube outlet rows are equal. The phase characteristic adjusting mechanism adjusts the phase characteristic by changing the shape of the tube outlet row. Thereby, the phase characteristics can be adjusted so as to reduce the phase interference in accordance with the speaker arrangement. Therefore, even when the speaker arrangement angles are varied, the phase interference can be suitably reduced and the acoustic characteristics can be improved.

  Further, in the speaker device of the present invention, the phase characteristic adjusting mechanism makes the phase characteristic planar by making the shape of the tube outlet row straight, and makes the phase by making the shape of the tube outlet row curved. The characteristic is configured to be spherical. With this configuration, one speaker device can function as a plane wave speaker and a spherical wave speaker. The phase characteristics can be switched according to the installation location, and the phase interference can be suitably reduced even if the speaker arrangement angle changes.

  In the speaker device of the present invention, the phase characteristic adjusting mechanism includes a tube outlet support member to which tube outlet portions of the plurality of waveguide tubes are attached, and the tube outlet support member along the direction of the tube outlet row. And a deforming mechanism for changing the shape. With this configuration, the phase characteristics can be adjusted with a simple configuration such as a tube outlet support member and a mechanism for changing the shape thereof.

  In the speaker device of the present invention, the deformation mechanism makes the phase characteristic spherical by curving the tube outlet support member. With this configuration, a spherical wave can be generated and a phase characteristic can be adjusted with a simple configuration in which the tube outlet support member is curved.

  In the speaker device of the present invention, the deformation mechanism has at least one adjustment screw that can be screwed in the direction of the tube outlet row to change the screw position, and the adjustment screw is engaged with the tube outlet support member. When the screw position is changed, the tube outlet support member is deformed. With this configuration, the shape of the tube outlet support member can be changed with a simple configuration using screws, and the phase characteristics can be adjusted.

  As described above, according to the present invention, by providing the phase characteristic adjustment mechanism that adjusts the phase characteristic by changing the shape of the tube outlet row, the phase interference can be suitably reduced even when the speaker arrangement angles are different. Thus, it is possible to provide a speaker device having an effect of improving acoustic characteristics.

  Hereinafter, a speaker device according to an embodiment of the present invention will be described with reference to the drawings.

  A speaker device according to an embodiment of the present invention is shown in FIGS. FIG. 1 is a side view of the speaker device 1. FIG. 2 is a diagram of the speaker device 1 viewed from the front, that is, a diagram viewed from the front side (flare side) along the speaker central axis L. FIG.

  As illustrated, the speaker device 1 includes a speaker driver 3 and a horn unit 5 connected to the speaker driver 3. The speaker driver 3 and the horn unit 5 are provided in the speaker housing. However, the speaker housing is omitted from the drawing.

  The horn part 5 includes a flare part 7 and a wave guide part 9. The wave guide unit 9 is located between the speaker driver 3 and the flare unit 7 and guides sound from the speaker driver 3 to the flare unit 7.

  The waveguide section 9 is composed of a plurality of waveguide tubes 11. Each waveguide tube 11 is a tubular member, which connects the speaker driver 3 and the flare portion 7, and the space in the tube forms a sound path. The sound paths of the plurality of waveguide tubes 11 function together as a sound path for the entire waveguide unit 9.

  In FIG. 1, the tube inlet 13 is an end portion on the speaker driver 3 side in each waveguide tube 11, and the tube outlet 15 is an end portion on the flare portion 7 side. The tube inlet 13 is connected to the speaker driver 3, and the tube outlet 15 is connected to the flare portion 7. The plurality of tube inlets 13 are arranged so as to gather at the center of the speaker driver 3. The shape of each tube inlet 13 may be circular. Each tube inlet 13 is hexagonal, and the plurality of tube inlets 13 may be arranged in a honeycomb shape, whereby the gap between adjacent tube inlets 13 can be reduced. On the other hand, the plurality of tube outlets 15 are arranged with a small gap at the end of the wave guide portion 9 (inlet of the flare portion 7), forming a vertical row. This row is referred to as tube outlet row 17.

  As illustrated, the thickness of each waveguide tube 11 is not constant. The waveguide tube 11 is thinnest at the tube inlet 13, gradually widens toward the tube outlet 15, and is thickest at the tube outlet 15. This is to increase the sound path area along the central axis of the speaker. First, the sum of the sound path areas may be set so as to increase according to an exponential function as in a normal speaker. And according to this total value, the shape of the inner space of each waveguide tube 11 may be determined.

  Moreover, in this Embodiment, the length of all the waveguide tubes 11 is set equally. Since the tube lengths are equal, the phases are uniform between the waveguide tubes 11, and the phases of all the tube inlets 13 are equal in the tube outlet row 17. That is, the waveguide section 9 and the plurality of waveguide tubes 11 function as a phase control section, and the tube outlet row 17 (the end of the waveguide section 9) is a phase equivalent section.

  Moreover, in this Embodiment, the waveguide tube 11 is comprised with the member which can be bent, and the shape along a longitudinal direction can be changed freely. Since the waveguide tube 11 has flexibility, when the tube outlet row shape is changed as will be described later, the waveguide tube 11 can be deformed following the tube outlet row shape, and the flare 7 and the speaker driver 3 are connected. Maintain the state to do.

  Although six waveguide tubes 11 are shown in FIG. 1, the number of waveguide tubes 11 is not limited to this. In the example of FIG. 2, the tube outlet row 17 is a single row. However, the tube outlet row 17 may be a plurality of rows.

  In the present embodiment, the wave guide unit 9 further includes a phase characteristic adjusting mechanism 19 at a connection portion with the flare 7. The phase characteristic adjusting mechanism 19 is a mechanism that adjusts the phase characteristic by changing the shape of the tube outlet row 17. The shape of the tube outlet row 17 is a shape when the tube outlet row 17 is viewed from the direction of FIG. 1, and is a shape when the tube outlet row 17 is viewed from the side. This is the shape of the tube outlet row 17 in the plane including the tube outlet row 17.

  As described above, in the present embodiment, the lengths of the waveguide tubes 11 are set to be equal, and the phases are aligned at all the tube outlets 15. That is, the waveguide unit 9 functions as a phase control unit, and the tube outlet row 17 is a phase equivalent unit. Since the phases of all the tube outlets 15 are equivalent, the shape of the tube outlet row 17 is directly the shape of a sound wave surface (phase equivalent surface or the same phase surface), that is, phase characteristics. Therefore, the phase characteristics can be adjusted by changing the shape of the tube outlet row 17.

  In the example of FIG. 1, the shape of the tube outlet row 17 is a straight line. Therefore, the phase characteristic is flat, and a plane wave (actual wavefront is cylindrical) is formed. That is, the speaker device 1 functions as a plane wave speaker.

  FIG. 3 shows a state where the shape of the tube outlet row 17 is changed to a curved line (arc). In this case, the phase characteristic is a spherical surface corresponding to the curve. The speaker device 1 functions as a spherical wave speaker.

  In the present embodiment, as described above, the waveguide tube 11 can be bent. Therefore, when the tube outlet row shape is changed, each waveguide tube 11 can be appropriately deformed following the tube outlet row shape due to its flexibility, and the state in which the flare 7 and the speaker driver 3 are connected can be maintained. Is possible.

  More specifically, in the example of FIG. 1, since the tube outlet row shape is a straight line, the distance between the speaker driver 3 and the tube outlet 15 decreases as the speaker central axis L is approached. Therefore, the tube shape of the waveguide tube 11 in which the tube outlet 15 is located near the speaker center axis L is greatly bent. In the waveguide tube 11 in which the tube outlet 15 is located far from the speaker central axis L, the tube shape is hardly bent and is substantially linear.

  In the example of FIG. 3, the tube outlet row shape is an arc. Compared with FIG. 1, the distance between the speaker driver 3 and the tube outlet row 17 near the speaker central axis L is large. Therefore, the difference of the driver-tube exit distance according to the distance from the speaker central axis L is reduced. The shape of the waveguide tube 11 changes according to such a change in the shape of the outlet row. As a result, in the waveguide tube 11 in which the tube outlet 15 is located near the speaker center axis L, the degree of bending is small and the tube shape is close to a straight line.

  As described above, the tube shape changes in accordance with the tube outlet row shape. However, since the tube lengths are equal, the phase of the tube outlet row is uniform between the tubes even if the tube shape changes.

  FIG. 4 shows a preferred configuration example of the phase characteristic adjusting mechanism 19. In the upper part of FIG. 4, the phase characteristic adjusting mechanism 19 makes the shape of the tube outlet row 17 a straight line, and in the lower part of FIG. 4, the phase characteristic adjusting mechanism 19 makes the shape of the tube outlet row 17 an arc.

  The phase characteristic adjusting mechanism 19 includes a tube outlet support member 21 and a deformation mechanism 23 thereof. The tube outlet support member 21 is a member to which a tube outlet portion is attached, and is a plate-like member in the present embodiment. A plurality of openings are arranged in the tube outlet support member 21 in the tube outlet row direction (direction along the tube outlet row 17, perpendicular to the speaker central axis L, the same applies hereinafter). A tube outlet 15 is fixed to each opening. The tube outlet support member 21 is an elastically deformable member. The tube outlet support member 21 is, for example, a metal plate or a resin plate.

  The deformation mechanism 23 is configured to change the shape of the tube outlet support member 21 along the tube outlet row direction. In the present embodiment, the deformation mechanism 23 is a mechanism that bends the tube outlet support member 21 by pressing the tube outlet support member 21 from both sides in the tube outlet row direction. It is configured.

  As shown in FIG. 4, two adjustment screws 25 are arranged on both sides of the tube outlet support member 21 in the tube outlet row direction. Each adjustment screw 25 is engaged with a screw hole of the collar 27. The collar 27 is fixed to the housing 29 of the speaker device 1.

  The adjustment screw 25 can be screwed in the direction of the tube outlet row to change the screw position. As shown in the lower part of FIG. 4, when the two adjustment screws 25 are screwed and the distance between the screw tips is reduced, both ends of the tube outlet support member 21 are pushed by the two adjustment screws 25, and the tube outlet support member 21 is curved. To do. As shown in the upper part of FIG. 4, when the two adjusting screws 25 are loosened, the distance between the screw tips increases, and the tube outlet support member 21 returns to a flat state.

  The adjustment screw 25 may be fixed to the tube outlet support member 21. In this case, when the adjustment screw 25 is loosened, the tube outlet support member 21 becomes flat following the adjustment screw 25. Further, the adjustment screw 25 may not be fixed to the tube outlet support member 21. Since the tube outlet support member 21 is elastically deformed, when the adjustment screw 25 is loosened, the shape of the tube outlet support member 21 naturally returns. Further, an urging member such as a spring may be provided, and an urging force in a direction in which the shape is restored may be applied to the tube outlet support member 21.

  The deformation mechanism 23 may be a mechanism that changes the curvature of the tube outlet support member 21. When the tube outlet support member 21 is flat, the curvature is 0 (the radius of curvature is infinite). When the deformation mechanism 23 presses the tube outlet support member 21 from both sides, the shape of the tube outlet support member 21 becomes an arc shape and the curvature increases (the radius of curvature decreases).

  5 to 9 show the configuration of the speaker device 1 in more detail. FIG. 5 is a perspective view of the speaker device 1. FIG. 6 is a view of the speaker device 1 as seen from the lateral direction as in FIG. 1, and FIG. 7 is a plan view. 8 (a), 8 (b), and 8 (c) are cross-sectional views of the speaker device 1 taken along lines AA, EE, and FF in FIG. 6, respectively. is there. 9A and 9B are cross-sectional views of the speaker device 1 taken along lines CC and DD in FIG. 7, respectively. In the example of these figures, the number of waveguide tubes 11 is nine.

In the example of the figure, the speaker device 1 is in a state of functioning as a plane wave speaker, and the tube outlet row shape is a straight line. Therefore, as in the example of FIG. 1, the waveguide tube 11 near the center is greatly bent as compared with the waveguide tube 11 at the end. That is, as shown in FIG. 8A, the waveguide tube 11 bends greatly in the vicinity of the center of the speaker. FIG. 8B shows a cross-sectional shape of the waveguide tube 11 in which the tube outlet is between the speaker center and the upper end, and the bending amount is smaller than that in FIG. FIG. 8C shows the cross-sectional shape of the waveguide tube 11 at the upper end, the bending amount is further smaller, and the tube shape is substantially straight. This is the same as the tube shape at the end of FIG.
The tendency of the bending amount is also shown in FIG. As shown in the figure, the waveguide tube 11 near the center of the speaker is greatly displaced in the lateral direction.

  Next, the operation of the speaker device 1 according to the present embodiment will be described.

  In FIG. 10, a plurality of speaker devices 1 are linearly arranged to form a speaker array. FIG. 10 corresponds to FIG. 14B, and this speaker arrangement is suitable when it is desired to transmit sound far away in a relatively large venue. In such an arrangement, the phase characteristic is preferably a plane (actually a cylindrical surface), which can reduce phase interference.

  Therefore, when the speaker device 1 is arranged linearly as shown in FIG. 10, the adjusting screw 25 is loosened as shown in the upper part of FIG. Thereby, the screw position is moved away from the speaker central axis L, and the tube outlet support member 21 becomes flat. And as FIG. 1 shows, the shape of the tube exit row | line | column 17 becomes a linear form. Therefore, the sound wave surface at the exit of the wave guide unit 9 becomes flat (the curvature is 0 or close to it), and the speaker device 1 functions as a plane wave speaker. Since the phase characteristic is flat, as shown in the portion surrounded by the dotted line in FIG. 10, the crossing of the sound wave surfaces of adjacent speakers is small, and phase interference can be reduced.

  Next, in FIG. 11, the plurality of speaker devices 1 are arranged in an arc shape. This speaker arrangement is suitable for a venue where the depth is relatively small and it is desired to transmit sound over a wide range in the horizontal direction. In such an arrangement, the phase characteristic is preferably a spherical surface, which can reduce phase interference as compared with the case of a plane wave.

  Therefore, when the speaker device 1 is arranged in an arc shape as shown in FIG. 11, the adjustment screw 25 is tightened as shown in the lower part of FIG. 4, and the screw position is brought close to the speaker central axis L. The tube outlet support member 21 is curved in an arc shape (the curvature is increased). And as FIG. 3 shows, the shape of the tube exit row | line | column 17 also becomes circular arc shape. The sound wave surface at the exit of the wave guide portion 9 becomes a spherical surface having the shape of the exit row as it is, and the speaker device 1 functions as a spherical wave speaker. The wavefront shape of the spherical wave is closer to the overall arc formed by the plurality of speaker devices 1 than the plane wave. Compared with the phase shift in the case of the plane wave in FIG. 14C, the spherical wave has a smaller phase shift. Therefore, phase interference can be reduced by making the phase characteristic spherical.

  In the example of FIGS. 10 and 11 described above, three speaker devices 1 are shown, but it goes without saying that the number of speaker devices 1 is not limited to this.

  Next, with reference to FIG. 12, the suitable adjustment of the tube exit row | line | column shape according to speaker arrangement | positioning is demonstrated.

  In FIG. 12, three speaker devices 1 are shown (as described above, the number of speakers is not limited to three). The three speaker devices 1 are directed in different radial directions, and thus the three speaker devices 1 are arranged in an arc shape.

  An angle θ in the figure is an angle formed by two adjacent speaker devices 1. This angle is called a speaker arrangement angle. The speaker arrangement angle θ is equal to the angle formed by the speaker central axes L of the two adjacent speaker devices 1. The speaker arrangement angle θ corresponds to the connection angle of the speaker device 1 (the speakers need only be acoustically connected, so the speakers may not be physically connected, and only two speakers may be arranged. ).

  As shown in the figure, the speaker central axes L of the three speaker devices 1 intersect at an intersection point O. An arc C in the drawing is an arc passing through both ends of each speaker device 1 with the intersection point O as the center. A dotted arc Cs indicates the tube outlet row shape in each speaker device 1. If the circular arc Cs and the circular arc C are concentric circles, the crossing of the sound wave surfaces of two adjacent speaker devices 1 is reduced, and phase interference can be suppressed to be small.

  Here, when the speaker arrangement angle θ changes, the intersection point O moves and the radius of the arc C changes. For example, when the speaker arrangement angle θ increases, the intersection point O approaches the speaker device 1 and the radius of the arc C decreases (the focal point moves forward when the intersection point O is considered as the focal point).

  Therefore, when the speaker arrangement angle θ is determined, the position of the intersection point O is determined, and the radius of the arc C is determined. If the radius of the arc C is determined, the tube outlet row shape (curvature) concentric with the arc C is determined. That is, the speaker arrangement angle θ and the appropriate tube outlet shape (curvature) correspond one-to-one.

  Therefore, in the present embodiment, first, the speaker arrangement is determined in accordance with the installation location. Then, the phase characteristic adjustment mechanism 19 (adjustment screw 25) is operated so that a tube outlet row shape corresponding to the speaker arrangement angle θ is obtained.

  FIG. 13 is a table showing the relationship between the speaker arrangement angle θ and other parameters. k is the curvature of a circular arc Cs (tube outlet row shape) concentric with the circular arc C in FIG. H is the height of the arc apex of the tube outlet row as shown. The standard of the height H is the position of the tube outlet row shape when it is straight (the height H is 0 when the tube outlet shape is straight). B is a screw position of the adjusting screw 25 corresponding to the height H (that is, corresponding to the curvature k). In the illustration, the screw position B is represented by a distance from the speaker central axis L along the tube outlet row direction (direction perpendicular to the speaker central axis L).

  In FIG. 13, the relationship of each parameter is as follows. θ0 (= 0) <θ1 <θ2 <θ3. k0 (= ∞)> k1> k2> k3. H0 (= 0) <H1 <H2 <H3. B0> B1> B2> B3. That is, as the speaker arrangement angle θ increases, the curvature k decreases, the arc vertex height H increases, and the screw position approaches the speaker central axis L. These four parameters correspond one to one.

  When the speaker device 1 is actually used, a correspondence table of speaker arrangement angles and screw positions may be prepared based on FIG. The speaker arrangement angle is obtained, and the screw position corresponding to the speaker arrangement angle is read from the correspondence table. Then, the adjusting screw 25 is operated so as to match the read screw position. Thereby, the tube outlet row shape becomes a shape that approximates the circular arc Cs of FIG. 12, and a shape that provides phase characteristics that can reduce phase interference.

  The speaker device 1 according to the embodiment of the present invention has been described above. According to this Embodiment, the waveguide part 9 is comprised by the several waveguide tube 11 which can be bent and length is equal, and the phase of a tube exit row | line | column becomes equal. The phase characteristic adjusting mechanism 19 adjusts the phase characteristic by changing the shape of the tube outlet row 17. Thereby, the phase characteristics can be adjusted so as to reduce the phase interference in accordance with the speaker arrangement. Therefore, even when the speaker arrangement angle is varied, phase interference can be reduced and acoustic characteristics can be improved.

  Further, according to the present embodiment, the phase characteristic adjusting mechanism 19 makes the phase characteristic planar by making the shape of the tube outlet row 17 straight, and makes the shape of the tube outlet row 17 curved. Make the phase characteristic spherical. With this configuration, one speaker device 1 can function as a plane wave speaker and a spherical wave speaker. The phase characteristics can be switched according to the installation location, and the phase interference can be suitably reduced even if the arrangement angle of the speakers when the plurality of speaker devices 1 are installed is changed.

  Further, according to the present embodiment, the phase characteristic adjusting mechanism 19 includes the tube outlet support member 21 to which the tube outlet portions of the plurality of waveguide tubes 11 are attached, and the tube outlet support along the direction of the tube outlet row 17. And a deformation mechanism 23 for changing the shape of the member 21. With this configuration, the phase characteristics can be adjusted with a simple configuration such as the tube outlet support member 21 and a mechanism for changing the shape thereof.

  Further, according to the present embodiment, the deformation mechanism 23 makes the phase characteristic spherical by curving the tube outlet support member 21. With this configuration, a spherical wave can be generated and the phase characteristics can be adjusted with a simple configuration in which the tube outlet support member 21 is curved.

  Further, according to the present embodiment, the deformation mechanism 23 has the adjusting screw 25 that can be screwed in the direction of the tube outlet row 17 to change the screw position, and the adjusting screw 25 engages with the tube outlet support member 21. The tube outlet support member 21 is deformed by changing the screw position. With this configuration, the shape of the tube outlet support member 21 can be changed with a simple configuration using screws, and the phase characteristics can be adjusted.

  The preferred embodiments of the present invention have been described above. However, the present invention is not limited to the above-described embodiments, and it goes without saying that those skilled in the art can modify the above-described embodiments within the scope of the present invention.

  As described above, the speaker device according to the present invention has an effect that phase interference can be suitably reduced regardless of the speaker arrangement angle when a plurality of speaker devices are installed. Useful as.

It is a figure which shows the speaker apparatus in embodiment of this invention, Comprising: A figure when a phase characteristic is made flat The figure which looked at the speaker apparatus in embodiment of this invention from the front The figure which shows a speaker apparatus when a phase characteristic is made into a spherical surface Diagram showing the configuration of the phase characteristic adjustment mechanism A more detailed perspective view of the speaker device View of the speaker device viewed from the side Top view of speaker device (A) Cross-sectional view of the speaker device cut along line AA (b) Cross-sectional view of the speaker device cut along line EE (c) Cross-sectional view of the speaker device cut along line FF (A) Sectional view of the speaker device cut along line CC (b) Sectional view of the speaker device cut along line DD The figure which shows adjustment of the phase characteristic suitable when a plurality of speaker devices are arranged in a straight line The figure which shows adjustment of the phase characteristic suitable when a several speaker apparatus is arrange | positioned at circular arc shape The figure which shows about appropriate adjustment of the tube exit line shape according to speaker arrangement The figure which shows the relationship between the speaker arrangement angle and other parameters (A) A diagram in which a plurality of spherical wave speakers are arranged in a straight line (b) A diagram in which a plurality of plane wave speakers are arranged in a straight line (c) A diagram in which a plurality of plane wave speakers are arranged in an arc shape

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Speaker apparatus 3 Speaker driver 5 Horn part 7 Flare part 9 Wave guide part 11 Wave guide tube 13 Tube inlet 15 Tube outlet 17 Tube outlet row | line | column 19 Phase characteristic adjustment mechanism 21 Tube outlet support member 23 Deformation mechanism 25 Adjustment screw L Speaker center axis

Claims (5)

A speaker driver, and a horn connected to the speaker driver;
The horn part has a flare part and a wave guide part that guides sound from the speaker driver to the flare part,
The waveguide section is
A plurality of waveguide tubes that are bendable and equal in length and are arranged such that the tube outlets on the flare side form a tube outlet row;
A phase characteristic adjusting mechanism that adjusts the phase characteristic by changing the shape of the tube outlet row formed by the tube outlets of the plurality of waveguide tubes;
A speaker device comprising:   The phase characteristic adjusting mechanism makes the phase characteristic planar by making the shape of the tube outlet row straight, and makes the phase characteristic spherical by making the shape of the tube outlet row curved. The speaker device according to claim 1. The phase characteristic adjusting mechanism is
A tube outlet support member to which tube outlet portions of the plurality of waveguide tubes are attached;
A deformation mechanism for changing the shape of the tube outlet support member along the direction of the tube outlet row;
The speaker device according to claim 1, further comprising:   The speaker device according to claim 3, wherein the deformation mechanism makes the phase characteristic spherical by curving the tube outlet support member.   The deformation mechanism has at least one adjustment screw that is screwed in the direction of the tube outlet row to change the screw position, and the adjustment screw engages with the tube outlet support member to change the screw position. The speaker device according to claim 4, wherein the tube outlet support member is deformed by the above.

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