JPH08294192A - Speaker system - Google Patents

Abstract

PURPOSE: To eliminate adverse effects of standing waves and back pressure, etc., without using sound absorbing material and to obtain tone quality with high quality over a wide band by making a speaker system constituted so that a speaker unit is mounted on a baffle surface and opposed side plates with each other are not made parallel with each other. CONSTITUTION: A thin type speaker unit 2 of a full range for which a repulsion magnetic circuit is used is mounted on the baffle 1a of a guitar type cabinet 1. The material of this cabinet is composed of the same wood as that of a guitar. The shape imitating the guitar shape of the baffle 1a is the shape in which the left side shape and the right side shape are different or not a linear symmetry shape from a vertical line point of view which is drawn on the center of the mounting part of a speaker unit 2. Thus, in order to make the side plates of the cabinet 1 so as not to be parallel with each other, the shape of the material in which the contents of the central body of the guitar is hollowed out is used for the cabinet 1, for instance, and the speaker unit 2 is arranged at the baffle 1a.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a thin speaker system which is widely used as a speaker for wall mounting.

[0002]

2. Description of the Related Art Conventionally used thin speakers are often used for wall hangings, and it is difficult to make a large cabinet volume, so that low frequencies tend to be insufficient, and FIG. As shown in (a) and (b), the cabinet 11 has a simple shape such as a square shape or a round shape, and generally has a volume-less design. In the figure, 12 is a speaker unit.

[0003]

In the conventional thin loudspeaker, the facing surfaces inside the cabinet 11 are often parallel to each other, and a standing wave which is said to adversely affect acoustically is generated. Cheap. Further, particularly in the case of a thin speaker, the baffle 11a and the back plate 11c are close to each other, so that they are easily affected by back pressure.

In order to cancel these standing waves and back pressure, a sound absorbing material 15 is generally provided, but there is a problem that it is difficult to put the sound absorbing material in a thin cabinet because the capacity is small. In the case of a 2-way system, the tweeter 13 is often attached to the baffle 11a due to the nature of a thin speaker, so that the sound field is developed in the front direction with respect to the speaker unit 12.
As a thin speaker for wall hanging, which is often used for BGM, etc., it is not satisfactory in terms of sound field.

Therefore, an object of the present invention is to solve the above-mentioned drawbacks of the conventional thin speaker, to avoid the adverse effects such as standing waves and back pressure without using a sound absorbing material, and to cover a wide band. An object of the present invention is to provide a speaker system that can obtain high-quality sound and has an eccentric design image.

[0006]

In order to solve this problem, the present invention is a so-called flat speaker provided with a cabinet having a depth sufficiently smaller than the size of the baffle surface, and a speaker unit is provided on the baffle surface. The side plates facing each other are not parallel to each other while being attached.

In this case, for example, the cabinet can be shaped like a guitar, and the baffle can be axisymmetric with respect to the speaker unit mounting portion, or the baffle can have a wavy curved surface. Or, a treble reproduction speaker unit (tweeter) is arranged on the side surface of the cabinet, and an acoustic reflector is arranged above the treble reproduction speaker unit to form an omnidirectional reproduction unit. I'm dying.

[0008]

In order to prevent the side plates of the cabinet from being parallel to each other, for example, the cabinet has a shape in which the inside of the body of the guitar is hollowed out, and the speaker unit is the baffle 11a like the conventional speaker. To place.

According to this structure, the side surfaces have a complicated shape, and the parallel portions of the opposing surfaces can be reduced as much as possible, and standing waves are less likely to occur. Also, by making the baffle flat rather than flat, the part where the baffle and the back plate are in parallel is reduced, the standing waves are reduced, and the effect of the horn can be expected on the baffle surface. Is even more preferable.

Further, when the 2 Way system is adopted,
By arranging the tweeter on the side, a speaker system with a wide sound field is obtained. Furthermore, by installing an acoustic reflector (reflector) above the tweeter, the sound field is further expanded.

[0011]

EXAMPLE An example of a speaker system according to the present invention will be described. As shown in FIG. 1, a full-range thin speaker unit 2 using a repulsive magnetic circuit is attached to a baffle 1 a of a guitar-type cabinet 1. Cabinet 1
The material is made of the same wood as the guitar. Also,
The shape of the baffle 1a that imitates the shape of a guitar has a shape in which the shape on the left side and the shape on the right side are different, that is, non-axisymmetric, when a vertical line is drawn at the center of the mounting portion of the speaker unit 2 Has become.

FIG. 6 shows a guitar-type thin speaker A based on the embodiment of FIG. 1 and an A3 having the same volume and the same size as the depth.
6A and 6B show frequency characteristics of the rectangular thin speaker B having a size baffle, FIG. 6A shows frequency characteristics of the thin speaker A, and FIG. 6B shows frequency characteristics of the thin speaker B.

The same speaker unit 2 is used for both, and no sound absorbing material is used for both. It is found that the frequency characteristic of the guitar-type speaker A is extremely flat as compared with the rectangular thin speaker B where the adverse effect of the standing wave is severe, and that it is not necessary to use a sound absorbing material.

FIG. 2 shows another embodiment, in which the baffle 1a is not formed in a flat plate shape, but a circular or elliptical annular raised portion 1d is formed around the speaker unit 2.
With such a shape, not only the standing wave and back pressure are canceled, but also the sound radiation can be smoothed. Although it is expensive to raise the surface of the baffle, in order to reduce the cost, it is necessary to make only the inner surface side of the baffle 1a or the back plate 1c into a flow surface so that the baffle 1a and the back plate 1c are not parallel. Good.

FIG. 3 shows an example in which a dome type tweeter 3 is arranged on the side surface 1b of the cabinet 1. A speaker system having a wide sound field, which is ideal as a thin speaker system for wall mounting which is often used for BGM, is shown. Can be configured.

FIG. 4 shows a small reflector 4 (acoustic reflector) on the tweeter 3 in order to make the sound field omnidirectional.
This is an example in which the sound field is installed, and thus a further expansion of the sound field can be obtained. In this way, when the tweeter 3 is arranged on the side surface and the reflector 4 is arranged above it,
Since it does not protrude in a plane, it can be easily attached to a wall or the like without any discomfort, and it is a thin speaker system that has a wide band and a wide sound field and is acoustically excellent without compromising the characteristics of its original thinness. Can be configured.

Although the above embodiment is an example in which the cabinet 1 is formed in a guitar shape, the shape of the cabinet 1 can be arbitrarily changed as long as the above-mentioned standing wave or the like is not easily generated.

[0018]

According to the speaker system of the present invention, it is possible to overcome the disadvantage that the speaker system is thin and has a small volume, which is less likely to generate a standing wave without using a sound absorbing material. , Can be played back without damaging the original sound of the speaker unit. Further, since no sound absorbing material is used, the cost can be reduced and the work efficiency can be improved.

[Brief description of drawings]

FIG. 1 shows an embodiment of a speaker system according to the present invention, in which (a) is a front view and (b) is a sectional view.

2A and 2B show an example in which a raised portion is formed on a baffle as another embodiment, FIG. 2A is a front view, and FIG. 2B is a sectional view.

FIG. 3 is a front view showing an example in which a tweeter is arranged on a side surface.

FIG. 4 shows an example in which a reflector is installed on an upper part of a tweeter arranged on a side surface, (a) is a front view, and (b) is a sectional view.

FIG. 5 shows an example of a conventional thin speaker system,
(A) is a perspective view of a square type, (b) is a perspective view of a round type.

6 is a frequency characteristic in which the frequency characteristics of a guitar type thin speaker A based on the embodiment of FIG. 1 and a conventional square type thin speaker B are compared. FIG.
(B) shows the respective frequency characteristics of the thin speaker B.

[Explanation of symbols]

 1 Cabinet 1a Baffle 1b Side of cabinet 1c Back plate 1d Raised part 2 Speaker unit 3 Tweeter 4 Reflector

Claims (6)

[Claims] 1. A so-called flat speaker including a cabinet having a depth sufficiently smaller than the size of the baffle surface, wherein a speaker unit is attached to the baffle surface and side plates facing each other are not parallel to each other. Characteristic speaker system. 2. The speaker system according to claim 1, wherein the cabinet has a baffle shaped like a guitar. 3. The speaker system according to claim 1, wherein the baffle of the cabinet has a non-axisymmetric shape with respect to the speaker unit mounting portion. 4. The speaker system according to claim 1, wherein the baffle has a curved surface such as a wavy shape. 5. The speaker system according to claim 1, wherein a speaker unit for reproducing high-pitched sound is arranged on a side surface of the cabinet. 6. The speaker system according to claim 5, wherein an omnidirectional reproducing unit is configured by disposing an acoustic reflector on the upper part of the high-pitched sound reproducing speaker unit.