JPH08126089A - Sound reproducing device - Google Patents

Abstract

PURPOSE: To provide a sound reproducing device in which localization is obtained around the height of ears and the feeling of sound field is not lost even when the device is installed on a floor or on a ceiling so as not to disturb sight. CONSTITUTION: The speaker system is made up of speaker units 3, 4 and a case 2 incorporating the speaker units 3, 4 and in the sound reproducing device 1 comprising at least two speaker units 3, 4 reproducing a same frequency band and at least one case 2 or over, an angle of a horizontal plane being a sound wave radiation plane for the remaining speaker unit capable of reproducing sound of the same frequency band with respect to at least one speaker unit or over is selected to be 120 deg. or over and 180 deg. or less, preferably 155 deg. or over and 175 deg. or less and the unit is installed on a floor F or a ceiling while its rear side is directed to the floor or the ceiling face.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sound reproducing device, and more particularly to a sound reproducing device for effectively utilizing an indoor space and improving a sound field.

[0002]

2. Description of the Related Art FIG. 7 shows a speaker unit 3 in a housing 30.
1 shows a conventional speaker system 34 in which 1 and 32 are arranged, the speaker units 31 and 32 are installed so as to face the listener M, and the position of the sound image is approximately the point X 35. Therefore, in order to localize the sound image near the height of the listener M's ear 33, the speaker system 34 needs a certain height. Therefore, when the image screen 36 is installed in the rear, the speaker system 34 may prevent the view as shown in the figure. In addition, as shown in FIG. 8, the system 3 is placed on the floor facing upward.
In this case, the position 38 of the sound image is the position of the speaker unit, and the field of view of the screen 36 is not obstructed, but the position tends to be extremely lower than the height of the ear 33. .

[0003]

In the conventional speaker system in which the speaker unit faces the listener, there is a drawback of obstructing the field of view when a screen for video is installed. When placed on both sides of the screen so as not to obstruct the field of view, there was a drawback that the sound image localization became too wide. Also, in the system that was placed on the floor, the sound image was localized toward the bottom, and no sound field was obtained.

Therefore, an object of the present invention is to achieve sound reproduction in which localization is obtained near the height of the ear and the sound field feeling is not impaired even when it is placed on the floor or the ceiling so as not to obstruct the view. To provide a device.

[0005]

In order to achieve the above object, in the present invention, one speaker system is equipped with at least two or more speaker units capable of reproducing the same band, and the direction of sound emission of each speaker is adjusted. The central axes were set to intersect at one point, and a sound image was formed at the focal point of the synthesized sound.

At this time, the angle formed by the horizontal plane, which is the sound wave emitting surface of the speaker unit capable of reproducing the remaining same band with respect to at least one or more speaker units, is 12
0 to 180 degrees, preferably 155 to 175
Set it to be less than or equal to degrees. That is, the direct sound from each speaker to the listening position is 45 degrees or more from the axis, preferably 6 degrees.
The inclination of each speaker is adjusted so as to be offset by 0 degree or more so that the sound image localization is not pulled by the direct sound. At the time of installation, make sure that the back side faces the floor or ceiling.

[0007]

Although a method of forming a sound image with two or more speakers has been conventionally used, the present invention is an application of this method. When the speaker is attached to a low position on the floor or the ceiling by the following operation. However, the sound image can be localized near the height of the ear when seated.

The speaker has two or more speakers capable of reproducing the same band for each channel and is attached to the housing.
In each channel, two or more speakers are mounted so that the sound emission axes intersect at one location. At the intersection, the sounds emitted from the speakers strengthen each other to create a space with higher sound pressure than the surrounding space. Therefore, if the intersection is set near the ear height, the sound image localization can be obtained at a position almost at the ear height regardless of where the speaker is.

By the way, at the listening position, there is a tendency that the sound that arrives earlier has its localization pulled by the preceding sound effect of the sound, but if there is a certain level difference, the localization is pulled to the higher level. There is also a tendency to be. In the present invention, the latter principle is applied to set the directivity angle of each speaker to the listening position in the radiation direction of each speaker so that the level of the direct sound becomes lower than that of the synthetic sound so as not to pull the localization. It should be tilted 30 degrees or more from the axial direction. As a result, even if the direct sound from the speaker reaches the listening position before the synthesized sound, the localization is maintained at the height of the ear of the listener without alienating the sound image localization of the synthesized sound.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment according to the present invention will be described with reference to FIGS. FIG. 1 is a side view of a sound reproducing apparatus according to an embodiment of the present invention in an installed state, and FIG. 2 is an electric circuit diagram for driving the sound reproducing apparatus of FIG. FIG. 3 shows an embodiment according to claim 5, FIG. 4 shows an embodiment according to claim 6, FIG. 5 shows an embodiment according to claim 8, and FIG. It shows an embodiment according to claim 9.

The embodiment shown in FIG. 1 is a case where the sound reproducing device 1 is placed on the floor. The sound reproducing device 1 has two housings 2
Two speaker units 3 and 4 are attached. Speaker units 3 and 4 have a caliber of 1 for full range reproduction
It is a unit of 6 cm, and is attached so that its rear surface faces the floor surface F, and the angle A formed by the mounting surface is 165 degrees, and is about 1 m from the floor surface on the central axis of the housing. The speaker units 3 and 4 are set so as to be set apart from each other by about 25 cm at the center position so as to connect the focal point 5. Then, the focal point 5 becomes a virtual sound source.

Further, the path as a so-called direct sound from the speaker units 3 and 4 to the listening position 6 which is the position of the listener M's ear is the center axis of the speaker unit 3 with respect to the center axis of the speaker units 3 and 4. The angle B between and is about 6
The angle C formed by the central axis of the speaker unit 4 is 0 degree, and is inclined by about 75 degrees.

Therefore, the level of the direct sound is lower than 6 dB in the band of several kHz, which greatly contributes to the localization, compared with the virtual sound source on the central axis, but the localization of the virtual sound source is largely alienated. Instead, the sound source is localized at almost the height of the ears when actually listening. As is clear from the figure, the field of view of the screen 36 is not obstructed at this time.

In FIG. 2, reference numeral 7 is a reproducing device for reproducing a CD, LD, etc., 8 and 9 are control devices for adjusting the level, delay time, phase and frequency characteristics, and 10 and 11 are power amplifiers. The signal output from the reproduction device 7 passes through the control devices 8 and 9, where the level, delay time, phase and frequency characteristics are finely adjusted by the sense of hearing before the power amplifier 1
It is amplified by 0 and 11 to drive the speakers 3 and 4.
That is, the control device can be used to make adjustments so as to obtain optimum sound image localization by taking account of acoustic conditions that differ depending on the room. In the example of FIG. 2, the power amplifiers 10 and 11 and the control devices 8 and 9 are installed outside the housing 2 of the speaker system, but they may be built in the housing 2. By doing so, the space factor is also improved.

FIG. 3 shows each speaker unit in which the housings 12 and 13 have the same radiation surface (here, the speaker unit 14 is provided in the housing 12 and the speaker unit 1 is provided in the housing 13).
5 are attached respectively), and the divided casings 12 and 13 are hinges 16
It is connected by opening and closing by each unit 14,
The angle formed by the radiating surfaces of 15 can be freely changed, and finally, it can be closed in the direction of the arrow so that it can be easily carried and stored.

FIG. 4 shows an example in which the mounting surface of each speaker unit is tilted in a direction perpendicular to the listening direction in addition to the listening direction in the first embodiment.
7 has a V-shape at the center, and the front side 18 is lower than the back side 19 and is inclined downward as a whole. When the speaker system according to this embodiment is used in stereo, the left and right channel speaker systems are installed so that the front sides are inside, so that the sound radiation is concentrated inside, and the center localization becomes clearer. The effect is obtained.

FIG. 5 shows an example in which four speaker units are used, and the center axes of the respective units 20 to 23 in the radial direction are set to focus at the same point 24. In this case, A larger sound pressure is generated at the focal point 24, and the localization becomes clearer.

FIG. 6 shows the sound reproduction device 1 of the first embodiment with a ceiling 2
5 is shown, and a spot illumination 26 is built in the center of the housing 2. By doing this, when you are playing a projector etc. and lighting in the room is dark,
It can also be used as a normal mood lighting, and can be used as a speaker system by performing appropriate light reflection processing on the speaker unit mounting surface 27 (baffle surface) and the speaker unit diaphragm surfaces 28 and 29. It can be installed and the brightness of the lighting can be changed, and it can be used as lighting with a high interior effect. In this case, if the baffle surface or the diaphragm of the speaker unit is processed so as to reflect light, the interior effect is further enhanced.

[0019]

According to the sound reproducing apparatus of the present invention, one speaker system is equipped with at least two speaker units capable of reproducing the same band, and the central axes of the sound emission directions of the respective speakers intersect at one point. Is set so that a sound image can be formed at the focal point position of the synthesized sound, and further, the sound image localization is not pulled by the direct sound, and the speaker system is installed on the floor or on the ceiling. Since the rear side of the speaker unit faces the floor or ceiling, it can be installed without protruding too much from the floor or ceiling, and the sound image localization can be obtained at the ear height of the listener, so the view of the screen etc. is blocked. Not,
It is possible to provide an excellent AV speaker system.

[Brief description of drawings]

FIG. 1 is a side view of an installed state showing an embodiment of a sound reproducing device according to the present invention.

FIG. 2 is an electric circuit diagram for driving the sound reproducing device of FIG.

FIG. 3 is a side view showing an example in which the housing is divided and the housing is openably and closably connected.

FIG. 4 is a perspective view showing another configuration example of the inclined surface of the housing.

FIG. 5 is a side view showing an embodiment in which four speaker units are used.

FIG. 6 is a side view showing an example in which a sound reproducing device with built-in lighting is attached to a ceiling.

FIG. 7 is a side view showing an installation state of a conventional vertical speaker system.

FIG. 8 is a side view showing a conventional floor-standing type speaker system.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 sound reproduction device 2 housing 3,4 speaker unit 5 focus 6 listening position 7 reproduction device 8,9 control circuit 16 hinge 25 ceiling 26 lighting M listener

Claims (12)

[Claims] 1. A speaker system comprising a speaker unit and a housing incorporating the speaker unit, the speaker system comprising at least two or more speaker units capable of reproducing the same band and at least one or more housings. The horizontal plane, which is the sound wave emitting surface of the speaker unit capable of reproducing the remaining same band with respect to at least one or more speaker units, has an angle of 120 to 180 degrees, preferably 155 to 175 degrees. The sound reproducing device is set so that the rear surface side faces the floor surface or the ceiling surface. 2. The sound reproducing device according to claim 1, wherein the speaker units are driven in the same phase. 3. The speaker units on the same plane are driven in the same phase, and the speaker units on the other plane are driven by the controller by adjusting the level, delay time, phase and frequency characteristics. The sound reproducing device according to claim 1. 4. The sound reproducing device according to claim 1, wherein each of the speaker units is driven by the control device by adjusting the level, delay time, phase and frequency characteristics. 5. The housing is divided into planes on which the speakers are mounted and is openably and closably connected to each other, and the angle formed by the speaker mounting surfaces of the respective housings can be arbitrarily adjusted. The sound reproducing apparatus according to claim 1, wherein the sound reproducing apparatus is a sound reproducing apparatus. 6. The sound reproducing apparatus according to claim 1, wherein a mounting surface of the speaker unit of the housing is inclined inward or outward as a whole. 7. A housing is provided for each speaker unit,
The sound reproducing device according to claim 1, wherein the sound reproducing devices are connected so that they can be set at arbitrary angles. 8. The sound reproducing device according to claim 1, wherein the central axes of the speaker units are set so as to focus at the same position in at least two or more combinations. 9. The sound reproducing device according to claim 1, wherein a lighting device is built in the housing. 10. The sound reproducing device according to claim 3, wherein a power amplifier and a control device are incorporated in the housing. 11. The sound reproducing apparatus according to claim 5, wherein the housing is configured to be foldable with the radiation surface of the speaker unit inside. 12. The sound reproducing device according to claim 9, wherein the baffle surface of the speaker system and the diaphragm of the speaker unit are treated to reflect light.