JPH07129182A - Acoustic panel - Google Patents

Abstract

PURPOSE:To form an intra-room space having good acoustic effect without impairing the comform as a dwelling space by structuring so that the acoustic panel for the wall surface constituting an acoustic room is equipped with a sound-isolating back face and an intra-room face consisting of a specific reflection surface and sound absorptive surface. CONSTITUTION:The back face plate 2 of an acoustic panel 1 is made from a material having a high sound isolativeness equipped with a soundproof effect from the neighboring room or from the outside, wherein a triangular part of such a constitution that the bottom of the front face is the bottom of triangle and the top center is the apex is made from a reflecting plate 3 while the remaining parts are embodied as sound absorptive surfaces 4, 5 filled with a sound-absorbing substance. A speaker unit 6 is installed in the center of this panel 1, and a speaker box is configured with the triangular reflecting plate 3 provided in the lower part with an opening 7 for bass range emission, partitioning plates 8, 9, and a back face plate 2. The drive point of this speaker unit 6 is set at 1/2 of the tapered portion overall length of the speaker box embodied in a tapered tubular structure, and the open area of the opening 7 is made 40% of the section area of the taper open end at the bottom, and thereby low frequency sounds can be emitted efficiently.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention, when reproducing music or video software indoors, vividly reproduces indirect sounds and sound effects contained in the software to create a sound field space full of realism. The present invention relates to an acoustic panel for adjusting a room sound field space that constitutes a sound room.

[0002]

2. Description of the Related Art When music or video software is played back in a room for viewing, it is possible to enhance the sense of realism by adding reverberation sound and sound effects to the playback sound. Furthermore, in addition to the main speaker, a surround speaker is placed around the listener to reproduce reverberant sounds and sound effects, thereby further enhancing the presence effect. For that purpose, it is important that the acoustic condition in the room, that is, the frequency characteristic of the reverberation time is flat, there is no standing wave peculiar to the room, and the radiation sound is sufficiently diffused.

[0003]

However, conventionally, as a measure for adjusting the reverberation condition in the room or removing standing waves, the room shape is irregularly shaped, and the diffuser plate / reflector plate / sound absorbing plate is used for the wall / ceiling surface. The method of arranging it appropriately was adopted. For this reason, the room becomes small, and due to the limited floor area, only a small wall-mounted speaker can be used as a surround sound source, and there is a drawback that the bass reproduction capability is insufficient and the presence is poor. Placing a large loudspeaker system with low-frequency sound reproduction in the vicinity of the room enhances the realistic effect, but has the drawback of reducing the living space.

Therefore, according to the present invention, a sounding and articulating function is used to form a reverberant indoor space without sacrificing the living space inside the room, and a high-quality low-pitched sound for reproducing powerful and realistic surround sound is provided. The present invention is intended to provide a space-saving acoustic panel having reproduction capability.

[0005]

SUMMARY OF THE INVENTION The present invention arranges an integral wall panel having two internal structures, a sound reflecting portion and a sound absorbing portion, around a surround room.
When this wall panel also serves as a sound source for surround sound reproduction, the inside of the part that reflects sound is used as an acoustic box, and a speaker unit that radiates medium and high frequencies directly into the room is attached to the reflective wall. Then, from the back surface of the diaphragm of the speaker unit, the sound wave radiated into the acoustic box is radiated from the other opening through the sound path of the low frequency resonance structure, thereby enhancing the low frequency sound. It is intended to indirectly radiate indoors.

[0006]

[Function] The outer portion of the wall panel arranged around the sound room has a sound insulation effect for shielding external noise.
Furthermore, the wall surface on the indoor side has an articulation effect that adjusts the sound and sound pressure distribution in the room by the action of reflection, sound absorption, and diffusion. Further, when the reflection wall surface has a function of radiating surround sound, the direct radiation sound from the speaker attached to the reflection wall surface is responsible for sound reproduction of middle and high frequencies. Then, the backside sound pressure is resonated at a low frequency by the internal sound path to be enhanced, and the indirect radiated sound radiated from the opening is responsible for the sound reproduction of the low frequency range.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An acoustic panel according to the present invention will be described in detail below with reference to the drawings. 1A and 1B are structural views showing an embodiment of an acoustic panel unit according to the present invention. FIG. 1A is a perspective view and FIG. 1B is a side sectional view. Here, an example is shown in which one unit of the acoustic panel has the functions of sound insulation, sound absorption, reflection, diffusion, and surround sound emission.

The back plate 2 of the acoustic panel 1 is made of a material having a high sound insulating property that has a soundproof effect with the adjacent room or the outside. As for the front surface, a triangular portion having a bottom at the bottom and a top center at the apex is a reflecting plate 3, and the remaining portions are sound absorbing surfaces 4 and 5 filled with a sound absorbing material. A speaker unit 6 is attached to the center of the acoustic panel 1, and a triangular reflector 3 having an opening 7 for low-frequency sound emission below, partition plates 8 and 9 and a rear plate 2 constitute a speaker box. .

This means that the upper end 10 is closed and the lower 2
Speaker with a tapered tube structure with two other ends 11 open
It becomes a box. The drive point of the speaker unit 6 is set to half the total length of the taper portion, and the opening area of the opening 7 is set to 40% of the cross-sectional area of the bottom taper opening end.
As a result, the resonance frequency is determined by the length of the tapered pipe, and low frequency sound is efficiently radiated. Therefore, the speaker
Even if the amplitude of the diaphragm of the unit 6 is small, high-quality low-pitched sound with high sound pressure is reproduced from the opening 7. That is, by placing the drive sound source at a position of one-half of the total taper length, it is possible to remove the excitation modes of the harmonics other than the fundamental wave, especially the third harmonic wave, and to reproduce heavy bass without distortion. Is possible.

FIG. 2 shows an example of sound absorption coefficient-frequency characteristics of the reflection plate 3 and the sound absorbing surfaces 4 and 5 of FIG. 1 (a). As shown in the figure, it is possible to easily realize a flat reverberation characteristic in the room by providing almost perfect reflection and sound absorption performance in the midrange and above.

FIG. 3 shows an embodiment in the sound room. FIG. 3 shows a development view of a construction example of a sound room for enjoying a home theater assembled by using the acoustic panel of the present invention. Here, the acoustic panel of FIG. 1 is constructed by assembling it on the wall surface in a prefabricated manner, and it can be easily constructed as a sound room in a newly built room or an existing room.

The listener who entered the room through the soundproof door 25 sits on the sofa 17 in the room, and the left and right main speakers 13 and 14 installed on the front wall together with the video screen projected from the video projector 16 to the screen 12. Main acoustic signal reproduction by the central speaker 15 and six surround-speaker-equipped panels 20, 21, 22, 23, 26, 27 out of the 15 acoustic panels arranged on the left and right side walls 18 and 19 and the rear wall 24. This enables the reproduction of surround sound signals rich in bass.

A sound room using the acoustic panel 1 is an ideal surround sound theater space by a simple means of arranging and assembling panel units of the same standard on the wall without sacrificing the living space volume. Can be realized. Moreover, because it is made of an acoustic material that is completely reflective and completely absorbing sound, it is easy to realize a flat reverberation characteristic, the sound is evenly diffused, and a natural sound field with beautiful resonance can be created. In addition, the distortion-free deep bass utilizing the tapered bass resonance structure inside the wall unit enhances the surround sound effect and creates a powerful natural presence effect.

The acoustic panel 1 does not need to be prepared in various types and can be standardized in size, so that it can be easily mass-produced and the cost can be reduced. Conventionally, in order to obtain the same effect, it is necessary to dispose a large-sized speaker in the periphery, which causes inconveniences such as troublesome wiring, poor appearance, and a small living area. According to the present invention, it is possible to enjoy music and image software to the fullest in a spacious and spacious room, surrounded by a surround sound reproduction sound field filled with the power of heavy bass and a realistic sensation.

[0015]

As described above, according to the present invention, a surround sound reproduction capable of reproducing a soundproof function, a sound absorbing function, a reflecting function, a diffusing function, and a high-quality deep bass sound by arranging a panel unit in the wall thickness is provided. It can have both functions.

[Brief description of drawings]

1A and 1B are schematic configuration diagrams showing an internal structure of an embodiment of the present invention.

FIG. 2 is a characteristic diagram showing an example of sound absorption characteristics of an acoustic panel surface used in the present invention.

FIG. 3 is a development view showing an embodiment of a sound room using the acoustic panel of the present invention.

[Explanation of symbols]

 1 Acoustic Panel 2 Back Plate 3 Reflector 4 Sound Absorbing Surface 5 Sound Absorbing Surface 6 Speaker Unit 7 Opening 8 Partition Plate 9 Partition Plate 10 End 11 Other End 12 Screen 13 Main Speaker 14 Main Speaker 15 Central Speaker 16 Video Projector 17 Sofa 18 Side wall 19 Side wall 20, 21, 22, 23 Panel with surround speaker 24 Rear wall 25 Door 26, 27 Panel with surround speaker

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Internal reference number FI Technical display location G10K 15/00 H04R 5/02 J 9381-5H G10K 15/00 M E04B 1/99 Z H04R 1 / 02 101 E

Claims (4)

[Claims] 1. An acoustic panel on a wall forming an acoustic chamber, the acoustic panel comprising a back surface made of a sound-insulating material, and a sound reflecting surface facing the back surface with a distance corresponding to the wall thickness. An acoustic panel having an interior surface configured by a sound absorbing surface. 2. A sound path having a low-frequency resonance structure, in which a speaker is attached to a surface that reflects sound to directly radiate sound, and sound waves radiated from a back surface of a diaphragm of the speaker to an acoustic box formed inside an acoustic panel are arranged. The acoustic panel according to claim 1, further comprising: an opening portion for indirectly radiating a low-frequency signal via the aperture. 3. A triangular portion surrounded by a substantially central portion of one side of the acoustic panel and both end portions of the side opposite to the one side is a reflecting surface, and the other portion is a sound absorbing surface. The acoustic panel according to claim 1 or 2, characterized in that: 4. A radiating opening is defined by setting a drive point of the speaker at a position approximately ½ of a line orthogonal to the base from the apex of the reflecting surface, and having an opening area of approximately 40% of the cross-sectional area of the base near the base. The acoustic panel according to claim 3, wherein the acoustic panel is provided.