Indoor structure having an audio system

Abstract

To provide an indoor structure which can enhance a function of sound in an indoor space.SOLUTION: An acoustic system 15 arranged in an indoor structure constituting an indoor space surrounded with a wall part, a floor part and a ceiling part includes a first speaker 20 and a second speaker 30, which are composed of vibrators arranged on one face of a wall material 11a and a face material on at least one of the wall part, the floor part and the ceiling part. The plurality of speakers includes a plurality of types different in suitable sound ranges.SELECTED DRAWING: Figure 3

Description

Technical Field

[0001] The present invention relates to an indoor structure having an acoustic system.

Background Art

[0002] For example, Patent Document 1 discloses a diaphragm for a planar speaker that generates vibrations in a plate (panel) using a magnetic coil, a piezoelectric vibrator, etc., and generates music and sound, and a planar speaker using this diaphragm.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] By using a planar speaker provided with a vibrator on a plate material that partitions an indoor space such as a wall portion, a floor portion, a ceiling portion, etc., the indoor space can be configured without being visually recognized as a speaker, so that it is possible to improve the effective use of the space and the appearance. However, in the prior art, in a space where a plurality of people gather such as a conference room, a store, a workplace, etc., and a personal space such as a bedroom or a living room in a house (sometimes collectively referred to as an "indoor space"), from the viewpoints of convenience, comfort, functionality, and preference, etc. (sometimes collectively referred to as the "function of the indoor space"), it cannot necessarily be said that it is sufficient to configure the entire indoor space with a planar speaker.

[0005] For example, taking Patent Document 1 as an example, it can be seen that conventional planar speakers are inferior to ordinary speakers in terms of sound quality such as sound range, and planar speakers are particularly inferior in reproducing high frequencies. That is, there are also problems such as the expansion of the reproduction sound range in planar speakers, and it cannot be said that the function of the indoor space is high. In Patent Document 1, in order to realize a planar speaker with improved sound quality such as sound range, the honeycomb core of the panel (diaphragm) is composed of an organic fiber non-woven fabric, and both ends thereof are wrapped with a sheet made of a lightweight and high-rigidity material component of a glass woven fabric base epoxy resin. However, even such a technology was not sufficient from the viewpoint of enhancing the function of the indoor space.

[0006] Therefore, an object of the present disclosure is to provide an indoor structure capable of enhancing the function of sound in an indoor space.

Means for Solving the Problems

[0007] A first aspect of the present disclosure is an indoor structure that constitutes an indoor space surrounded by a wall portion, a floor portion, and a ceiling portion, wherein an acoustic system is arranged in the indoor structure, and the acoustic system includes at least one of the wall portion, the floor portion, and the ceiling portion. A plurality of speakers composed of a face material and a vibrator arranged on one surface of the face material, and the plurality of speakers include a plurality of types having different suitable sound ranges.

[0008] In the first aspect, at least one type of the plurality of types of speakers may include a honeycomb core in the face material.

[0009] A second aspect of the present disclosure is an indoor structure that constitutes an indoor space surrounded by a wall portion, a floor portion, and a ceiling portion, wherein an acoustic system is arranged in the indoor structure, and the acoustic system includes at least one of the wall portion, the floor portion, and the ceiling portion. A speaker composed of a face material and a vibrator arranged on one surface of the face material, and the speaker includes a plurality of regions having different suitable sound ranges.

[0010] In the second aspect, at least one region of the speaker may include a honeycomb core in the facing material.

[0011] In the second aspect, at least two regions of the speaker may include a honeycomb core in the facing material, and the cell density of the honeycomb core in one region may be different from the cell density of the honeycomb core in another region.

[0012] A third aspect of the present disclosure is an indoor structure that constitutes an indoor space surrounded by a wall portion, a floor portion, and a ceiling portion, wherein an acoustic system is arranged in the indoor structure, and the acoustic system includes a plurality of speakers composed of a facing material and a vibrator arranged on one surface of the facing material on at least one of the wall portion, the floor portion, and the ceiling portion, and the plurality of speakers include a plurality of types with different sound propagation directions.

[0013] In the third aspect, the plurality of speakers may include a honeycomb core in the facing material, and may be configured such that the axial directions of the cells of the honeycomb core are different so that the sound propagation directions are different.

[0014] A fourth aspect of the present disclosure is an indoor structure that constitutes an indoor space surrounded by a wall portion, a floor portion, and a ceiling portion, wherein an acoustic system is arranged in the indoor structure, and the acoustic system includes a speaker composed of a facing material and a vibrator arranged on one surface of the facing material on at least one of the wall portion, the floor portion, and the ceiling portion, and the speaker includes a plurality of regions with different sound propagation directions.

[0015] In the fourth aspect, the speaker may include a honeycomb core in the facing material, and may be configured such that the axial directions of the cells of the honeycomb core are different in the plurality of regions so that the sound propagation directions are different.

Advantages of the Invention

[0016] According to the present disclosure, an indoor structure capable of enhancing the function of sound in an indoor space is provided.

Brief Description of the Drawings

[0017]

Figure 1

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Figure 10

Figure 11

DETAILED DESCRIPTION OF THE INVENTION

[0018] Hereinafter, each embodiment will be described with reference to the drawings. The present invention is not limited to these embodiments. Note that the size and shape of each member shown in the drawings may be exaggerated or deformed from the viewpoint of ease of understanding. Also, for ease of viewing, the description of repeated reference numerals may be omitted.

[0019] 1. First Embodiment 1.1. Configuration of Indoor Structure FIG. 1 is a diagram for explaining a first form and schematically shows the appearance of an indoor structure 10, and FIG. 2 is a front view of one wall portion 11 provided in the indoor structure 10 illustrated in FIG. 1. FIG. 3 is a diagram schematically showing the configuration of an acoustic system 15 included in the indoor structure 10.

[0020] As can be seen from FIGS. 1 and 2, the indoor structure 10 of this form has a wall portion 11 that constitutes a side surface, a ceiling portion 12 that constitutes an upper portion, and a floor portion 13 that constitutes a lower portion so as to partition the indoor space 1, and the indoor space 1 is partitioned by the inside surrounded by these. In FIG. 1, for simplicity of illustration and description, the wall portions existing on the front side (the front side of the paper surface) of the figure, and openings such as windows and doors that are usually provided at one or more locations in the indoor structure 10, furniture, lighting fixtures, miscellaneous goods, etc. are not shown. And in this form, the acoustic system 15 is applied to the wall portion 11 among them. Therefore, although the explanation here is based on the acoustic system 15 applied to the wall portion 11, it is not limited to this, and instead, or in addition to this, the acoustic system may be applied to the ceiling portion and / or the floor portion.

[0021] [Acoustic System] In this form, the acoustic system 15 has at least a first speaker 20 and a second speaker 30, and further, the first speaker 20 and the second speaker 30 are configured to drive the first speaker 20 and the second speaker 30 so that the first speaker 20 and the second speaker 30 generate sound waves. In this form, as shown in FIG. 3, in addition to the first speaker 20 and the second speaker 30, a sensor 40, an input device 41, a sound source device 42, an arithmetic device 45, and an amplification device 50 are provided. Each configuration will be described below.

[0022] <First Speaker> The first speaker 20 is a device that outputs sound toward the indoor space 1, and in this form, it is a planar speaker. The planar speaker includes a surface material and a vibrator (means for generating vibration), and the vibrator vibrates the surface material to output sound.

[0023] <Second Speaker> The second speaker 30 is also a device that outputs sound toward the indoor space 1, and in this embodiment, it is a planar speaker.

[0024] <Relationship between the First Speaker and the Second Speaker> The first speaker 20 and the second speaker 30 are supposed to have different sound ranges (suitable sound ranges) with high reproducibility. For example, typically, the sound range is divided into a bass range, a midrange, and a treble range, and the first speaker 20 and the second speaker 30 are speakers with different suitable sound ranges. Here, the bass range is sometimes called a woofer and outputs at a frequency in the range of about 50 Hz to 500 Hz, the midrange is sometimes called a squawker and outputs at a frequency in the range of about 100 Hz to 5000 Hz, and the treble range is sometimes called a tweeter and outputs at a frequency in the range of about 2000 Hz to 15000 Hz.

[0025] In this way, the specific forms of the first speaker 20 and the second speaker 30 for distinguishing the differences in the bass range, midrange, and treble range are not particularly limited, but for example, the following can be mentioned.

[0026] {Example of a Midrange Speaker} Fig. 4 shows Speaker A, which is an example of a planar speaker suitable for midrange reproduction. In Fig. 4, it is a perspective view for explaining Speaker A, and a part of the backside surface material A 1b is broken to show the core material A 1a in the figure. Speaker A includes a face material A 1 and a vibrator A 2 . Here, the face material A 1 has a core material A 1a , and on one side of this core material A 1a is the backside surface material A 1b , and on the other side of the core material A 1a is the frontside surface material A 1c is arranged.

[0027] The core material A 1aA plate material having a structure called a so-called honeycomb core can be used. In a typical configuration, cells, which are a plurality of hexagonal cylinders, are arranged in a planar shape in a direction orthogonal to the side surfaces of the hexagonal cylinders with the side surfaces adjacent to each other to form a plate-like member. Although materials for such a honeycomb core are well-known, aluminum alloys such as aluminum or duralumin, epoxy resin, phenolic resin, melamine resin, phenol epoxy resin, thermosetting resins such as urethane resin, olefin resins such as polyethylene, polypropylene, ethylene-propylene copolymer, various nylons, polyamide resins such as aramid resin (aromatic polyamide), polystyrene, polyvinyl chloride, acrylic resin, polycarbonate resin, thermoplastic resins such as thermoplastic polyester resin, high-quality paper, Japanese paper, paper such as paper mixed with aluminum hydroxide, woven or non-woven fabrics made of glass fiber, carbon fiber, polyester resin fiber, polyamide resin fiber, etc., materials obtained by impregnating and curing the above-mentioned paper, woven fabric, or non-woven fabric with a thermosetting resin, etc. can be mentioned. In addition, as materials other than the honeycomb core, porous materials such as single boards, plywood, fiberboards, particle boards, laminated woods, etc. made of various trees such as cedar, cypress, pine, oak, zelkova, chestnut, lauan, teak, etc. can also be used.

[0028] Here, the adjustment of the sound range of the speaker suitable for the reproduction of the midrange can be performed by the opening density (the number of cells included per unit area in a plan view) of the plurality of cells arranged in the honeycomb core of the core material A 1a the material of the core material A 1a the shape of the core material A 1a and the like.

[0029] The backside surface material A 1b is a plate-like surface material arranged on the surface side opposite to the indoor space 1 when the speaker A is arranged on the wall portion 11. And the backside surface material A 1b has a vibrator A 2 arranged thereon. From such a viewpoint, it is preferable that the backside surface material A 1b has relatively high strength and high flexural rigidity. Therefore, the backside surface material A 1bThe material constituting it is not particularly limited, but it can be considered in the same way as the core material. However, it does not necessarily have to be the same as the core material and may be a different material.

[0030] Surface side finishing material A 1c is a plate-shaped finishing material arranged so as to face the indoor space 1 when the speaker A is arranged on the wall portion 11. Therefore, the surface of the surface side finishing material A 1c is regarded as the design surface. Surface side finishing material A 1c is, for example, a form composed of a plate material made of the same material as the above-described back side finishing material A 1b and wallpaper constituting the design surface attached to its surface.

[0031] Vibrator A 2 is attached to the back side finishing material A 1 of the facing material A 1b , vibrates based on the received signal, and transmits this to the facing material A 1 to output it as sound. Such a vibrator is sometimes called an exciter, and a known one can be applied. Vibrator A 2 The position where it is arranged on the back side finishing material A 1b is not particularly limited and can be set as appropriate. A plurality of vibrators A 1 may be arranged on one facing material A 2 . Also, the vibrator A 2 can, as shown in FIG. 4, be installed not only on the back side finishing material A 1 of the facing material A 1b , but also installed in a state where a part or all of it is embedded in the facing material A 1 .

[0032] {Example of a high-frequency speaker} FIG. 5 shows a speaker B which is an example of a planar speaker suitable for reproducing high frequencies. In FIG. 5, it is a perspective view for explaining the speaker B, and a part of the back side finishing material B 1b is broken to show the core material B 1a . Speaker B includes a face material B 1 and a vibrator B 2 Here, the face material B 1 has a core material B 1a On one side of this core material B 1a is a backside facing material B 1b On the other side of the core material B 1a is a front side facing material B 1c Here, the backside facing material B 1b can be considered in the same way as the backside facing material A 1b and the front side facing material B 1c can be considered in the same way as the front side facing material A 1c However, the backside facing material B 1b is not necessarily required, and the vibrator B 2 may be directly attached to the core material B 1a .

[0033] The core material B 1a can use a metal plate. Examples of metal materials include aluminum, stainless steel, duralumin, copper, brass, phosphor bronze, etc.

[0034] Here, the adjustment of the sound range of the speaker suitable for the reproduction of the high frequency range can be performed by adjusting the specific acoustic resistance value of the core material B 1a The specific acoustic resistance value is also called acoustic impedance and indicates the pressure required to vibrate air at a unit speed. Specifically, the specific acoustic resistance value can be expressed as follows using the density and elastic modulus of the material of the core material B 1a . Specific acoustic resistance value ≒ speed of sound (m / sec) × density (kg / m 3 ) =(elastic modulus (Pa) / density (kg / m 3 )) 0.5 × density (kg / m 3 ) As can be seen from this formula, the larger the specific acoustic resistance value, the more high - pitched sounds can be output.

[0035] The vibrator B 2 is attached to the face material B1 Among them, the backside decorative material B 1b is attached to it, vibrates based on the received signal, and transmits this to the facing material B 1 to output it as sound. In order to enhance the reproduction of high-frequency sounds and output them, in this embodiment, the vibrator B 2 can use a metal hammer type vibrator. Examples of the metal hammer type vibrator include magnetostrictive elements. The vibrator B 2 The position where it is arranged on the backside decorative material B 1b is not particularly limited and can be set as appropriate. A plurality of vibrators B 1 can be arranged on one facing material B 2 if necessary. Also, as shown in FIG. 5, the vibrator B 2 can be installed not only on the backside decorative material B 1 of the facing material B 1b but also installed in a state where part or all of it is embedded inside the facing material B 1 if necessary.

[0036] Here, an example of using a metal plate for the core material as a speaker suitable for high-frequency reproduction has been described, but it is not limited to this. Instead, the honeycomb core used in the core material of a speaker suitable for mid-frequency reproduction can be applied, and the aperture density of the cells arranged in multiple arrays, the material of the core material, the shape of the core material, etc. can be changed so that an output suitable for high-frequency reproduction is possible. When selecting the material of the core material, the specific acoustic resistance value may be considered as described above.

[0037] {Example of a low-frequency speaker} FIG. 6 shows a speaker C which is an example of a planar speaker suitable for low-frequency reproduction. FIG. 6 is a cross-sectional view for explaining the speaker C. The speaker C includes a facing material C 1 and a speaker element C 2 is provided. The facing material C 1 is formed to constitute a bassless enclosure structure. That is, the backside decorative material C 1b and the front side decorative material C 1cA gap I is provided between them. At this time, the outer peripheral end of the gap I is open at a part II, and the other parts are blocked by the member C 1a . Also, an opening III is provided in the part of the backside facing material C 1b where the speaker element C 2 is arranged. Further, a wall portion C 1b is erected from the surface of the backside facing material C 2 so as to surround the speaker element C 2 in the part where the speaker element C 1d is arranged. Therefore, an opening III is provided on the side of the backside facing material C 1b in the part surrounded by the wall portion C 1d and communicates with the gap I, and an opening IV is formed on the side opposite to the backside facing material C 1b . 1b Here, except for the above opening III, the backside facing material C 1b can be considered in the same way as the backside facing material A 1b , and the front side facing material C 1c can be considered in the same way as the front side facing material A 1c .

[0038] The speaker element C 2 is an element that outputs sound (generates vibration), and is attached to the backside facing material C 1 of the facing material C 1b . More specifically, the speaker element C 2 is arranged inside the area surrounded by the wall portion C 1d , and the direction in which sound comes out is the opening III side, and the opening IV is on the opposite side.

[0039] Note that here, a bassless type enclosure structure is applied as a speaker suitable for the reproduction of the bass range. However, the present invention is not limited to this, and a honeycomb core used as a core material of a speaker suitable for the reproduction of the midrange is applied to fill the gap I, and the opening density of a plurality of cells arranged so as to enable output suitable for the reproduction of the bass range, the material of the core material, the shape of the core material, etc. can be changed and used. In selecting the material of the core material, the specific acoustic resistance value may be considered as described above. ​

[0040] <Sensor> Sensor 40 is a device that detects a desired state. The type of the sensor may be any type of sensor according to the need and is not particularly limited. For example, a human presence sensor that detects the presence or absence of a person, a light sensor, a sensor that detects a person's facial expression by analysis based on a predetermined algorithm using image information, an acoustic sensor that detects sounds of various frequencies such as ultra-low frequency sound, audible frequency band sound, ultrasonic waves, etc., a sensor that detects a person's voice by analysis based on a predetermined algorithm using the sound information detected by the acoustic sensor, a temperature sensor, a humidity sensor, a body motion sensor such as a gyro sensor that detects the motion state of an object such as a person, an animal, or an inanimate object, such as position, speed, angular velocity, acceleration, or angular acceleration, a vital sensing sensor that detects various predetermined physical quantities such as body temperature, blood pressure, respiratory rate, electrocardiogram, electroencephalogram, etc. and measures or visualizes a person's physical or mental state or sleep state by analyzing with a predetermined algorithm as necessary, a magnetic sensor, an infrared sensor, and various other sensors can be mentioned.

[0041] <Input device> Input device 41 is a device that inputs commands to arithmetic unit 45. It is not particularly limited as long as it can input commands to arithmetic unit 45, and examples include a keyboard, a mouse, etc.

[0042] <Sound source device> Sound source device 42 is a device that inputs a signal corresponding to sound to arithmetic unit 45. It is not particularly limited, but for example, in addition to a device that directly converts sound into an audio signal such as a microphone in real time, various forms of audio recording and playback devices that convert sound into various physical quantities such as groove shape, magnetism, electricity, optical reflectivity, etc. and record it and reproduce it as an audio signal as appropriate can be mentioned. In FIG. 3, only one sound source device 42 is shown, but a plurality of sound source devices 42 may be prepared and individual sound source devices 42 may record and reproduce different audio signals respectively.

[0043] <Arithmetic unit> The arithmetic unit 45 calculates and determines the sounds to be output from the first speaker 20 and the second speaker 30 based on a program, and transmits an audio signal to the amplifier 50 based on the resulting control signal (instruction). Specific aspects such as the content of this calculation will be described later. Such an arithmetic unit 45 can be constituted by a computer such as a personal computer. That is, in a computer including a CPU as a central processing unit, a RAM, a ROM, an HDD, etc. as storage devices, the CPU can be configured to execute a computer program stored in the ROM or HDD using the RAM. In addition, the calculation by this arithmetic unit 45 is performed individually for the first speaker 20 and the second speaker 30, or for each group of a plurality of first speakers 20 and each group of a plurality of second speakers 30. Thereby, it is possible to more appropriately and flexibly realize the output of sounds as required.

[0044] <Amplifier> The amplifier 50 is a device that receives a control signal from the arithmetic unit 45, amplifies an audio signal from a predetermined sound source device 42 based on this, and transmits it to the first speaker 20 and the second speaker 30, and is a device called a so-called amplifier. Such an amplifier 50 is not particularly limited and a known one can be used.

[0045] [Arrangement of each member] With the above-described configurations combined as follows, for example, an indoor structure 10 is formed. Since the indoor structure 10 constitutes the indoor space 1, in this embodiment, a known ceiling material is arranged on the ceiling portion 12, and a known floor material 13 is arranged on the floor portion 13. And at least one, preferably a plurality of first speakers 20 and second speakers 30 are arranged on the wall portion 11. At this time, the surface-side finishing material of the first speaker 20 and the surface-side finishing material of the second speaker 30 are arranged so as to face the indoor space 1. The arrangement of the first speaker 20 and the second speaker 30 on the wall portion 11 is appropriately determined according to the purpose. Specific examples thereof will be described later. Note that a normal (non-speaker) wall material 11a may be arranged on the wall portion 11 where the first speaker 20 and the second speaker 30 are not arranged.

[0046] At this time, if the design surfaces of the surface-side decorative materials of the first speaker 20, the second speaker 30, and the normal wall material 11a are the same, the speaker and the normal wall material cannot be distinguished in appearance, so a space where the speaker is not recognized can be created. However, it is not limited to this, and they may be different from the design surfaces of the first speaker 20, the second speaker 30, and the wall material 11a. Alternatively, each design surface may be used as an accent for interior items such as paintings and photographs.

[0047] The sensor 40 is arranged at a position where it is easy to detect the object to be detected. Since the input device 41 is a means for directly inputting information to the arithmetic unit 45, it may be arranged at any position as long as input is possible. Similarly, the sound source device 42 may be installed at a necessary position. Note that the sensor 40, the input device 41, the arithmetic unit 45, and the amplification device 50 do not necessarily have to be provided, or one or two or more of them may be arranged.

[0048] As shown in FIG. 3, when the arithmetic unit 45 includes either the sensor 40 or the input device 41, it is configured to receive and capture a signal therefrom, and is configured to transmit an audio signal generated from the selected sound source device 42 to the amplification device 50 based on the control signal output as a result of the arithmetic operation. These capture and transmission may be either wired or wireless. Therefore, the position where the arithmetic unit 45 is arranged is not particularly limited, and it may be inside or outside the indoor space 1, in a separate room, in another building, or the like.

[0049] As can be seen from FIG. 3, the amplification device 50 is connected to the arithmetic unit 45 to receive the signal from the arithmetic unit 45 as described above, and transmits the amplified signal to the first speaker 20 and the second speaker 30 in order to transmit the amplified signal to the oscillator or the like (A 2 , B 2 , C 2 etc.). As shown in FIG. 4, when individually controlling the outputs of the plurality of first speakers 20 and the plurality of second speakers 30, an amplification device 50 is arranged for each of the plurality of first speakers 20 and the second speakers 30. On the other hand, when a group including the plurality of first speakers 20 is regarded as one group and a group including the plurality of second speakers 30 is regarded as one group, and controlling the sound output for each group, one amplification device 50 may be installed for each group.

[0050] 1.2. Operation of the indoor structure With the indoor structure 10 as described above, it can be operated as follows, for example. The flow is shown in FIG. 7. When at least one of the sensor 40 and the input device 41 is provided, the arithmetic unit 45 receives the voice signals from these (S11). The signal from the sensor 40 is a signal of the information detected by the sensor 40. The signal from the input device 41 is, for example, a signal for selecting a desired sound for the arithmetic unit 45, and it is assumed that the desired sound is directly selected from the keyboard. The signals from the sound source device 42 can include signals from sound regenerators such as microphones, voice signal recording and playback devices such as CDs, voice signals transmitted via a communication line, and voice signals generated from the arithmetic unit and storage device of a computer. Next, based on the received signals, the arithmetic unit 45 calculates and determines the sound to be output for each speaker or each group according to the program (S12). Here, in the case of an audio system not provided with the sensor 40, the input device 41, and the sound source device 42, a signal for the sound to be output is calculated and determined based on a predetermined program. The arithmetic unit 45 outputs the determined signal to the amplification device 50 (S13), and the received amplification device 50 amplifies the signal and outputs it to the first speaker 20 and the second speaker 30 (S14). As a result, the first speaker 20 and the second speaker 30 output sound (S15). The above S11 to S15 are repeated, and a desired sound is provided as appropriate.

[0051] According to the indoor structure 10 as described above, it is possible to achieve both a spatial design and a sound environment. That is, visually, the wall material and the speaker that make up the space are integrated to realize a clean and beautiful spatial design, and aurally, different sounds can be output depending on the part of the space, ensuring the diversity of the sound environment production. In addition, in this embodiment, since a plurality of speakers with different suitable sound ranges are arranged, high-quality sound can be output for each sound range, and the indoor structure can enhance the function of sound in the indoor space.

[0052] 1.3. Specific examples of sound environment Specific examples of the sound environment realized by the indoor structure of the present disclosure will be described below. Since the sound environment that can be realized by the indoor structure of the present disclosure is diverse, the following specific examples are illustrative and are not limited thereto.

[0053] [Improvement of acoustic equipment] In a space with acoustic equipment such as a movie theater, the second speaker is a speaker suitable for the low sound range (for example, speaker C) and is arranged at a low position, and the first speaker is a speaker suitable for the high sound range (for example, speaker B) or a speaker suitable for the middle sound range (for example, speaker B). At this time, the number of the second speakers is made larger than the number of the first speakers. Thereby, the sense of depth and the compelling force can be improved.

[0054] [Reproduction of natural environment] When reproducing a natural environment, a third speaker is further provided. The third speaker can be considered in the same way as the first speaker and the second speaker. Then, a third speaker is arranged downward as a speaker suitable for the low frequency range (e.g., speaker C) to reproduce the sound of a river stream or waves, a second speaker is arranged at a central position in the height direction as a speaker suitable for the middle frequency range (e.g., speaker A) to reproduce the sound of wind, and a first speaker is arranged upward as a speaker suitable for the high frequency range (e.g., speaker B) to reproduce the chirping of birds. This can provide high-quality sounds suitable for each frequency range.

[0055] [Reproduction of scenes with sound movement] For example, in a space that reproduces a scene having a feature such that sounds move horizontally, like an auto racecourse, the second speaker is used as a speaker suitable for the low frequency range (e.g., speaker C) and is arranged at a low position, and the first speaker is used as a speaker suitable for the middle frequency range (e.g., speaker B) and is arranged more in the horizontal direction than in the vertical direction. Further, the number of the first speakers is made larger than the number of the second speakers. This expresses a sense of presence in the movement of sound.

[0056] 1.4. Others In the above, it is classified into three frequency ranges: low frequency range, middle frequency range, and high frequency range. However, it is not limited to this, and it may be classified into two frequency ranges or four or more frequency ranges, and speakers suitable for different multiple applicable frequency ranges may be arranged.

[0057] Also, in the above, examples of arranging two or three types of speakers with different highly reproducible frequency ranges are shown. However, it is not limited to this, and four or more types of speakers with different highly reproducible frequency ranges, that is, a plurality of types of speakers with different applicable frequency ranges, may be arranged.

[0058] Also, although specific examples of the acoustic environment are shown, a plurality of types of speakers with different applicable frequency ranges are not necessarily arranged in the same number, and the number of some types of speakers may be made larger than others as needed.

[0059] 2. Second form In the first form, it was explained that a plurality of types of speakers with different highly reproducible sound ranges are arranged. In contrast, in the second form, a speaker having a plurality of regions with different suitable sound ranges is arranged within one speaker. Regarding the configuration other than the speaker, it can be considered in the same manner as the above-described first form, so the description is omitted here.

[0060] [Speaker] The speaker is a device that outputs sound toward the indoor space 1, and in this form, it is a planar speaker. The planar speaker includes a surface material and a vibrator, and the vibrator vibrates the surface material to output sound.

[0061] The speaker of this form has a plurality of regions with different highly reproducible sound ranges in one speaker. For example, typically, the sound range is divided into a bass range, a midrange, and a treble range, and it is a speaker that outputs different sound ranges with high reproducibility within one speaker. Here, the bass range may be called a woofer and outputs at a frequency in the range of about 50 Hz to 500 Hz, the midrange may be called a squawker and outputs at a frequency in the range of about 100 Hz to 5000 Hz, and the treble range may be called a tweeter and outputs at a frequency in the range of about 2000 Hz to 15000 Hz.

[0062] Thus, the specific form of the region for distinguishing the bass range, the midrange, and the treble range is not particularly limited, but for example, the following can be mentioned.

[0063] <Example 1> FIG. 8 shows a speaker 60 according to Example 1 which is one example. FIG. 8 is a perspective view for explaining the speaker 60 and is a view showing the core material 62 visible by breaking a part of the back surface side decorative material 63. The speaker 60 includes a surface material 61 and a vibrator 65. Here, the surface material 61 has a core material 62, and a back surface side decorative material 63 is arranged on one surface side of the core material 62, and a front surface side decorative material 64 is arranged on the other surface side of the core material 62. Note that the vibrator 65 is the vibrator A of the above-described speaker A 2 , or the vibrator B of the speaker B2 It can be considered in the same way. The core material 62 includes a first region 62a and a second region 62b having different suitable sound ranges.

[0064] In this embodiment, the first region 62a has a midrange as the suitable sound range and is formed in the lower half of FIG. 8 of the core material 62. In this embodiment, the second region 62b is a region composed of a honeycomb core in the same manner as the speaker A described above. The description of the honeycomb core is the same as that of the speaker A. In this embodiment, the second region 62b is at a high temperature and is formed in the upper half of FIG. 8 of the core material 62. In this embodiment, the second region 62b is a region composed of a metal plate in the same manner as the speaker B described above. The description of the metal plate is the same as that of the speaker B.

[0065] <Example 2> In Example 2, instead of the metal plate of the second region 62b of the core material 62 shown in Example 1 above, a honeycomb core is also applied to the second region. However, the opening density of a plurality of arranged cells, the material of the core material, the shape of the core material, etc. are changed so that the second region has a different suitable sound range from the honeycomb core of the first region 62a.

[0066] <Effects, etc.> By arranging a plurality of such speakers on the wall portion 11, the same effect as that of arranging a plurality of speakers having different suitable sound ranges (the above first form) is achieved, high-quality sound can be output in each sound range, and the indoor structure can enhance the sound function in the indoor space. According to the inventor's tests, by arranging a large number of the speakers of this embodiment in the horizontal direction, the finding that it is particularly excellent in reproducing "scenes with sound movement" as described above was obtained. In this way, it can be selectively used according to the image of what is to be reproduced.

[0067] <Others> In the above example, two regions, a first region and a second region, are used. However, if there are a plurality of regions having different suitable sound ranges, three or more regions having different suitable sound ranges may be arranged. Also, the shape of each region is not particularly limited, and a necessary shape can be adopted. From this perspective, regions with different suitable sound ranges may be arranged in a subdivided and mixed manner. The pattern of such mixing is not particularly limited. For example, honeycomb cells may be mixed in a Voronoi pattern.

[0068] 3. Third form 3.1. Configuration of the indoor structure In the third form, the first and second forms described how to enhance the function of sound in the indoor space according to the sound range. The third form is a form that enhances the function of sound in the indoor space according to the direction of sound propagation. Therefore, the configuration of the indoor structure in this form, unlike the first form in terms of the speaker, can be considered in the same way as the first form for other configurations. So, the speaker will be described here.

[0069] In this form, the audio system has at least a first speaker 120 and a second speaker 130, and further, the first speaker 120 and the second speaker 130 are configured to drive the first speaker 120 and the second speaker 130 so that the first speaker 120 and the second speaker 130 generate sound waves. The first speaker 120 and the second speaker 130 are such that the directions of sound propagation of the output sound are different. Here, the "direction of sound propagation" means the direction in which the sound intensity is the strongest, and "the directions of sound propagation are different" means that the directions are different.

[0070] [First speaker] The first speaker 120 is a device that outputs sound toward the indoor space 1 and is a planar speaker in this form. The planar speaker includes a face material and a vibrator, and the vibrator vibrates the face material to output sound. The first speaker 120 is shown in FIG. 9. FIG. 9 is a cross-sectional view for explaining the first speaker 120. The first speaker 120 includes a face material 121 and a vibrator 122. Here, the face material 121 has a core material 121a, and a back surface side facing material 121b is disposed on one surface side of the core material 121a, and a front surface side facing material 121c is disposed on the other surface side of the core material 121a. Here, the back surface side facing material 121b is the back surface side facing material A of the speaker A described above 1b , and the front surface side facing material 121c can be considered in the same way as the back surface side facing material A of the speaker A 1c . Also, the vibrator 122 can be considered in the same way as the vibrator A of the speaker A 2 .

[0071] As the core material 121a, a plate material having a structure called a so-called honeycomb core can be used. Regarding the configuration of the honeycomb core, it can be considered in the same way as the core material A of the speaker A 1a . However, in the honeycomb core of the core material 121a, the direction of the axis of the space where each cell is hexagonal columnar is the normal direction of the face material 121, and the sound propagation direction of the first speaker 120 is also the normal direction as indicated by the straight arrow IX in FIG. 9. That is, the honeycomb structure is so to speak an aggregate of cylinders, and when the cylinders are vibrated, vibration is transmitted in the cylinder direction. Therefore, it is considered that the sound direction also goes in the cylinder direction (cylinder axis direction), and this can be set as the sound propagation direction. The same applies hereinafter.

[0072] [Second Speaker] The second speaker 130 is also a device that outputs sound toward the indoor space 1, similar to the first speaker, and is a planar speaker in this embodiment. The planar speaker includes a face material and a vibrator, and outputs sound by the vibrator vibrating the face material. The second speaker 130 is shown in FIG. 10. FIG. 10 is a cross-sectional view for explaining the second speaker 130. The second speaker 130 includes a face material 131 and a vibrator 132. Here, the face material 131 has a core material 131a, and a back surface side facing material 131b is disposed on one surface side of the core material 131a, and a front surface side facing material 131c is disposed on the other surface side of the core material 131a. Here, the back surface side facing material 131b is the back surface side facing material A of the speaker A described above1b The surface-side mounting material 131c can be considered in the same way as the back-side mounting material A of the speaker A. 1c Similarly, the vibrator 132 can be considered in the same way as the vibrator A of the speaker A. 2 Similarly, it can be considered in the same way.

[0073] As the core material 131a, a plate material having a structure called a so-called honeycomb core can be used. Regarding the configuration of the honeycomb core, it can be considered in the same way as the core material A of the speaker A. 1a Similarly, it can be considered in the same way. However, the honeycomb core of the core material 131a is inclined at an angle θ (θ is not 0°) with respect to the normal direction of the facing material 161 in the axial direction of the hexagonal columnar space of each cell as shown in FIG. 10, and the sound propagation direction of the second speaker 130 also becomes the inclined direction as indicated by the straight arrow X in FIG. 10.

[0074] [Arrangement of each member] By replacing the first speaker 120 with the first speaker 20 of the first form and replacing the second speaker 130 with the second speaker 30 of the first form and arranging them, an indoor structure can be formed.

[0075] 3.2. Operation of the indoor structure The indoor structure of this form can be operated in the same way as described with reference to FIG. 7. When at least one of the sensor 40 and the input device 41 is provided, the arithmetic unit 45 receives the audio signal from these (S11). The signal from the sensor 40 is a signal of the information detected by the sensor 40. The signal from the input device 41 is, for example, a signal for selecting a desired sound with respect to the arithmetic unit 45, and it is assumed that a desired sound is directly selected from the keyboard. Examples of the signal from the sound source device 42 include signals from sound regenerators such as microphones, CD players, audio signals transmitted via a communication line, and audio signals generated from the arithmetic unit and storage device of a computer. Next, based on the received signal, the arithmetic unit 45 calculates and determines the sound to be output for each speaker or each group by a program (S12). Here, in the case of an audio system that does not include the sensor 40, the input device 41, and the sound source device 42, a signal for the sound to be output is calculated and determined based on a predetermined program. The arithmetic unit 45 outputs the determined signal to the amplifier 50 (S13), and the received amplifier 50 amplifies the signal and outputs it to the first speaker 120 and the second speaker 130 (S14). As a result, the first speaker 120 and the second speaker 130 output sound (S15). The above S11 to S15 are repeated, and a desired sound is provided as appropriate.

[0076] According to the indoor structure as described above, it is possible to achieve both a space design and a sound environment. That is, visually, the wall material and the speaker that make up the space are integrated to realize a clean and beautiful space design, and aurally, different sounds can be output depending on the part of the space, ensuring the diversity of the sound environment production. In addition, in this embodiment, since a plurality of speakers with different sound propagation directions are arranged, sound can be output in each direction, and it becomes an indoor structure that can enhance the sound function by three-dimensionally outputting sound in the indoor space.

[0077] 3.3. Others In the above, an example of arranging two types of speakers with different sound propagation directions has been shown, but it is not limited to this, and three or more types with different suitable sound ranges, that is, a plurality of types of speakers with different sound propagation directions may be arranged.

[0078] Also, a plurality of types of speakers with different sound propagation directions do not necessarily have to be arranged in the same number, and the number of some types of speakers may be made larger than others as necessary.

[0079] 4. The Fourth Embodiment In the third embodiment, it was explained that a plurality of types of speakers with different sound propagation directions are arranged. In contrast, in the fourth embodiment, a speaker having a plurality of regions with different sound propagation directions is arranged within one speaker. Regarding the configurations other than the speaker, they can be considered in the same manner as in the above-described third embodiment, and thus the description thereof will be omitted here.

[0080] [Speaker] The speaker is a device that outputs sound toward the indoor space 1, and in this embodiment, it is a planar speaker. The planar speaker includes a face material and a vibrator, and the vibrator vibrates the face material to output sound.

[0081] The speaker of this embodiment has a plurality of regions with different sound propagation directions provided in one speaker. Specifically, it is as follows. FIG. 11 shows a speaker 140 as an example. FIG. 11 is a cross-sectional view of the speaker 140. The speaker 140 includes a face material 141 and a vibrator 145. Here, the face material 141 has a core material 142, and a backside surface material 143 is disposed on one surface side of the core material 142, and a frontside surface material 144 is disposed on the other surface side of the core material 142. Note that the vibrator 145 can be considered in the same manner as the vibrator A of the above-described speaker A 2 and can be considered in the same manner. And the core material 142 has a first region 142a, a second region 142b, and a third region 142c with different sound propagation directions.

[0082] In this embodiment, the honeycomb core of the first region 142a has a hexagonal column shape for each cell, and the axial direction of the space is the normal direction of the face material 141. As shown by the straight arrow XIa in FIG. 11, the sound propagation direction in the corresponding region of the speaker 140 is also the normal direction. In this embodiment, the honeycomb core of the second region 142b has a hexagonal column shape for each cell, and the axial direction of the space is α (α≠0°) with respect to the normal direction of the face material 141. As shown by the straight arrow XIb in FIG. 11, the sound propagation direction in the corresponding region of the speaker 140 is also the same direction as α. In this form, the honeycomb core of the third region 142c has a hexagonal columnar shape for each cell, and the axial direction of the space is β (β≠0°, β≠α) with respect to the normal direction of the face material 141. As shown by the straight arrow XIc in FIG. 11, the sound propagation direction in this region of the speaker 140 is also in the same direction as the β.

[0083] [Effects, etc.] By arranging a plurality of such speakers 140 on the wall portion 11, the same effect as that of arranging a plurality of speakers with different sound propagation directions is achieved, and sound can be output in each direction, resulting in an indoor structure that can output sound three-dimensionally in the indoor space and enhance the sound function.

[0084] [Others] In the above example, three regions, i.e., the first region, the second region, and the third region, are provided. However, if there are a plurality of regions with different sound propagation directions, two regions may be sufficient, or four or more regions may be arranged. Also, the shape of each region is not particularly limited, and a necessary shape can be adopted.

Explanation of symbols

[0085] 1 Indoor space 10 Indoor structure having an acoustic system 11 Wall portion 12 Ceiling portion 13 Floor portion 15 Acoustic system 20 First speaker 30 Second speaker 60 Speaker 120 First speaker 130 Second speaker 140 Speaker

Claims

1. An indoor structure that constitutes an indoor space surrounded by a wall portion, a floor portion, and a ceiling portion, wherein an acoustic system is arranged in the indoor structure, and the acoustic system has a plurality of speakers each composed of a facing material and a vibrator arranged on one surface of the facing material, provided on at least one of the wall portion, the floor portion, and the ceiling portion, wherein the plurality of speakers include a plurality of types having different applicable sound ranges, wherein one type of the plurality of types of speakers includes a honeycomb core in the core material of the facing material, wherein another type of the plurality of types of speakers includes a metal plate in the core material of the facing material, wherein another type of the plurality of types of speakers has a core material of the facing material in a bassless enclosure structure, Indoor structure.

2. An indoor structure that constitutes an indoor space surrounded by a wall portion, a floor portion, and a ceiling portion, wherein an acoustic system is arranged in the indoor structure, and the acoustic system has speakers each composed of a facing material and a vibrator arranged on one surface of the facing material, provided on at least one of the wall portion, the floor portion, and the ceiling portion, wherein the speakers include a plurality of regions having different applicable sound ranges, wherein at least two of the regions of the speakers include a honeycomb core in the facing material, and the cell density of the honeycomb core in one region is different from the cell density of the honeycomb core in the other region, Indoor structure.

3. An indoor structure that constitutes an indoor space surrounded by a wall portion, a floor portion, and a ceiling portion, wherein an acoustic system is arranged in the indoor structure, and the acoustic system has a plurality of speakers each composed of a facing material and a vibrator arranged on one surface of the facing material, provided on at least one of the wall portion, the floor portion, and the ceiling portion, wherein the plurality of speakers include a plurality of types having different sound propagation directions for each of the wall portion, the floor portion, and the ceiling portion where the plurality of speakers are arranged, Indoor structure.

4. The indoor structure according to claim 3, wherein the plurality of speakers include a honeycomb core in the facing material, and the sound propagation directions are different due to different axial directions of the cells of the honeycomb core.

5. An indoor structure that constitutes an indoor space surrounded by a wall portion, a floor portion, and a ceiling portion, wherein an acoustic system is arranged in the indoor structure, and the acoustic system At least one of the wall portion, the floor portion, and the ceiling portion has a speaker composed of a facing material and a vibrator disposed on one surface of the facing material. The speaker includes a plurality of regions in which the traveling directions of sound are different. Indoor structure. **Claim 6** The indoor structure according to claim 5, wherein the speaker includes a honeycomb core in the facing material, and the axial directions of the cells of the honeycomb core are different in the plurality of regions, so that the traveling directions of sound are different.

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