JP2019068368A - Glass diaphragm structure and opening member - Google Patents

Abstract

To provide a glass diaphragm structure capable of emitting nondirectional sound and directional sound from the same diaphragm.SOLUTION: A glass diaphragm structure includes a glass plate structure having a loss coefficient of 1×10or more at 25°C and a longitudinal sound velocity value of 4.0×10m/s or more in the thickness direction, at least one oscillator provided in contact with the surface of the glass plate structure, and at least one parametric speaker provided so as to be spaced from the surface of the glass plate structure, and the sound emitting surface of the parametric speaker is provided so as to be oriented towards the surface of the glass plate structure.SELECTED DRAWING: Figure 10

Description

  The present invention relates to a glass diaphragm construction with good acoustic performance, and also to an aperture member using a glass diaphragm construction.

In general, cone paper or resin is used as a diaphragm for a speaker or a microphone. These materials have a large loss coefficient and are less susceptible to vibration due to resonance, so it is said that sound reproduction performance in the audible range is good.
However, in any of these, since the sound velocity value in the material is low, the vibration of the material does not easily follow the sound wave frequency when excited at high frequency, and divided vibration is likely to occur. Therefore, it is difficult to produce a desired sound pressure particularly in the high frequency range.

  In recent years, the band that is required to be reproduced especially by high resolution sound source etc. is a high frequency area of 20 kHz or more, and it is considered as a band that is hard to hear by human ear, but there are things closer to emotions such as feeling of realism Therefore, it is desirable to be able to faithfully reproduce the sonic vibration in the band.

  Then, it is possible to replace with corn paper and resin, and to use a material such as metal, ceramic, glass, etc., which has a high sound velocity propagating to the material. However, since these materials generally have a loss coefficient as small as about 1/10 to 1/100 as compared to paper, unintended reverberation is likely to remain. Furthermore, when it excites by the natural frequency of a member, deterioration of the timbre by which a resonance mode generate | occur | produces may generate | occur | produce.

Olivier Mal et. al. , "A Novel Glass Laminated Structure for Flat Panel Loudspeakers" AES Convention 124, 7343.

  A laminated glass having a butyral-based resin layer between two glass plates is known as a diaphragm for a speaker (Non-Patent Document 1). However, the diaphragm is difficult to reproduce in the high frequency region.

  In the present invention, it is an object of the present invention to provide a glass diaphragm structure having good acoustic performance and capable of emitting nondirectional sound and directional sound from the same diaphragm.

  As a result of intensive study, the present inventor has found that the above problems can be solved by realizing a predetermined glass diaphragm structure, and the present invention has been completed.

That is, the present invention is as follows.
A glass plate structure having a loss coefficient of 1 × 10 ⁻² or more at 25 ° C. and a longitudinal sound velocity value of 4.0 × 10 ³ m / s or more in the thickness direction, and the glass plate configuration At least one transducer provided in contact with the surface of the body and at least one parametric speaker provided at a distance from the surface of the glass sheet assembly; The glass diaphragm structure provided with facing toward the surface of the said glass plate structure.
<2> The glass plate structure is preferably a glass diaphragm structure including two or more glass plates and including a liquid layer between at least a pair of glass plates of the glass plates.
<3> When the thickness of the liquid layer is 1 mm or less of the total thickness of the pair of glass plates, it is 1/10 or less of the total thickness of the pair of glass plates, and the total of the pair of glass plates It is preferable that it is a glass diaphragm structure which is 100 micrometers or less which is more than 1 mm in thickness.
<4> the viscosity at 25 ° C. of the liquid layer becomes ^{1 × 10 -4 ~1 × 10 3} Pa · s, and the surface tension at 25 ° C. is 15~80mN / m, a glass diaphragm structure Is preferred.
<5> least one pair of specific modulus of the glass plate of the glass plate together, 2.5 × is 10 7 ^m 2 ^/ s ² or more, preferably a glass diaphragm structure.
<6> Of the two glass plates constituting the pair of glass plates, the resonance frequency of one glass plate A is Qa, the half width of the resonance amplitude is wa, and the resonance frequency of the other glass plate B is Qb, resonance It is preferable that it is a glass diaphragm structure which satisfy | fills the relationship of following [Formula 1] when the half value width of an amplitude is set to wb.
(Wa + wb) / 4 <| Qa-Qb | ... [Expression 1]
<7> It is preferable that it is a glass diaphragm structure body whose mass ratio of the glass plate of 2 sheets which comprises a pair of said glass plate is 0.1-10.0.
<8> It is preferable that it is a glass diaphragm structure which is 0.01-15 mm in thickness of the two glass plates which comprise a pair of said glass plate.
<9> It is preferable that the said liquid layer is a glass diaphragm structure containing at least 1 sort (s) chosen from the group which consists of a propylene glycol, a dimethyl silicone oil, a methylphenyl silicone oil, a methyl hydrogen silicone oil, and a modified silicone oil.
It is preferable that it is a glass diaphragm structure containing the glass plate of <10> 3 sheets or more.
<11> It is preferable that it is a glass diaphragm structure by which at least one of the said glass plates and at least any one of the said liquid layer were colored.
<12> It is preferable that it is a glass diaphragm structure which contains a fluorescent material in the said liquid layer.
<13> It is preferable that the difference of the refractive index of the said liquid layer and the refractive index of a pair of glass plate is a glass diaphragm structure which is 0.2 or less in all.
<14> It is preferable that the said glass plate structure is a glass diaphragm structure containing at least any one glass plate of a physical strengthening glass plate and a chemical strengthening glass plate.
<15> It is preferable that it is a glass diaphragm structure whose visible light transmittance | permeability is 60% or more.
<16> It is preferable that it is a glass diaphragm structure by which coating or the film was formed in the outermost surface of at least one of the said glass plate structure.
<17> It is preferable that it is a glass diaphragm structure whose said glass plate structure is curved-surface shape.
<18> It is preferable that at least a part of the outer peripheral end of the glass plate structure is a glass diaphragm structure sealed with a member that does not prevent the vibration of the glass plate structure.
When the <19> two or more glass plate is included, a liquid layer is included between at least a pair of glass plates among the glass plates, and the thickness of the liquid layer is 1 mm or less of the total thickness of the pair of glass plates A glass diaphragm structure, which is 1/10 or less of the total thickness of the pair of glass plates, and 100 μm or less if the total thickness of the pair of glass plates is more than 1 mm, and the glass plate structure And at least one transducer provided in contact with the surface of the at least one parametric speaker provided at a distance from the surface of the glass sheet assembly, the sound emitting surface of the parametric speaker comprising The glass diaphragm structure provided toward the surface of the said glass plate structure.
<20> 25 loss factor at ℃ is 1 × ^{10 -2} or more, and is longitudinal sound speed value in the thickness direction 4.0 × ¹⁰ 3 m / s or more, and the glass plate structure, the glass plate constituting At least one transducer provided in contact with the surface of the body; and at least one parametric speaker provided at a distance from the surface of the glass sheet assembly, and the sound emitted from the parametric speaker The glass diaphragm structure provided with facing toward the surface of the said glass plate structure.
<21> An opening member using the glass diaphragm structure.

  According to the present invention, in diaphragm applications for use in speakers, televisions, personal computers, AV devices, mobile devices, etc., the reproducibility of sound is excellent over low frequencies to high frequencies, as well as nondirectional sound and directivity. It is possible to make the sound coexist and radiate. In addition, in applications for building / vehicle opening members and the like, it is possible to make it difficult to cause resonance by utilizing high vibration damping ability, and to suppress generation of abnormal noise due to resonance.

FIG. 1 is a cross-sectional view showing an example of the glass plate construction of the present invention. FIG. 2 is a cross-sectional view showing another example of the glass sheet structure of the present invention. FIG. 3: is sectional drawing which shows the other example of the glass plate structure of this invention. FIG. 4 is a perspective view showing still another example of the glass sheet structure of the present invention. Fig.5 (a) is a top view of the glass plate structure shown in FIG. 4, FIG.5 (b) is the A-A 'line sectional view in FIG. 5 (a). FIG. 6 is a cross-sectional view showing another example of the glass sheet structure of the present invention. Fig.7 (a) is a top view which shows the other example of the glass plate structure of this invention, FIG.7 (b) is the A-A 'line sectional view in FIG. 7 (a). Fig.8 (a) is a top view which shows the other example of the glass plate structure of this invention, FIG.8 (b) is the A-A 'line sectional view in FIG. 8 (a). FIG. 9 is a cross-sectional view showing still another example of the glass sheet structure of the present invention. FIG. 10 shows an example of the glass diaphragm structure of the present invention, FIG. 10 (a) is a front view of the glass diaphragm structure, and FIG. 10 (b) is a side view of the glass diaphragm structure. . FIG. 11 shows a conceptual view of the test method of the comparative example, and FIG. 11 (a) is a view from above and FIG. 11 (b) is a view from the side. FIG. 12 shows a conceptual view of the test method of the embodiment, and FIG. 12 (a) is a view from above and FIG. 12 (b) is a view from the side.

  Hereinafter, the details and other features of the present invention will be described based on the modes for carrying out the invention. In the following drawings, the same or corresponding members or parts will be denoted by the same or corresponding reference numerals, and redundant description will be omitted. Also, the drawings are not intended to indicate relative ratios between members or parts, unless otherwise specified. Thus, specific dimensions can be selected as appropriate in light of the following non-limiting embodiments.

  Moreover, "-" which shows a numerical range in this specification is used in the meaning included including the numerical value described before and after that as a lower limit and an upper limit.

<Glass plate composition>
The glass plate structure according to the present invention is characterized in that the loss coefficient at 25 ° C. is 1 × 10 ⁻² or more, and the longitudinal sound velocity value in the plate thickness direction is 4.0 × 10 ³ m / s or more. Do. In addition, that a loss factor is large means that vibration damping capacity is large.

As the loss coefficient, one calculated by the half width method is used. Represented by {W / f}, where W is the resonant frequency f of the material and the frequency width of a point lowered by -3 dB from the peak value that is the amplitude h (that is, the point at the maximum amplitude-3 [dB]) Define the value as a loss factor.
In order to suppress the resonance, it is sufficient to increase the loss coefficient, that is, the frequency width W becomes relatively large with respect to the amplitude h, which means that the peak becomes broad.

  The loss factor is an inherent value of a material or the like, and varies depending on, for example, the composition, relative density, and the like in the case of a single glass plate. The loss factor can be measured by a dynamic elastic modulus test method such as a resonance method.

  The longitudinal sound velocity value refers to the velocity at which the longitudinal wave propagates in the object. The longitudinal sound velocity value and the Young's modulus can be measured by the ultrasonic pulse method described in Japanese Industrial Standard (JIS-R 1602-1995).

  The glass plate structure according to the present invention includes two or more glass plates as a specific configuration for obtaining a high loss coefficient and a high longitudinal sound velocity value, and a predetermined distance between at least a pair of glass plates among the glass plates. It is preferable to include a liquid layer of

(Liquid layer)
The glass plate structure according to the present invention can realize a high loss factor by providing a fluid layer (liquid layer) between at least a pair of glass plates. Above all, the loss coefficient can be further increased by setting the viscosity and surface tension of the liquid layer in a suitable range.
This is considered to be due to the fact that the pair of glass plates does not adhere and continues to have vibration characteristics as each glass plate, unlike the case where the pair of glass plates is provided via the adhesive layer.

The liquid layer preferably has a coefficient of viscosity of 1 × 10 ⁻⁴ to 1 × 10 ³ Pa · s at 25 ° C. and a surface tension of 15 to 80 mN / m at 25 ° C. If the viscosity is too low, it becomes difficult to transmit the vibration, and if it is too high, the pair of glass plates located on both sides of the liquid layer adheres to each other to exhibit the vibration behavior as a single glass plate. Vibration is less likely to be damped. In addition, when the surface tension is too low, the adhesion between the glass plates is reduced and it becomes difficult to transmit the vibration. When the surface tension is too high, the pair of glass plates located on both sides of the liquid layer easily adhere to each other, and the vibration behavior as one glass plate is exhibited, so that the vibration due to resonance is less likely to be attenuated. .

The viscosity coefficient at 25 ° C. of the liquid layer is more preferably 1 × 10 ⁻³ Pa · s or more, further preferably 1 × 10 ⁻² Pa · s or more. Further, 1 × 10 ² Pa · s or less is more preferable, and 1 × 10 5 Pa · s or less is more preferable.
The surface tension at 25 ° C. of the liquid layer is more preferably 20 mN / m or more, still more preferably 30 mN / m or more.

The viscosity coefficient of the liquid layer can be measured by a rotational viscometer or the like.
The surface tension of the liquid layer can be measured by the ring method or the like.

If the liquid layer is too high in vapor pressure, the liquid layer may evaporate and not function as a glass plate structure. Therefore, the liquid layer preferably has a vapor pressure of 1 × 10 ⁴ Pa or less at 25 ° C. and 1 atm, more preferably 5 × 10 ³ Pa or less, and still more preferably 1 × 10 ³ Pa or less. When the vapor pressure is high, sealing or the like may be performed so that the liquid layer does not evaporate, but at this time, it is necessary not to prevent the vibration of the glass plate structure by the sealing material.

The thinner the liquid layer, the better in terms of maintenance of high rigidity and vibration transmission. Specifically, when the total thickness of the pair of glass plates is 1 mm or less, the thickness of the liquid layer is preferably 1/10 or less of the total thickness of the pair of glass plates, and 1/20 or less More preferably, 1/30 or less is further preferable, 1/50 or less is still more preferable, 1/70 or less is even more preferable, and 1/100 or less is particularly preferable.
When the total thickness of the pair of glass plates is more than 1 mm, the thickness of the liquid layer is preferably 100 μm or less, more preferably 50 μm or less, still more preferably 30 μm or less, still more preferably 20 μm or less, 15 μm or less Is more preferable, and 10 μm or less is particularly preferable.
The lower limit of the thickness of the liquid layer is preferably 0.01 μm or more from the viewpoint of productivity and durability.

Preferably, the liquid layer is chemically stable, and the liquid layer does not react with the pair of glass plates located on both sides of the liquid layer.
Chemically stable means, for example, that there is little deterioration (deterioration) due to light irradiation, and solidification, vaporization, decomposition, discoloration, chemical reaction with glass, etc. occur in a temperature range of at least -20 to 70 ° C. It means nothing.

Specific examples of components of the liquid layer include water, oil, organic solvents, liquid polymers, ionic liquids, and mixtures thereof.
More specifically, propylene glycol, dipropylene glycol, tripropylene glycol, straight silicone oil (dimethyl silicone oil, methyl phenyl silicone oil, methyl hydrogen silicone oil), modified silicone oil, acrylic polymer, liquid polybutadiene, glycerin Paste, fluorinated solvent, fluorinated resin, acetone, ethanol, xylene, toluene, water, mineral oil, and mixtures thereof, and the like can be mentioned. Among them, at least one selected from the group consisting of propylene glycol, dimethyl silicone oil, methylphenyl silicone oil, methyl hydrogen silicone oil and modified silicone oil is preferred, and it is preferable to use propylene glycol or silicone oil as the main component. More preferable.

Besides the above, it is also possible to use a slurry in which powder is dispersed as a liquid layer. From the viewpoint of improving the loss factor, the liquid layer is preferably a uniform fluid, but the slurry is effective when the glass sheet structure is to be provided with designability and functionality such as coloring and fluorescence. .
0-10 volume% is preferable, and, as for content of the powder in a liquid layer, 0-5 volume% is more preferable.
The particle size of the powder is preferably 10 nm to 1 μm from the viewpoint of preventing sedimentation, and more preferably 0.5 μm or less.

  In addition, from the viewpoint of design and functionalization, the liquid layer may contain a fluorescent material. It may be a slurry-like liquid layer in which the fluorescent material is dispersed as powder, or a uniform liquid layer in which the fluorescent material is mixed as liquid. Thereby, optical functions, such as light absorption and light emission, can be provided to a glass plate structure.

(Glass plate)
It is preferable that the glass plate structure (code "10") according to the present invention be provided with at least a pair of glass plates so as to sandwich the liquid layer (code "16") from both sides (FIG. 1). Assuming that one glass plate is a glass plate A (code "11") and the other is a glass plate B (code "12"), when the glass plate A resonates, the glass plate B does not resonate due to the presence of the liquid layer. Or, since the oscillation of the resonance of the glass plate B can be damped, the glass plate structure can have a high loss factor as compared with the case of the glass plate alone.

  It is preferable that the value of the peak top of the resonant frequency of one glass plate A and the other glass plate B is different among two glass plates which comprise said pair of glass plates, and the range of resonant frequency does not overlap Is more preferred. However, even if the range of the resonance frequency of the glass plate A and the glass plate B overlap or the value of the peak top is the same, even if one glass plate resonates due to the presence of the liquid layer, the other glass Since the resonance is canceled to some extent by the vibration of the plate not being synchronized, a high loss factor can be obtained as compared to the case of the glass plate alone.

That is, when the resonance frequency (peak top) of the glass plate A is Qa, the half width of the resonance amplitude is wa, the resonance frequency (peak top) of the other glass plate B is Qb, and the half width of the resonance amplitude is wb, It is preferable to satisfy the relationship of [Formula 1].
(Wa + wb) / 4 <| Qa-Qb | ... [Expression 1]
The difference (| Qa−Qb |) between the resonant frequencies of the glass plate A and the glass plate B becomes larger as the value on the left side in the above [Equation 1] becomes larger, which is preferable because a high loss coefficient can be obtained.

Therefore, it is more preferable to satisfy the following [Formula 1 ′], and it is more preferable to satisfy the following [Formula 1 ′ ′].
(Wa + wb) / 2 <| Qa-Qb | ... [Expression 1 ']
(Wa + wb) / 1 <| Qa−Qb |... [Expression 1 ′ ′]
The resonance frequency (peak top) of the glass plate and the half width of the resonance amplitude can be measured by the same method as the loss coefficient of the glass plate assembly.

  The smaller the difference in mass between the glass plate A and the glass plate B, the better. There is more preferably no difference in mass. When there is a mass difference of the glass plate, the resonance of the lighter glass plate can be suppressed by the heavier glass plate, but it is difficult to suppress the resonance of the heavier glass plate by the lighter glass plate is there. That is, if there is a bias in the mass ratio, it is impossible to cancel each other's vibration due to resonance in principle due to the difference in inertial force.

  The mass ratio of the glass plate A to the glass plate B represented by (glass plate A / glass plate B) is preferably 0.1 to 10.0 (1/10 to 10/1), and 0.8 to 1. 25 (8/10 to 10/8) is preferable, 0.9 to 1.1 (9/10 to 10/9) is more preferable, and 1.0 (10/10) is further preferable.

  The smaller the thickness of each of the glass plate A and the glass plate B, the more easily the glass plates adhere to each other through the liquid layer, and the glass plate can be vibrated with less energy. Therefore, in the case of diaphragm application such as a speaker, the thickness of the glass plate is preferably as thin as possible. Specifically, the plate thickness of each of the glass plate A and the glass plate B is preferably 15 mm or less, more preferably 10 mm or less, still more preferably 5 mm or less, still more preferably 3 mm or less, particularly preferably 1.5 mm or less, 0. 8 mm or less is especially preferable. On the other hand, if it is too thin, the influence of surface defects of the glass sheet becomes remarkable and cracks are likely to occur, and it is difficult to carry out a strengthening treatment, so 0.01 mm or more is preferable, and 0.05 mm or more is more preferable.

  In addition, in the applications for building and vehicle opening members that suppress the generation of noise due to resonance phenomena, the thickness of the glass plate A and the glass plate B is preferably 0.5 to 15 mm, and 0.8 to 10 mm. More preferably, 1.0 to 8 mm is more preferable.

The larger the loss coefficient of the glass plate A and the glass plate B, the larger the vibration attenuation as a glass plate structure, and it is preferable as a diaphragm application. Specifically, the loss coefficient at 25 ° C. of the glass plate is preferably 1 × 10 ⁻⁴ or more, more preferably 3 × 10 ⁻⁴ or more, and still more preferably 5 × 10 ⁻⁴ or more. The upper limit is not particularly limited, but is preferably 5 × 10 ⁻³ or less from the viewpoint of productivity and manufacturing cost. Moreover, it is more preferable that both the glass plate A and the glass plate B have the said loss coefficient.
In addition, the loss coefficient of a glass plate can be measured by the method similar to the loss coefficient in a glass plate structure.

At least one of the glass plate A and the glass plate B is preferable for use as a diaphragm since the higher the longitudinal sound velocity value in the plate thickness direction is, the more the sound reproducibility in the high frequency region is improved. Specifically, the longitudinal sound velocity value of the glass plate is preferably 4.0 × 10 ³ m / s or more, more preferably 5.0 × 10 ³ m / s or more, and 6.0 × 10 ³ m / s or more Is more preferred. The upper limit is not particularly limited, but is preferably 7.0 × 10 ³ m / s or less from the viewpoint of the productivity of the glass plate and the cost of the raw material. Moreover, it is more preferable that both the glass plate A and the glass plate B satisfy | fill the said sound speed value.
In addition, the sound velocity value of a glass plate can be measured by the method similar to the longitudinal wave sound velocity value in a glass plate structure.

Although the composition of the glass plate A and the glass plate B is not particularly limited, for example, the following range is preferable.
SiO ₂ : 40 to 80 mass%, Al ₂ O ₃ : 0 to 35 mass%, B ₂ O ₃ : 0 to 15 mass%, MgO: 0 to 20 mass%, CaO: 0 to 20 mass%, SrO: 0 -20 mass%, BaO: 0-20 mass%, Li ₂ O: 0-20 mass%, Na ₂ O: 0-25 mass%, K ₂ O: 0-20 mass%, TiO ₂ : 0-10 mass % And ZrO ₂ : 0 to 10% by mass. However, the above composition accounts for 95% by mass or more of the whole glass.

The composition of the glass plate A and the glass plate B is more preferably in the following range.
SiO ₂ : 55 to 75% by mass, Al ₂ O ₃ : 0 to 25% by mass, B ₂ O ₃ : 0 to 12% by mass, MgO: 0 to 20% by mass, CaO: 0 to 20% by mass, SrO: 0 -20 mass%, BaO: 0-20 mass%, Li ₂ O: 0-20 mass%, Na ₂ O: 0-25 mass%, K ₂ O: 0-15 mass%, TiO ₂ : 0-5 mass % And ZrO ₂ : 0 to 5% by mass. However, the above composition accounts for 95% by mass or more of the whole glass.

As the specific gravities of the glass plate A and the glass plate B are smaller, the glass plate can be vibrated with less energy. Specifically, the specific gravity of each of the glass plate A and the glass plate B is preferably 2.8 or less, more preferably 2.6 or less, and still more preferably 2.5 or less. The lower limit is not particularly limited, but is preferably 2.2 or more.
The rigidity of the glass plate can be increased as the specific elastic modulus, which is a value obtained by dividing the Young's modulus of the glass plate A and the glass plate B by the density, is greater. Specifically, the specific elastic modulus of each of the glass plate A and the glass plate B is preferably 2.5 × 10 ⁷ m ² / s ² or more, more preferably 2.8 × 10 ⁷ m ² / s ² or more, and 3. 0 × 10 ⁷ m ² / s ² or more is even more preferable. The upper limit is not particularly limited, but is preferably 4.0 × 10 ⁷ m ² / s ² or less.

(Glass plate construction)
The larger the loss factor in the glass sheet structure, the greater the vibration damping, and the loss factor at 25 ° C. of the glass sheet structure according to the present invention is 1 × 10 ⁻² or more, preferably 2 × 10 ^−2. The above, more preferably 5 × 10 ⁻² or more.
In addition, the longitudinal sound velocity value of the glass plate structure in the thickness direction is preferably 4.0 × 10 ³ m / s or more because the reproducibility of high frequency sound is improved when the vibration plate is used as the sound velocity is higher. More preferably, it is 5.0 × 10 ³ m / s or more, and still more preferably 6.0 × 10 ³ m / s or more. Although the upper limit is not particularly limited, it is preferably 7.0 × 10 ³ m / s or less.

When the linear transmittance of the glass plate structure is high, application as a translucent member is possible. Therefore, it is preferable that the visible light transmittance | permeability calculated | required based on Japanese-Industrial-Standards (JIS R 3106-1998) is 60% or more, 65% or more is more preferable, and 70% or more is more preferable.
In addition, as a translucent member, applications, such as an opening member for a transparent speaker, an architecture, and a vehicle, are mentioned, for example.

  It is also useful to match the index of refraction to increase the transmission of the glass sheet construction. That is, the closer the refractive index between the glass plate constituting the glass plate structure and the liquid layer is, the more preferable it is because reflection and interference at the interface are prevented. Above all, the difference between the refractive index of the liquid layer and the refractive index of the pair of glass plates in contact with the liquid layer is preferably 0.2 or less, more preferably 0.1 or less, and still more preferably 0.01 or less. .

  It is also possible to color at least one of the glass plate and the liquid layer that make up the glass plate construction. This is useful when it is desired to impart design to a glass sheet structure, or when desired to have functionality such as IR cut, UV cut, and privacy glass.

The number of glass plates constituting the glass plate structure may be two or more, but three or more glass plates may be used (FIG. 2). In the case of two sheets, even if the glass sheet A and the glass sheet B are three or more, for example, the glass sheet A, the glass sheet B and the glass sheet C (symbol "13") all use different glass compositions Alternatively, glass plates of all the same composition may be used, or glass plates of the same composition and glass plates of different compositions may be used in combination. Among them, it is preferable to use two or more types of glass plates having different compositions from the viewpoint of vibration damping property.
Likewise, the mass and thickness of the glass plate may be all different, all the same, or some different. Among them, it is preferable from the viewpoint of vibration damping that the mass of the glass plate to be configured is the same.

  A physically tempered glass plate or a chemically tempered glass plate can also be used for at least one of the glass plates constituting the glass plate structure. This is useful to prevent the breakage of the glass sheet construction. When it is desired to increase the strength of the glass plate structure, it is preferable to use a glass plate located on the outermost surface of the glass plate structure as a physically strengthened glass plate or a chemically strengthened glass plate. More preferably, it is a glass plate or a chemically strengthened glass plate.

  In addition, it is also useful to use crystallized glass or phase-separated glass as the glass plate from the viewpoint of enhancing the longitudinal sound velocity value and the strength. In particular, when it is desired to increase the strength of the glass plate structure, it is preferable to use a glass plate located on the outermost surface of the glass plate structure as crystallized glass or phase separated glass.

A coating (code "21") or a film (code "22") may be formed on the outermost surface of at least one of the glass sheet structures as long as the effects of the present invention are not impaired (FIG. 3). The application of the coating and the application of the film are suitable, for example, for the prevention of damage.
The thickness of the coating or film is preferably 1⁄5 or less of the thickness of the surface glass plate. For the coating and the film, conventionally known ones can be used, and examples of the coating include water repellent coating, hydrophilic coating, water sliding coating, oil repellent coating, light antireflective coating, thermal barrier coating and the like. Examples of the film include a glass shatterproof film, a color film, a UV cut film, an IR cut film, a heat shielding film, an electromagnetic wave shielding film, a screen film for a projector, and the like.

The shape of the glass plate structure can be appropriately designed depending on the application, and may be a flat plate shape or a curved shape.
In order to increase the output sound pressure level in the low frequency band, it is possible to adopt a structure in which an enclosure or baffle plate is provided to the glass plate structure. Although the material of an enclosure or a baffle plate is not specifically limited, It is preferable to use the glass plate structure of this invention.

A frame (symbol “30”) may be provided on the outermost surface of at least one of the glass sheet structures as long as the effects of the present invention are not impaired (FIGS. 4 and 5). The frame is useful when it is desired to improve the rigidity of the glass sheet structure, or when it is desired to maintain the curved surface shape. As the material of the frame, conventionally known ones can be used. For example, ceramics such as Al ₂ O ₃ , SiC, Si ₃ N ₄ , AlN, mullite, zirconia, yttria, YAG, and single crystal materials, steel, aluminum, Metals and alloy materials such as titanium, magnesium and tungsten carbide, composite materials such as FRP, resin materials such as acryl and polycarbonate, glass materials, wood and the like can be used.
The weight of the frame used is preferably 20% or less of the weight of the glass plate, and more preferably 10% or less.
In addition, a sealing material (symbol "31") can also be provided between the glass plate structure and the frame, and leakage of the liquid layer from the frame can be prevented.

  At least a part of the outer peripheral end of the glass sheet assembly may be sealed with a member that does not disturb the vibration of the glass sheet assembly (FIG. 6). As the sealing material (symbol "31"), highly stretchable rubber, resin, gel or the like can be used.

As the resin for the sealing material, acrylic resin, cyanoacrylate resin, epoxy resin, silicone resin, urethane resin, phenol resin, etc. can be used. As a curing method, one-component type, two-component mixture type, heat curing, ultraviolet curing, visible light curing and the like can be mentioned.
A thermoplastic resin (hot melt bond) can also be used. Examples include ethylene vinyl acetate type, polyolefin type, polyamide type, synthetic rubber type, acrylic type and polyurethane type.
With regard to rubber, for example, natural rubber, synthetic natural rubber, butadiene rubber, styrene butadiene rubber, butyl rubber, nitrile rubber, ethylene propylene rubber, chloroprene rubber, acrylic rubber, chlorosulfonated polyethylene rubber (Hyparon), urethane rubber, silicone rubber Fluororubber, ethylene / vinyl acetate rubber, epichlorohydrin rubber, polysulfide rubber (thiocol), hydrogenated nitrile rubber can be used.
When the thickness t of the sealing material is too thin, sufficient strength can not be secured, and when it is too thick, vibration becomes an obstacle. Therefore, the thickness of the sealing material is preferably 10 μm or more and 5 times or less the total thickness of the glass construct, and more preferably 50 μm or more and thinner than the total thickness of the glass construct.

  The above sealing material 31 is applied to at least a part of the surfaces of the opposing glass plates in order to prevent the separation at the interface between the glass plate and the liquid layer of the glass plate structure, within the range not impairing the effects of the present invention. It can be done (Figure 7, Figure 8). In this case, the area of the sealing material application portion is preferably 20% or less, more preferably 10% or less, and particularly preferably 5% or less of the area of the liquid layer so as not to interfere with vibration. .

  In addition, in order to improve the sealing performance, the edge portion of the glass plate can be processed into an appropriate shape. For example, the contact area between the sealing material and the glass can be increased by C-chamfering (the cross-sectional shape of the glass plate is trapezoidal) or R-chamfering (the cross-sectional shape of the glass is substantially arc-shaped) Can improve the adhesive strength between the sealing material and the glass (FIG. 9).

Furthermore, the present invention includes two or more glass plates, includes a liquid layer between at least a pair of glass plates among the glass plates, and the thickness of the liquid layer is 1 mm or less of the total thickness of the pair of glass plates Is less than 1/10 of the total thickness of the pair of glass plates, and 100 μm or less, preferably 10 μm or less, more preferably 5 μm or less if the total thickness of the pair of glass plates is more than 1 mm. It also relates to a glass sheet construction.
The preferable aspect in this glass plate structure is the same as that of the glass plate structure mentioned above.

<Glass diaphragm structure>
The glass diaphragm structure according to the present invention has a loss coefficient of 1 × 10 ⁻² or more at 25 ° C., and a longitudinal acoustic velocity value of 4.0 × 10 ³ m / s or more in the thickness direction. A structure, at least one vibrator provided in contact with the surface of the glass sheet structure, and at least one parametric speaker provided to be separated from the surface of the glass sheet structure The sound emitting surface of the parametric speaker is provided towards the surface of the glass sheet arrangement. Parametric speakers can be provided such that the emitted sound is directed to the plane of the glass sheet arrangement while being spaced from the plane of the glass sheet arrangement.

  FIG. 10 shows an example of the glass diaphragm structure of the present invention, FIG. 10 (a) is a front view of the glass diaphragm structure, and FIG. 10 (b) is a side view of the glass diaphragm structure. . The glass diaphragm structure 40 of the present embodiment includes a glass plate structure 10, four vibrators 45 provided in contact with the back surface (second main surface) 10b of the glass plate structure 10, and a glass plate structure. The three parametric speakers 47 are provided so as to be separated from the surface (first main surface) 10 a of the body 10.

  Among the four vibrators 45, two vibrators are supported by the upper support frame 41 and provided in two upper corner regions of the back surface 10b. The other two vibrators of the four vibrators 45 are supported by the lower support frame 43 and provided in two lower corner regions of the back surface 10b. Therefore, although a total of four vibrators 45 are provided in the entire corner area of the glass plate structure 10, the number of vibrators 45, the arrangement position, and the like are not particularly limited. Alternatively, the vibrator 45 may be provided in contact with the surface 10a.

  The three parametric speakers 47 are arranged side by side in the horizontal direction on the lower support frame 43, and provided so as to be separated from the surface 10a of the glass sheet structure 10 at a predetermined distance. . The number of parametric speakers, the arrangement position, the predetermined distance and the like are not particularly limited, and can be appropriately adjusted to optimum values. The parametric speaker 47 emits a sound wave having a predetermined directivity, and the sound radiation surface of the sound wave is provided toward the surface of the glass plate construction 10 (the surface 10 a in this example). The sound emitting surface does not have to completely face the surface of the glass sheet structure 10. The sound emitted from the parametric speaker 47 may be directed to the surface of the glass sheet structure 10. Moreover, when the glass plate structure 10 displays an imaging | video, the surface 10a is an imaging | video display surface, and the parametric speaker 47 can be provided in the image display surface side.

  FIG. 10 (b) shows the behavior of sound waves radiated from the glass diaphragm structure 40 in addition to the side view of the glass diaphragm structure 40. Due to the action of the four transducers 45, the sound waves emitted from the glass plate structure 10 are so-called omnidirectional sound waves, not sound waves emitted toward a specific region. On the other hand, the sound wave emitted from the parametric speaker 47 is a so-called directional sound wave, typically an ultrasonic wave, and the sound wave emitted from the parametric speaker 47 as described in "perceptible area of sound image" in FIG. The reflected ultrasonic waves are reflected by the surface 10 a of the glass sheet structure 10 and then emitted toward a specific area.

  Therefore, the glass diaphragm structure 40 of this embodiment makes it possible to emit nondirectional sound and directional sound from a single device. That is, for excellent sound reproduction, rich sound expression, etc., it is desirable that the nondirectional sound and the directional sound coexist and emit, but according to the conventional configuration The need for a separate, compatible speaker tends to make the device bulky. Both a nondirectional sound and a directional sound can be emitted by a simple and compact single device such as the glass diaphragm structure 40 of this embodiment. The glass diaphragm structure 40 is used for a speaker, a television, a personal computer, an AV device, a mobile device, and the like. In addition, the glass diaphragm structure 40 is, for example, a device for delivering a plurality of interpretive voices and secondary voices for simultaneous interpretation, a local speaker, a device for realizing a local mute, etc. in a scene where a plurality of viewers are present. It is available. There is no need for headphones, earphones, etc. for each viewer to listen to different sounds individually.

(Diaphragm, opening member)
As a diaphragm, for example, by installing one or more vibration elements and vibration detection elements (vibrators) on one side or both sides of a glass plate structure, it functions as a housing vibration body such as a speaker or mobile device or a housing speaker It can be done. In order to improve the output sound pressure level, it is desirable to install two or more vibration elements on both sides of the glass construction. Generally, it is desirable that the position of the vibrator with respect to the diaphragm be at the center of the structure, but since the material has high sound velocity and high attenuation performance, the vibrator may be installed at the end of the glass structure. By using the diaphragm according to the present invention, it becomes possible to easily reproduce the sound in the high frequency region which has been difficult to reproduce conventionally. In addition, since the degree of freedom in the size, shape, color tone, and the like of the glass plate structure is high and designability can be given, a diaphragm excellent in designability can be obtained. Also, voice or vibration is sampled by a sound collection microphone or vibration detector installed on or near the surface of the glass plate structure, and voice sampled by generating vibrations in the same phase or reverse phase to the glass plate structure. Or the vibration can be amplified or canceled. At this time, if the voice or vibration characteristics at the above sampling points change based on a certain acoustic transfer function until propagating to the glass structure, and the acoustic conversion transfer function exists in the glass structure In this case, by correcting the amplitude and phase of the control signal using the control filter, it is possible to amplify or cancel the vibration with high accuracy. In constructing the control filter as described above, for example, a least squares method (LMS) algorithm can be used.
As a more specific configuration, for example, all or at least one glass plate of double-glazed glass is used as the glass construct of the present invention, and the vibration level of the plate to be controlled flows in between the glass or the glass The sound pressure level of the space is sampled, and after appropriate signal correction by the control filter, the sound wave vibration can be output to the vibration element on the glass construction disposed on the outflow side.
As the application of this diaphragm, for example, as a member for electronic devices, a full range speaker, a speaker for bass reproduction in the 15 Hz to 200 Hz band, a high frequency reproduction speaker for 10 kHz to 100 kHz band, a large speaker having an area of 0.2 m ² or more , Small-sized speakers with a diaphragm area of 3 cm ² or less, flat-panel speakers, cylindrical speakers, transparent speakers, cover glass for mobile devices that functions as a speaker, cover glass for TV displays, and faces with the same video and audio signals. It can be used for a display resulting from the above, a speaker for a wearable display, an electronic display, a lighting fixture, and the like. In addition, it can be used as a diaphragm for a microphone or a vibration sensor.
It can be used as an on-vehicle / vehicle-mounted speaker as a vibration member for interior of a transport machine such as a vehicle. For example, it can be a side mirror serving as a speaker, a sun visor, an instrument panel, a dashboard, a ceiling, a door, and other interior panels. These can also function as a microphone and a diaphragm for active noise control.
Other applications include diaphragms for ultrasonic generators, sliders for ultrasonic motors, low frequency generators, vibrators for propagating sonic vibration in liquid, and water tanks and containers using them, vibrators, vibration detecting elements Can be used as an actuator material for a vibration damping device.

As an opening member, the opening member used for a building / transport machine etc. is mentioned, for example. For example, in the case of using a glass sheet structure that does not easily resonate in a frequency band of noise generated from a drive unit such as a vehicle, aircraft, ship, generator, etc., the generation suppression effect particularly excellent against the noise is obtained. Is possible. Moreover, functions, such as IR cut, UV cut, coloring, can also be provided to a glass plate structure.
When applied to the opening member, a diaphragm in which one or more vibration elements or vibration detection elements (oscillators) are provided on one side or both sides of the glass plate structure can also function as a speaker or a microphone. By using the glass plate structure according to the present invention, it is possible to easily reproduce the sound in the high frequency region which has been difficult to reproduce conventionally. In addition, since the degree of freedom in the size, shape, color tone, and the like of the glass plate construction is high and designability can be given, an opening member excellent in designability can be obtained. Also, voice or vibration is sampled by a sound collection microphone or vibration detector installed on or near the surface of the glass plate structure, and voice sampled by generating vibrations in the same phase or reverse phase to the glass plate structure. Or the vibration can be amplified or canceled.
More specifically, it can be used as an in-vehicle speaker, an out-vehicle speaker, a vehicle windshield having a sound insulation function, a side glass, a rear glass or a roof glass. At this time, only a specific sound wave vibration may be transmitted or blocked. Moreover, it can also be used as a window for vehicles, a structural member, and a decorative board which improved water repellency, snow resistance, ice resistance and antifouling property by sonic vibration. Specifically, it can be used as a lens, a sensor, and their cover glass other than a window glass and a mirror for automobiles.
As an opening member for construction, a window glass functioning as a diaphragm and a vibration detection device, a door glass, a roof glass, an interior material, an exterior material, a decoration material, a structural material, an outer wall, a sound insulation plate and a sound insulation wall, and a cover glass for solar cells It can be used as You may make them function as an acoustic reflection (reflex) board. In addition, the above-mentioned water repellency, snow resistance, and stain resistance can be improved by sound wave vibration.

(Parametric speaker)
A parametric speaker is disposed apart from the sound emission surface of the diaphragm, and the directional sound from the parametric speaker is emitted and reflected toward the sound emission surface of the diaphragm. Thereby, the nondirectional sound from the diaphragm and the directional sound from the parametric speaker can be simultaneously radiated from the sound emission surface of one diaphragm. As a result, it is possible to cause the directional sound from the parametric speaker to reach only a predetermined space area at the same time while emitting the nondirectional sound from one diaphragm.
Here, the directional sound can be made to reach only an arbitrary space area by setting a mechanism for emitting and reflecting the ultrasonic wave emitted from the parametric speaker to an arbitrary position of the sound emission surface of the diaphragm.
The parametric speaker may be, for example, one having a structure in which a plurality of ultrasonic arrays having a tilt mechanism are arranged, but the type is not particularly limited. In addition, a single focus projector can also be used.

(Method of manufacturing glass plate structure)
The glass plate structure according to the present invention can be obtained by forming a liquid layer between a pair of glass plates.
The method of forming a liquid layer between a pair of glass plates is not particularly limited. For example, a method of forming a liquid layer on the surface of a glass plate and placing another glass plate thereon, each glass having a liquid layer formed on the surface The method of bonding plates together, the method of pouring in a liquid layer from the clearance gap of two glass plates, etc. are mentioned.

  It does not specifically limit about formation of a liquid layer, For example, application | coating of the liquid which comprises a liquid layer on a glass plate surface, spraying, etc. are mentioned.

  EXAMPLES Although an Example is given to the following and this invention is concretely demonstrated to it, this invention is not limited to these.

<Evaluation method>
(Young's modulus, longitudinal sound velocity value, density)
The Young's modulus E and the sound velocity V of the glass plate, and the longitudinal wave velocity value V of the glass plate structure are Japanese Industrial Standard (JIS-R1602) using test pieces of 60 mm in length, 12 mm in width, and 0.5 mm to 1 mm in thickness. It measured at 25 degreeC by the ultrasonic pulse method described in -1995) (OLYMPUS CORPORATION DL35PLUS is used). The sound velocity value of the glass plate structure was measured as the sound velocity in the thickness direction.
The density ρ of the glass plate was measured at 25 ° C. by the Archimedes method (AUX 320, manufactured by Shimadzu Corporation).

(Resonance frequency)
The loss coefficient of the glass plate and the glass plate structure was measured at 25 ° C. by a resonance method internal friction measurement device (Nippon Techno Plus Co., Ltd., JE-HT) using the same test piece as the above measurement. Specifically, by continuously applying an alternating voltage to the test piece in a band of 600 Hz to 3000 Hz, the glass substrate was bent freely in the primary mode, and the change in the vibration amplitude was measured. The frequency at which the vibration amplitude h becomes maximum is taken as the resonance frequency f.

(Loss factor)
The loss factor is represented by W / f using the resonant frequency f of the material determined by the above measurement and the frequency width W of a point which is −3 dB lower than the maximum amplitude (that is, a point at the maximum amplitude −3 [dB]) The value is taken as the loss factor.
For a test piece to which the above method can not be applied because the peak shape becomes asymmetric, etc., the attenuation time of the vibration amplitude when the excitation is stopped from the resonance state is measured in the resonance frequency measurement, and this is used for loss The coefficients were calculated.

(Coefficient of viscosity)
The viscosity coefficient of the liquid layer was measured at 25 ° C. using a rotational viscometer (BROOK FIELD, RVDV-E).

(surface tension)
The surface tension of the liquid layer was measured by the following method.
A metal ring suspended in parallel to the test solution at 25 ° C. was immersed in the solution, and then the ring was gradually pulled up in the vertical direction. At this time, the surface tension value was calculated by measuring the peak of the force applied by the liquid film.

Example 1
Prepare a glass plate 1 of 12 mm × 60 mm × 0.5 mm as the glass plate A, apply ion exchange water as a liquid layer, and adhere the glass plate 2 of 12 mm × 60 mm × 0.5 mm as the glass plate B. A glass plate construction of 12 mm × 60 mm × 1 mm was obtained. The composition (mass%) and physical property values of the glass plate 1 and the glass plate 2 are shown below. (Glass plate 1) SiO ₂ : 60%, Al ₂ O ₃ : 17%, B ₂ O ₃ : 8%, MgO: 3%, CaO: 4%, SrO: 8%, density: 2.5 g / cm ³ Young's modulus: 77 GPa, specific modulus of elasticity: 3.1 × 10 ⁷ m ² / s ² (glass plate 2) SiO ₂ : 61.5%, Al ₂ O ₃ : 20%, B ₂ O ₃ : 1.5 %, MgO: 5.5%, CaO: 4.5%, SrO: 7%, density: 2.7 g / cm ³ , Young's modulus: 85 GPa, specific modulus: 3.2 × 10 ⁷ m ² / s ²

Examples 2 to 12
A glass plate assembly was obtained in the same manner as in Example 1 except that the liquid layer was changed. In Example 6, the glass plate 1 was used instead of the glass plate 2 of the glass plate B.

<Comparative Examples 1 to 4>
The various characteristics evaluation in the single-piece | unit of the glass plate 1 (comparative example 1), the glass plate 2 (comparative example 2), an acrylic resin (comparative example 3), and an alumina sintered compact (comparative example 4) as glass plate A was performed.

Comparative Examples 5 and 6
The glass plate structure which stuck the glass plate B to the glass plate A without using a liquid layer was obtained (comparative example 5). Moreover, the glass plate structure obtained by the comparative example 5 was heated at 900 degreeC under air | atmosphere atmosphere, and the glass plate structure which fuse | melted the glass plate A and the glass plate B was obtained (comparative example 6).

<Comparative Examples 7 to 10>
The glass plate structure which fixed the glass plate A and the glass plate B using the various adhesives or films instead of the liquid layer was obtained, respectively.

Table 1 shows the configuration and evaluation results of the glass plate components obtained in Examples 1 to 12, and Table 2 shows the configuration and evaluation results of the glass plate components obtained in Comparative Examples 1 to 10. In the table, 10 [lambda]-2 indicated by * shows the ^10-2 becomes numerical units.

The viscosity coefficient is 0.7 mPa · s to 60 Pa · s, the surface tension is 21 to 73 mN / m, the thickness of the liquid layer is less than 5 μm, and 1/10 or less of the total thickness of the pair of glass plates For glass sheet structures, the longitudinal acoustic velocity values in the thickness direction are all 6.0 × 10 ³ m / s or more, and the loss coefficient at 25 ° C. is 1.7 × 10 ⁻² or more. It was characteristic.
In addition, as a pair of glass plates, those having a combination (glass plate 1 + glass plate 2) of different types of glass plate A and glass plate B have better vibration damping than those of the same combination (glass plate 1 + glass plate 1) The characteristics were shown (see, eg, Examples 5 and 6).

On the other hand, when a single glass plate and an alumina sintered body were used (comparative examples 1, 2 and 4), the longitudinal sound velocity value was at least 6.0 × 10 ³ m / s, but the loss at 25 ° C. The coefficient was low at 1 × 10 ^-3 or less and it was not suitable as a diaphragm. When an acrylic resin was used (comparative example 3), the value of the loss coefficient at 25 ° C. was 2.2 × 10 ⁻² , but the longitudinal sound velocity value was as low as 2.7 × 10 ³ m / s.
In the case of not using a dopant (comparative example 5), the value of the loss coefficient at 25 ° C. is as low as 1.4 × 10 ⁻³ , and the acoustic wave can not be sufficiently transmitted between the glass substrates, and the diaphragm Not suitable as. When the glass plate A and the glass plate B were fused at 900 ° C. (Comparative Example 6), the loss factor was as low as that of the single plate.
When a solid is used as the dopant and the film thickness is 25 μm or less and 1/10 or less of the total thickness of the pair of glass plates (Comparative Examples 7 to 10), the loss coefficient is low in all cases, and as a diaphragm It was not suitable.

<Example of directivity>
Next, as shown in FIG. 11, a microphone 50 is placed at a distance of 1 m from the parametric speaker 47 for the demodulated wave of the ultrasonic wave emitted from the parametric speaker 47, and the directivity at this point is measured by a precision sound level meter did. When a single sine wave with a frequency of 1 kHz was input to the parametric speaker, the sound pressure decreased by 6.7 dB at an angle of 30 degrees from the radiation direction, showing high directivity.

Next, as shown in FIG. 12, a parametric speaker 47 was installed at a position 20 cm away from the surface of the glass plate construction 10 of Example 10, so that the glass plate construction 10 could be irradiated with ultrasonic waves. Here, the angle between the normal direction of the surface of the glass sheet structure 10 and the radiation direction of the ultrasonic wave is set to 10 degrees, and the directivity of the demodulated wave of the ultrasonic wave reflected on the surface of the glass sheet structure 10 is It measured with a precision sound level meter.
When a single sine wave having a frequency of 1 kHz was input to the parametric speaker 47, the sound pressure was reduced by 7.0 dB at an angle of 30 degrees from the reflected wave, and high directivity was exhibited. According to this test, as shown in FIG. 12, the ultrasonic wave from the parametric speaker 47 is reflected by the glass plate structure 10 (that is, the structure according to the glass diaphragm structure of the present invention). It is understood that high directivity can be obtained as compared with the case of emitting ultrasonic waves from 47.

  The glass diaphragm structure according to the present invention can emit both directional sound and nondirectional sound. Therefore, it can be suitably used as a speaker, a diaphragm for use in a television, a personal computer, an AV device, a mobile device, etc., and an opening member for construction and vehicles.

10 Glass plate structure 11 Glass plate A
12 Glass plate B
13 Glass plate C
16 liquid layer 21 coating 22 film 30 frame (frame)
31 seal material 40 glass diaphragm structure 45 vibrator 47 parametric speaker

Claims (21)

A glass plate structure having a loss coefficient of 1 × 10 ⁻² or more at 25 ° C. and a longitudinal wave velocity value of 4.0 × 10 ³ m / s or more in the thickness direction,
At least one transducer provided in contact with the surface of the glass sheet assembly;
At least one parametric speaker provided spaced from the plane of the glass sheet assembly;
The glass diaphragm structure provided with the sound radiation surface of the said parametric speaker toward the surface of the said glass plate structure.   The glass diaphragm structure according to claim 1, wherein the glass plate structure includes two or more glass plates, and includes a liquid layer between at least a pair of glass plates of the glass plates. The thickness of the liquid layer is
When the total thickness of the pair of glass plates is 1 mm or less, it is 1/10 or less of the total thickness of the pair of glass plates,
The glass diaphragm structure of Claim 2 which is 100 micrometers or less, when the total thickness of a pair of said glass plate is more than 1 mm. The viscosity coefficient of the liquid layer at 25 ° C. is 1 × 10 ⁻⁴ to 1 × 10 ³ Pa · s, and the surface tension at 25 ° C. is 15 to 80 mN / m. Glass diaphragm construction. At least specific modulus of the pair of glass plates together, is ^{2.5 × 10 7 m 2 / s} 2 or more, the glass diaphragm construction according to claim 2 of the glass plate. Of the two glass plates constituting the pair of glass plates, the resonance frequency of one glass plate A is Qa, the half width of the resonance amplitude is wa, the resonance frequency of the other glass plate B is Qb, and the half of the resonance amplitude The glass diaphragm structure in any one of Claims 2-5 which satisfy | fill the relationship of following [Formula 1], when value width is set to wb.
(Wa + wb) / 4 <| Qa-Qb | ... [Expression 1]   The glass diaphragm structure in any one of Claims 2-6 whose mass ratio of two glass plates which comprise the said pair of glass plate is 0.1-10.0.   The glass diaphragm structure in any one of Claims 2-7 whose thickness of two glass plates which comprise the said pair of glass plate is 0.01-15 mm, respectively.   The glass diaphragm according to any one of claims 2 to 8, wherein the liquid layer contains at least one selected from the group consisting of propylene glycol, dimethyl silicone oil, methylphenyl silicone oil, methyl hydrogen silicone oil and modified silicone oil. Structure.   The glass diaphragm structure in any one of Claims 2-9 containing three or more glass plates.   The glass diaphragm structure in any one of Claims 2-10 by which at least 1 sheet among the said glass plates and at least any one of the said liquid layer were colored.   The glass diaphragm structure in any one of Claims 2-11 which contains a fluorescent material in the said liquid layer.   The glass diaphragm structure in any one of Claims 2-12 whose difference of the refractive index of the said liquid layer and the refractive index of a pair of glass plate is 0.2 or less all.   The glass diaphragm structure according to any one of claims 1 to 13, wherein the glass sheet structure includes at least one of a physically strengthened glass sheet and a chemically strengthened glass sheet.   The glass diaphragm structure in any one of Claims 1-14 whose visible light transmittance | permeability is 60% or more.   The glass diaphragm structure in any one of Claims 1-15 in which the coating or the film was formed in the outermost surface of at least one of the said glass plate structure.   The glass diaphragm structure in any one of Claims 1-16 whose said glass plate structure is curved-surface shape.   The glass diaphragm structure in any one of Claims 1-17 sealed by the member which does not prevent the vibration of the said glass plate structure at least one part of the outer peripheral end part of the said glass plate structure. Including two or more glass plates, and including a liquid layer between at least one pair of the glass plates,
The thickness of the liquid layer is
When the total thickness of the pair of glass plates is 1 mm or less, it is 1/10 or less of the total thickness of the pair of glass plates,
In the case where the total thickness of the pair of glass plates is more than 1 mm, a glass diaphragm structure having a size of 100 μm or less,
At least one transducer provided in contact with the surface of the glass sheet assembly;
At least one parametric speaker provided spaced from the plane of the glass sheet assembly;
The glass diaphragm structure provided with the sound radiation surface of the said parametric speaker toward the surface of the said glass plate structure. A glass plate structure having a loss coefficient of 1 × 10 ⁻² or more at 25 ° C. and a longitudinal wave velocity value of 4.0 × 10 ³ m / s or more in the thickness direction,
At least one transducer provided in contact with the surface of the glass sheet assembly;
At least one parametric speaker provided spaced from the plane of the glass sheet assembly;
The glass diaphragm structure provided with the radiation sound from the said parametric speaker toward the surface of the said glass plate structure.   The opening member using the glass diaphragm structure in any one of Claims 1-20.

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