Glass diaphragm equipped with vibrator, control system for glass diaphragm equipped with vibrator, and control program for glass diaphragm equipped with vibrator

Abstract

This glass diaphragm equipped with a vibrator has a glass plate structure, and first and second vibrators that are attached to the glass plate structure, the glass diaphragm satisfying the expression 3≤|F1(0)−F2(0)|≤100 [Hz], where F1(0) [Hz] is the lowest resonance frequency of the first vibrator, and F2(0) [Hz] is the lowest resonance frequency of the second vibrator.

Description

Glass vibrating plate with vibrator, glass vibrating plate with vibrator control system, and glass vibrating plate with vibrator control program

[0001] The present disclosure relates to a glass diaphragm with a vibrator, a control system for a glass diaphragm with a vibrator, and a control program for a glass diaphragm with a vibrator.

[0002] In recent years, a technology has been studied that allows a glass plate to function as a speaker by vibrating it.

[0003] Japanese Patent Application Laid-Open Publication No. 2021-180486 discloses an example of generating a predetermined sound by vibrating interior materials or vehicle glass windows. As an example, the publication discloses a configuration in which one or more sound generators are placed on the front glass window to obtain predetermined sound output characteristics.

[0004] However, sound generators such as actuators have a specific minimum resonance frequency F(0), and the resistance near the minimum resonance frequency is higher than the resistance at other frequencies, which causes a delay in the response time in the sound range near the minimum resonance frequency, making it difficult to accurately reproduce sounds near the minimum resonance frequency. For this reason, it has been necessary to specify the specifications of the sound generator to cover a sound range excluding the range near the minimum resonance frequency, making it difficult to ensure a wide sound range to be reproduced.

[0005] The present disclosure aims to provide a glass diaphragm with a vibrator, a control system for a glass diaphragm with a vibrator, and a control program for a glass diaphragm with a vibrator that can achieve acoustic properties over a wide range of sounds with good reproducibility in the range of sounds near the lowest resonant frequency specific to the vibrator.

[0006] The glass vibrating plate with a vibrator according to the present disclosure comprises a glass plate structure, a first vibrator and a second vibrator attached to the glass plate structure, and satisfies 3≦|F1(0)−F2(0)|≦100[Hz], where the lowest resonance frequency of the first vibrator is F1(0) [Hz] and the lowest resonance frequency of the second vibrator is F2(0) [Hz].

[0007] The glass vibrating plate control system with a vibrator according to the present disclosure includes a glass plate structure, and a first vibrator and a second vibrator attached to the glass plate structure, wherein, when the lowest resonance frequency of the first vibrator is F1(0) [Hz] and the lowest resonance frequency of the second vibrator is F2(0) [Hz], 3≦|F1(0)−F2(0)|≦ a glass vibrating plate with a vibrator satisfying 100 [Hz], and an input voltage of the first vibrator required for generating vibrations of a frequency near the lowest resonance frequency F1(0) of the first vibrator by the first vibrator is lowered than an input voltage of the second vibrator required for generating vibrations of a frequency near the lowest resonance frequency F1(0) of the first vibrator by the second vibrator, while increasing the input voltage of the second vibrator corresponding to the vicinity of the lowest resonance frequency F1(0) of the first vibrator so as to compensate for the decrease in the vibration of the frequency near the lowest resonance frequency F1(0) of the first vibrator that was intended to be generated by the first vibrator, and a control device that controls the input voltages of the first and second vibrators so as to lower the input voltage of the second vibrator corresponding to near the lowest resonant frequency F2(0) of the second vibrator, which is required to generate vibrations of a frequency in the vicinity of the lowest resonant frequency F2(0) of the second vibrator, below the input voltage of the first vibrator corresponding to near the lowest resonant frequency F2(0) of the second vibrator, which is required to generate vibrations of a frequency in the vicinity of the lowest resonant frequency F2(0) of the second vibrator by the first vibrator, while increasing the input voltage of the first vibrator corresponding to near the lowest resonant frequency F2(0) of the second vibrator so as to compensate for the decrease in the vibrations of a frequency in the vicinity of the lowest resonant frequency F2(0) of the second vibrator that was intended to be generated by the second vibrator, as the input voltage of the second vibrator decreases.

[0008] The glass diaphragm control program according to the present disclosure is a vibrator attached to a glass plate assembly that constitutes a vibrator-equipped glass diaphragm, and when the respective lowest resonance frequencies are F1(0) [Hz] and F2(0) [Hz], 3≦|F1(0)−F2(0)| ≦ For a first vibrator and a second vibrator satisfying 100 [Hz], the input voltage of the first vibrator required to generate vibrations of a frequency near the lowest resonance frequency F1(0) of the first vibrator by the first vibrator is made lower than the input voltage of the second vibrator required to generate vibrations of a frequency near the lowest resonance frequency F1(0) of the first vibrator by the second vibrator, while the input voltage of the second vibrator corresponding to the vicinity of the lowest resonance frequency F1(0) of the first vibrator is increased so as to compensate for the decrease in the vibrations of the frequency near the lowest resonance frequency F1(0) of the first vibrator that was intended to be generated by the first vibrator, and the input voltage of the first vibrator corresponding to near the lowest resonant frequency F2(0) of the second vibrator, which is required to generate vibrations at a frequency near the lowest resonant frequency F2(0) of the second vibrator, is reduced below the input voltage of the first vibrator corresponding to near the lowest resonant frequency F2(0) of the second vibrator, which is required to generate vibrations at a frequency near the lowest resonant frequency F2(0) of the second vibrator by the first vibrator, while increasing the input voltage of the first vibrator corresponding to near the lowest resonant frequency F2(0) of the second vibrator so as to compensate for the decrease in the vibrations at a frequency near the lowest resonant frequency F2(0) of the second vibrator that was intended to be generated by the second vibrator, as the input voltage of the second vibrator is reduced.

[0009] The glass diaphragm with vibrator, the glass diaphragm with vibrator control system, and the glass diaphragm with vibrator control program disclosed herein can provide acoustics over a wide range of sound, with good reproducibility of the sound range near the lowest resonant frequency specific to the vibrator.

[0010] 1 is a schematic diagram of a glass diaphragm with a vibrator. FIG. 1 is a cross-sectional view of the glass diaphragm with a vibrator as viewed from the side. FIG. 2 is a diagram showing an example of the frequency characteristics of a vibrator. FIG. 3 is a diagram showing an example of an input signal to a vibrator. FIG. 4 is a diagram showing an example of a vibration waveform of 40 [Hz] generated by a vibrator. FIG. 5 is a diagram showing an example of a vibration waveform of 50 [Hz] generated by a vibrator. FIG. 6 is a diagram showing an example of a vibration waveform of 60 [Hz] generated by a vibrator. FIG. 7 is a diagram showing an example of the frequency characteristics of two vibrators. FIG. 8 is a diagram showing an example of the output characteristics of two vibrators. FIG. 9 is a diagram showing an example of the configuration of a glass diaphragm control system. FIG. 10 is a flowchart showing an example of the flow of a glass diaphragm with vibrator control process. FIG. 11 is a diagram showing an example of attaching a vibrator to a glass plate construct. FIG. 12 is a diagram showing another example of attaching a vibrator to a glass plate construct. FIG. 13 is a diagram showing another example of attaching a vibrator to a glass plate construct. FIG. 14 is a diagram showing an example of attaching two vibrators to the same mount unit. FIG. 15 is a diagram showing an example of a mount unit. FIG. 16 is a diagram showing an example of a vehicle. FIG. 17 is a diagram showing an example of attaching a vibrator to a roof glass. FIG. 18 is a diagram showing another example of attaching a vibrator to a roof glass. FIG. 1 is a diagram showing an example of attaching a vibrator to a back door glass; FIG. 2 is a diagram showing another example of attaching a vibrator to a back door glass; FIG. 3 is a diagram showing an example of attaching vibrators to the four corners of the back door glass; FIG. 4 is a diagram showing an example of attaching a vibrator pair to a back door glass; FIG. 5 is a diagram showing an example of attaching a vibrator pair and a vibrator to a back door glass; and FIG. 6 is a diagram showing examples of attaching three types of vibrators to a back door glass.

[0011] The present embodiment will be described below with reference to the drawings. Note that the same components and processes are given the same reference numerals throughout the drawings, and redundant description will be omitted.

[0012] <Configuration of Glass Vibrator 1> Fig. 1 is a schematic diagram of a glass vibrator 1 viewed from the main surface. Fig. 2 is a cross-sectional view of the glass vibrator 1 viewed from the side.

[0013] As shown in Fig. 1, the vibrator-equipped glass vibrating plate 1 of this embodiment is configured to include a glass vibrating plate 2 and vibrators 3, and two vibrators 3 are attached to the glass vibrating plate 2. Hereinafter, when each vibrator is described separately, one vibrator 3 will be referred to as "vibrator 3A" and the other vibrator 3 will be referred to as "vibrator 3B." When there is no need to describe each vibrator separately, they will simply be referred to as "vibrators 3."

[0014] In this embodiment, the configuration of the vibrator-equipped glass diaphragm 1 will be described using an example in which the vibrator-equipped glass diaphragm 1 is applied to a vehicle window glass, but the application of the vibrator-equipped glass diaphragm 1 is not limited to vehicle window glass. The vibrator-equipped glass diaphragm 1 can be applied to window glass of buildings, structures, and mobile objects that form spaces where people can enter, such as window glass for residential buildings and soundproof rooms.

[0015] The glass diaphragm 2 includes a glass plate structure 9. The glass plate structure 9 of the present embodiment may be made of a single glass plate, but is preferably made of laminated glass from the viewpoint of improving the acoustic effect of the glass diaphragm 2.

[0016] FIG. 1 shows an example in which a glass plate structure 9 is attached to a door of a vehicle and used as a side glass that separates the interior space from the exterior space of the vehicle.

[0017] The vibrator 3 is attached to an area A1 below a belt line BL of the glass plate construct 9. Below the glass plate construct 9 refers to the direction of gravity along the surface of the glass plate construct 9 when the glass plate construct 9 is attached to a vehicle door. When the glass plate construct 9 is used as a slidable side glass, the belt line BL corresponds to the lower side of an area A2, which is an opening area when the side glass is attached to a vehicle door and in a fully closed state.

[0018] The structure of the vibrator-equipped glass diaphragm 1 will be described in detail with reference to FIG.

[0019] (Glass Plate Structure 9) In the present embodiment, the glass plate structure 9 is formed of transparent or translucent inorganic glass. However, without being limited thereto, the glass plate structure 9 may be formed of organic glass. Examples of organic glass include PMMA (polymethyl methacrylate)-based resin, PC (polycarbonate)-based resin, PS (polystyrene)-based resin, PET (polyethyleneterephthalate)-based resin, PVC (polyvinyl chloride)-based resin, and cellulose-based resin.

[0020] Furthermore, when the glass plate structure 9 is formed by a laminated glass including a plurality of glass plates, a configuration in which an intermediate layer is sandwiched between a pair of glass plates can be mentioned, but a configuration having three or more glass plates is also acceptable. The thickness of the laminated glass is preferably 1.0 mm or more, more preferably 2.0 mm or more, and even more preferably 3.0 mm or more. This allows the laminated glass to have sufficient strength. Furthermore, the thickness of each glass plate constituting the laminated glass is preferably 5.0 mm or less, more preferably 3.0 mm or less, and even more preferably 2.0 mm or less. Furthermore, the thickness of each glass plate constituting the laminated glass is preferably 0.1 mm or more, more preferably 0.5 mm or more, and even more preferably 1.0 mm or more. The thicknesses of the pair of glass plates may be the same or different.

[0021] The intermediate layer constituting the laminated glass is formed of a transparent resin film such as a polyvinyl butyral (PVB)-based or ethylene-vinyl acetate copolymer (EVA)-based resin film, a silicone (PDMS)-based, polyurethane-based, fluorine-based, polyethylene terephthalate-based, or polycarbonate-based resin film. The intermediate layer may also contain a material that enhances sound insulation and a material that absorbs ultraviolet or infrared rays. Furthermore, the intermediate layer is not limited to the above-mentioned resin film, and examples thereof include a gel layer, an adhesive layer, a liquid layer, a sol layer, and a grease layer. When the above-mentioned resin film is used, the thickness of the intermediate layer may be set to, for example, 1 nm or more and 1.0 mm or less, 0.1 mm or more and 0.9 mm or less, or 0.2 mm or more and 0.8 mm or less.

[0022] (Mounting section 7 and resin layer 8) The mounting section 7 is fixed to one main surface of the glass plate construct 9 via a resin layer 8. In the following description, for convenience, the direction from the glass plate construct 9 toward the mounting section 7 will be referred to as the "upward direction," and the opposite direction will be referred to as the "downward direction." However, the up-down direction referred to here may be a direction different from the up-down direction when the glass diaphragm 2 is assembled to a frame or the like. The mounting section 7 is not essential, and the vibrator 3 may be attached to one main surface of the glass plate construct 9 without the mounting section 7.

[0023] The resin layer 8 has the same outer diameter as the mount portion 7 and is provided over the entire lower surface of the mount portion 7. An adhesive, a pressure-sensitive adhesive, or the like can be appropriately used for the resin layer 8. As the pressure-sensitive adhesive, a sheet-shaped adhesive tape can be used.

[0024] In the present embodiment, the resin layer 8 may be configured to include, for example, an acrylic resin adhesive, but is not limited to this. Furthermore, the mount portion 7 and the glass plate structure 9 may be mechanically fixed. For example, if the glass plate structure 9 is a side glass, a sliding holder (not shown) attached to the lower side of the glass plate structure 9 (see FIG. 1 ) in the region A1 may be used as part of the mount portion 7 for fixation, thereby preventing the vibrator 3 from falling off.

[0025] 2 , the connection portion 6 is provided on the side of the mount portion 7 opposite to the glass plate construct 9. In this embodiment, the glass plate construct 9 is disposed on the lower surface of the mount portion 7, and the connection portion 6 is disposed on the upper surface of the mount portion 7.

[0026] The vibrator 3 that vibrates the glass plate structure 9 is attached to the connection part 6. As an example, the connection part 6 of this embodiment may form the outer shell of the vibrator 3. For example, the vibrator 3 may be assembled with its bottom surface open, and the open bottom surface may be closed by the connection part 6. In other words, a part of the connection part 6 may be configured as a lid that closes a part of the vibrator 3. The vibrator 3 may be attached to the connection part 6 mechanically with screws, bolts, or the like, or may be attached to the connection part 6 with an adhesive or the like.

[0027] (Vibrator 3) The vibrator 3 is connected to a power source (not shown) and vibrates the glass plate construct 9 in accordance with the magnitude of the input voltage. As an example, the vibrator 3 of this embodiment is a voice coil motor including a coil portion and a magnetic circuit, one of the coil portion and the magnetic circuit being fixed to the mount portion 7 and the other being arranged so as to be movable relative to the mount portion 7. When a current flows through the coil portion, vibrations are generated by the interaction between the coil portion and the magnetic circuit, and the glass plate construct 9 is vibrated via the mount portion 7. Note that the vibrator 3 is not limited to a voice coil motor, and any actuator other than a voice coil motor, such as a piezoelectric actuator, may be used as long as it is an actuator that can transmit the desired vibration to the glass plate construct 9.

[0028] In this embodiment, the vibrator-equipped glass vibration plate 1 is described as being applied to a vehicle side glass, but it may also be used in, for example, a vehicle windshield, rear glass, front bench glass, rear quarter glass, roof glass, etc. In particular, when the vibrator-equipped glass vibration plate 1 is used on a fixed window glass other than a side glass having a region A1 that is always hidden, the vibrator 3 may be attached to a light-shielding region formed by providing a shielding layer of black ceramics or the like that blocks visible light around the periphery of the window glass. In this case, it is preferable that the region where the view of the opening of the fixed window glass is blocked by the vibrator 3 can be reduced, and it is even more preferable that the vibrator 3 be positioned so that it completely overlaps the light-shielding region.

[0029] <Control principle of glass vibration plate 1 with vibrator> Noises generated outside the interior space of the vehicle, such as road noise generated when a vehicle runs on a road and noise from the engine or motor that generates the driving force of the vehicle, enter the interior space of the vehicle mainly through the glass plate structure 9.

[0030] Therefore, if the vibrator 3 generates vibrations having a frequency distribution that is in the opposite phase to the frequency distribution of the noise entering the interior space of the vehicle, the noise is canceled out, and the noise in the interior space of the vehicle is reduced compared to before the vibrator 3 is driven.

[0031] This type of noise reduction method is called active noise canceling. In active noise canceling, the vibrator 3 is driven to generate vibrations in the glass plate structure 9 that are in the opposite phase to the noise, so the response time of the vibrator 3 is an important indicator. The response time of the vibrator 3 is an example of a characteristic of the vibrator 3 that is expressed by the time from when the vibrator 3 starts to vibrate until it starts vibrating in response to an input signal. The shorter the time until it starts vibrating in response to an input signal, the better the responsiveness.

[0032] Since vibration of the glass plate structure 9 by the vibrator 3 generates a sound in the opposite phase to the noise, the vibration of the glass plate structure 9 by the vibrator 3 can also be expressed by sound pressure.

[0033] Meanwhile, each object has multiple resonant frequencies F(N), where "N" is an integer equal to or greater than 0 and represents the order of the resonant frequency. Specifically, the resonant frequency F(0) represents the lowest resonant frequency (also referred to as the zeroth-order resonant frequency). Furthermore, the resonant frequencies F(N) for N equal to or greater than 1 represent Nth-order resonant frequencies, which are N+1 times the lowest resonant frequency F(0).

[0034] The resonant frequency F(N) is the frequency at which the resonance of an object reaches a maximum value when a waveform having that frequency is input to the object. The resonance of an object is expressed by changes in vibration, voltage, current, and resistance. For example, if an object is composed of an electric circuit, when an input signal corresponding to a frequency near the resonant frequency F(N) is input to the electric circuit, at least one of the voltage, current, and resistance values ​​representing the characteristics of the electric circuit will reach an extreme value. The vicinity of the resonant frequency F(N) is a frequency band including the resonant frequency F(N), in which a specific physical quantity representing the characteristics of the object that changes in response to the input signal can be considered to change to the same extent as the physical quantity at the resonant frequency F(N).

[0035] Naturally, each vibrator 3 also has a resonant frequency F(N). Of the resonant frequencies F(N), the frequency that most strongly induces a resonance phenomenon in an object is the lowest resonant frequency F(0). The resonance phenomenon due to the Nth-order resonant frequency (N is 1 or more) is smaller than the resonance phenomenon due to the lowest resonant frequency F(0). Therefore, hereinafter, the characteristics of the vibrator 3 will be explained, focusing on the lowest resonant frequency F(0) of the vibrator 3.

[0036] 3 is a diagram showing an example of the frequency characteristics of the vibrator 3. The horizontal axis of the frequency characteristics 11 in FIG.

[0037] When an input signal corresponding to a frequency near the lowest resonance frequency F(0) is input to the vibrator 3, the resistance value of the vibrator 3 near the lowest resonance frequency F(0) increases significantly compared to the resistance value of the vibrator 3 at other frequencies. If the magnitude of the current supplied to the vibrator 3 is constant, the response time of the vibrator 3 deteriorates compared to the response time of the vibrator 3 at other frequencies as the resistance value of the vibrator 3 increases.

[0038] 3, the lowest resonance frequency F(0) of the vibrator 3 having the frequency characteristic 11 is 48 [Hz]. Therefore, the vibrator 3 having the frequency characteristic 11 shown in FIG. 3 has poorer responsiveness to input signals corresponding to frequencies around 48 [Hz] compared to other frequencies.

[0039] The responsiveness of the vibrator 3 will be specifically described with reference to FIGS. 4, 5A, 5B, and 5C.

[0040] Fig. 4 is a diagram showing an example of an input signal to the vibrator 3 having the frequency characteristic 11 shown in Fig. 3. Figs. 5A, 5B, and 5C are diagrams showing examples of vibration waveforms when the input signal shown in Fig. 4 is input to the vibrator 3 having the frequency characteristic 11 shown in Fig. 3.

[0041] The vibration waveform examples shown in Figures 5A, 5B, and 5C are waveforms measured by an acceleration sensor (NP-3200, manufactured by Ono Sokki Co., Ltd.: not shown) attached to one main surface of the glass plate structure 9, which is different from the other main surface to which the vibrator 3 is attached. Specifically, a drive signal is output from a real-time acoustic vibration analysis system (DS-3200, manufactured by Ono Sokki Co., Ltd.: not shown) to the vibrator 3, and the measurement signal from the acceleration sensor is measured by the real-time acoustic vibration analysis system. Note that the real-time acoustic vibration analysis system can output drive signals of various waveforms, such as sine waves, burst waves, and impulse waves, having any frequency and voltage, to the vibrator 3. When there is one vibrator 3, it is preferable to attach the acceleration sensor at a position facing the vibrator 3 across the glass plate structure 9. When there are multiple vibrators 3, it is preferable to attach the acceleration sensors at positions as equidistant as possible from each vibrator 3.

[0042] As shown in Fig. 4, a tone burst signal 12 was used as an input signal to the vibrator 3. Fig. 5A is an example of a vibration waveform of 40 [Hz] generated by the vibrator 3, Fig. 5B is an example of a vibration waveform of 50 [Hz] generated by the vibrator 3, and Fig. 5C is an example of a vibration waveform of 60 [Hz] generated by the vibrator 3. The horizontal axis of each vibration waveform example in Fig. 5A, Fig. 5B, and Fig. 5C represents time [sec], and the vertical axis represents acceleration [m / s ２ ].

[0043] 5A and 5C, from the start of vibration due to the tone burst signal 12, vibration is generated with an acceleration proportional to the magnitude of the voltage of the tone burst signal 12. On the other hand, referring to the example vibration waveform of the vibrator 3 shown in Fig. 5B, at the start of vibration due to the tone burst signal 12, vibration smaller than the vibration corresponding to the magnitude of the voltage of the tone burst signal 12 is generated, and a "delay" phenomenon is observed in which the vibration then increases.

[0044] As described above, the response time of the vibrator 3 near the lowest resonance frequency F(0) is worse than the response time in frequency bands other than the lowest resonance frequency F(0). This deterioration (delay) in response time near the lowest resonance frequency F(0) is more noticeable than the delay in response time at resonance frequencies equal to or higher than the resonance frequency F(1). Therefore, in order to achieve acoustic reproduction over a wide range of sound, including low frequencies, it is very important to achieve an improvement in response near the lowest resonance frequency F(0).

[0045] It is known that the lowest resonance frequency F(0) of the vibrator 3 varies depending on the characteristics of the components that make up the vibrator 3. The lowest resonance frequency F(0) of the vibrator 3 is expressed, for example, by equation (1). In equation (1), "K" is a spring constant that represents the strength of the repulsive force of the vibrator 3, and "M" is the mass of the vibrating part of the vibrator 3 that is connected to the glass plate structure 9 via a spring. There are various types of vibrating parts of the vibrator 3, including, for example, one in which the housing that makes up the outer shell of the vibrator 3 vibrates, one in which the magnet vibrates, and one in which both vibrate.

[0046]

[0047] Equation (1) means that the minimum resonance frequency F(0) of the vibrator 3 changes by changing at least one of the spring constant K and the mass M of the vibrating part. Therefore, the deterioration of the responsiveness of the vibrator 3 near the minimum resonance frequency F(0) can be resolved by attaching multiple vibrators 3 with different minimum resonance frequencies F(0) to one glass plate structure 9, as shown in FIG. 1. The multiple vibrators 3 may be attached to one main surface of the glass plate structure 9, or vibrator 3A may be attached to one main surface and vibrator 3B may be attached to the other main surface. However, attaching multiple vibrators 3 to one main surface (only) is preferable because it allows the vibrator-equipped glass diaphragm 1 to be low-profile.

[0048] 1 will be referred to as the "lowest resonance frequency F(0)" and the lowest resonance frequency F(0) of the vibrator 3A will be referred to as the "lowest resonance frequency F1(0)", and the lowest resonance frequency F(0) of the vibrator 3B will be referred to as the "lowest resonance frequency F2(0)". Furthermore, when it is not necessary to distinguish between the lowest resonance frequency F1(0) and the lowest resonance frequency F2(0), they will be referred to as the lowest resonance frequency F(0) as before.

[0049] Fig. 6 is a diagram showing example frequency characteristics of vibrator 3A and vibrator 3B. The horizontal axis of Fig. 6 represents frequency [Hz], and the vertical axis represents internal impedance [Ω] of vibrator 3. Furthermore, frequency characteristic 11A in Fig. 6 represents example frequency characteristics of vibrator 3A. Furthermore, frequency characteristic 11B in Fig. 6 represents example frequency characteristics of vibrator 3B. In the example shown in Fig. 6, the lowest resonance frequency F1(0) is smaller than the lowest resonance frequency F2(0), but the lowest resonance frequency F1(0) may also be larger than the lowest resonance frequency F2(0).

[0050] Note that vibrators 3A and 3B are vibrators 3 having a minimum resonance frequency F(0) of 200 Hz or less. The reason for using vibrators 3 having a minimum resonance frequency F(0) of 200 Hz or less is that the glass plate structure 9 is difficult to vibrate at frequencies below the minimum resonance frequency F(0). For example, if the minimum resonance frequency F(0) of the vibrator 3 is 500 Hz, it would be difficult to vibrate the glass plate structure 9 at frequencies below 500 Hz. Therefore, using a vibrator 3 having a minimum resonance frequency F(0) of 200 Hz or less is preferable from the viewpoint of generating as low a bass sound as possible using the vibrator 3. Furthermore, the minimum resonance frequency F(0) of the vibrator 3 used in the vibrator-equipped glass diaphragm 1 is preferably 120 Hz or less, and more preferably 100 Hz or less.

[0051] When the glass plate structure 9 is laminated glass, it is designed to have a high damping coefficient and suppress resonant vibration, and therefore the lower and upper limits of the minimum resonance frequency F(0) of the vibrator 3 used in the vibrator-equipped glass diaphragm 1 are not particularly specified. For example, the lower limit of the minimum resonance frequency F(0) of the vibrator 3 used in the vibrator-equipped glass diaphragm 1 may be 180 [Hz] or less, 150 [Hz] or less, 120 [Hz] or less, or 100 [Hz] or less. Furthermore, it may be 20 [Hz], which is the lower limit of the human audible range, or less.

[0052] When the lowest resonance frequency F1(0) of vibrator 3A and the lowest resonance frequency F2(0) of vibrator 3B are different, the input voltage of vibrator 3A is lowered near the lowest resonance frequency F1(0), and instead the input voltage of vibrator 3B is increased. As a result, vibrations having a frequency near the lowest resonance frequency F1(0) are relatively obtained by vibrator 3B, and the linearity of the sound quality can be maintained. Because the lowest resonance frequency F2(0) of vibrator 3B is different from the lowest resonance frequency F1(0) of vibrator 3A, the deterioration of the responsiveness of vibrator 3A near the lowest resonance frequency F1(0) can be compensated for by vibrator 3B.

[0053] On the other hand, near the lowest resonance frequency F2(0), instead of lowering the input voltage to vibrator 3B, the input voltage to vibrator 3A is increased. As a result, vibrations having a frequency near the lowest resonance frequency F2(0) are relatively obtained by vibrator 3A, and the linearity of the sound quality can be maintained. Because the lowest resonance frequency F1(0) of vibrator 3A is different from the lowest resonance frequency F2(0) of vibrator 3B, the deterioration of the responsiveness of vibrator 3B near the lowest resonance frequency F2(0) can be compensated for by vibrator 3A.

[0054] 7 is a diagram showing an example of the output characteristics of the vibrator 3A and the vibrator 3B when the input voltage is adjusted as described above. Curve 16 in Fig. 7 shows an example of the output characteristics of the vibrator 3A. Curve 17 in Fig. 7 shows an example of the output characteristics of the vibrator 3B.

[0055] At the lowest resonance frequency F1(0), the input voltage to vibrator 3A is lowered while the input voltage to vibrator 3B is increased, so that vibrations corresponding to the lowest resonance frequency F1(0) are mainly generated by vibrator 3B. At the lowest resonance frequency F2(0), the input voltage to vibrator 3B is lowered while the input voltage to vibrator 3A is increased, so that vibrations corresponding to the lowest resonance frequency F2(0) are mainly generated by vibrator 3A.

[0056] If the difference between the lowest resonance frequency F1(0) of vibrator 3A and the lowest resonance frequency F2(0) of vibrator 3B is too small, the vicinity of the lowest resonance frequency F1(0) and the vicinity of the lowest resonance frequency F2(0) will overlap, making it difficult to improve responsiveness using vibrators 3 with different minimum resonance frequencies F(0). On the other hand, if the difference between the lowest resonance frequency F1(0) of vibrator 3A and the lowest resonance frequency F2(0) of vibrator 3B is too large, the lowest resonance frequency F1(0) or the lowest resonance frequency F2(0) will exceed 200 [Hz], reducing the processing speed of the control device 20. Therefore, it is preferable that the difference between the lowest resonance frequency F1(0) of vibrator 3A and the lowest resonance frequency F2(0) of vibrator 3B be 3 [Hz] ≦ |F1(0) - F2(0)| ≦ 100 [Hz]. Furthermore, the difference is more preferably 4 [Hz]≦|F1(0)−F2(0)|≦50 [Hz], and even more preferably 5 [Hz]≦|F1(0)−F2(0)|≦20 [Hz].

[0057] <Configuration of the glass diaphragm with vibrator control system 10> Fig. 8 is a diagram showing an example of the configuration of the glass diaphragm with vibrator control system 10. The glass diaphragm with vibrator control system 10 controls the input voltage to the vibrator 3A and the vibrator 3B in the vicinity of the minimum resonance frequency F(0) as described above, and includes the glass diaphragm with vibrator 1 and a control device 20.

[0058] The control device 20 includes a DSP (Digital Signal Processor) 21 , a memory 22 , a DA converter (Digital-to-Analog Converter: DAC) 23 , and an amplifier (AMP) 24 .

[0059] The DSP 21 of the control device 20 is an example of a processor that controls the input voltages of the vibrators 3 A and 3 B. The DSP 21 is connected to the memory 22 via a first internal bus 25 A and is connected to the DAC 23 via a second internal bus 25 B.

[0060] The memory 22 is composed of a RAM and a non-volatile memory. The RAM is an example of a storage device used as a temporary work area for the DSP 21. The non-volatile memory is an example of a storage device that maintains stored information even if the power supplied to the non-volatile memory is cut off, and for example, a semiconductor memory is used.

[0061] The DAC 23 outputs a voltage corresponding to the value of the input voltage to the vibrator 3, which is specified as a digital value by the DSP 21. For example, if the maximum input voltage to the vibrator 3 is 100 [V] and the maximum output voltage of the DAC 23 is 1 [V], when 50 [V] is specified as the input voltage to the vibrator 3, the voltage corresponding to the value of the input voltage to the vibrator 3 is 0.5 [V]. The input voltage range of the vibrator 3 is 0.01 [V] or more and 100 [V] or less. In this manner, the DSP 21 converts digital information into analog information using the DAC 23. A DSP 21 is provided for each vibrator 3. In this embodiment, the DAC 23 for the vibrator 3A is referred to as DAC 23A, and the DAC 23 for the vibrator 3B is referred to as DAC 23B.

[0062] The AMP 24 amplifies the voltage input from the DAC 23 via the third internal bus 25C to the value of the input voltage to the vibrator 3 specified by the DSP 21. Like the DAC 23, an AMP 24 is provided for each vibrator 3. In this embodiment, the AMP 24 for the vibrator 3A is represented as AMP 24A, and the AMP 24 for the vibrator 3B is represented as AMP 24B.

[0063] The voltage amplified by the AMP 24A is input to the transducer 3A via the first connection cable 26A, and the voltage amplified by the AMP 24B is input to the transducer 3B via the second connection cable 26B.

[0064] As a result, the input voltages specified by the DSP 21 are input to the vibrators 3A and 3B. The control device 20 is configured by a computer including the DSP 21 and the memory 22, for example.

[0065] <Control Process of Glass Vibrating Plate with Vibrator> Next, a control process of a glass vibrating plate with vibrator executed by the control device 20 will be described.

[0066] FIG. 9 is a flowchart showing an example of the flow of the vibrator-equipped glass diaphragm control process executed by the DSP 21 of the control device 20 when the vibrator 3 is caused to generate vibrations at a frequency near the lowest resonance frequency F(0).

[0067] A control program for the glass diaphragm with vibrator, which defines the control process for the glass diaphragm with vibrator, is stored in advance in, for example, a nonvolatile memory constituting the memory 22 of the control device 20. The DSP 21 of the control device 20 reads the control program for the glass diaphragm with vibrator stored in the nonvolatile memory and executes the control process for the glass diaphragm with vibrator.

[0068] Hereinafter, as an example, a case where vibrations of a frequency near the lowest resonance frequency F1(0) of the vibrator 3A are generated in the vibrator 3 will be described.

[0069] First, in step S10, the DSP 21 sets the voltage sharing ratio for each transducer 3 according to a predetermined ratio. For example, for frequencies other than the resonant frequency, desirable acoustic performance can be achieved by correction using equalization, a band-pass filter, or the like, without significantly changing the ratio between the transducers 3A and 3B. The ratio and each voltage sharing ratio are stored in advance in, for example, a non-volatile memory constituting the memory 22. The ratio and each voltage sharing ratio are parameters that can be changed by the user. The ratio is not limited to a value that results in the same sound pressure and acceleration shared by each transducer 3. For example, the ratio between the transducers 3A and 3B may be a value that provides a difference in the voltage applied for each frequency, such as a ratio of 1:1.5 or 2:1. Here, as an example, a case will be described in which the ratios between the transducers 3A and 3B are set to the same ratio.

[0070] In step S20, the DSP 21 reduces the voltage shared by the vibrator 3A below the voltage shared by the vibrator 3B. Meanwhile, the DSP 21 increases the voltage shared by the vibrator 3B to compensate for the decrease in the voltage shared by the vibrator 3A. For example, if the voltages shared by the vibrators 3A and 3B are each 5 [V], the DSP 21 reduces the voltage shared by the vibrator 3A by 4 [V] and increases the voltage shared by the vibrator 3B by 4 [V]. As a result, the voltage shared by the vibrator 3A becomes 1 [V] and the voltage shared by the vibrator 3B becomes 9 [V]. The updated voltage shared by each vibrator 3 calculated by the processing of step S20 is called a target voltage. The DSP 21 controls the target voltage of each vibrator 3 so that it falls within a range of 0.01 [V] to 100 [V].

[0071] Here, as an example, the variation from the initial voltage allocation of vibrator 3A and the variation from the initial voltage allocation of vibrator 3B are set to the same value, but the variation from the initial voltage allocation of each vibrator 3 does not necessarily have to be the same. In particular, when vibrating glass, points that are physically easy and difficult to vibrate are determined not only by the performance of vibrator 3 but also by the vibration position, and equal ratio correction does not necessarily produce correct results at all positions and frequencies. The DSP 21 may set the target voltages of vibrators 3A and 3B so that the difference between the variation from the initial voltage allocation of vibrator 3A and the variation from the initial voltage allocation of vibrator 3B falls within an allowable range in which it can be considered that the difference is the same.

[0072] Specifically, for example, if the allowable range is 0.5 [V], and the absolute value of the difference in the fluctuation from the initial voltage allocation of each vibrator 3 is 0.5 [V] or less, the target voltage of vibrator 3B will be an input voltage that compensates for the decrease from the initial voltage allocation of vibrator 3A. The voltage value within the allowable range can be set by the user, and is stored in advance in, for example, a nonvolatile memory that constitutes memory 22.

[0073] The acceleration of the vibrator 3A at the lowest resonance frequency F1(0) [Hz] is A1 （０） [m / sec ２ ], the acceleration of the vibrator 3A at the lowest resonance frequency F1(0)-3 [Hz] is A1 （０）－３ [m / sec ２ ], the acceleration of the vibrator 3A at the lowest resonance frequency F1(0)+3 [Hz] is A1 （０）＋３ [m / sec ２ ], it is preferable that the DSP 21 sets a target voltage that satisfies the formula (2).

[0074]

[0075] In addition, in equation (2), the value on the right side, that is, the difference in acceleration shown on the left side, is 5 [m / sec ２ ] or less is preferable, and 3 [m / sec ２] or less is more preferable. Furthermore, the difference between the target voltage of the DSP 21 when the vibration frequency of the vibrator 3A is the lowest resonance frequency F1(0) [Hz] and the target voltage of the DSP 21 when the vibration frequency of the vibrator 3A is the lowest resonance frequency F1(0) - 3 [Hz] or the lowest resonance frequency F1(0) + 3 [Hz] is preferably 20 [V] or less, more preferably 10 [V] or less, more preferably 5 [V] or less, even more preferably 3 [V] or less, and particularly preferably 1 [V] or less. Furthermore, the difference between the target voltage of the DSP 21 when the vibration frequency of the vibrator 3A is the lowest resonance frequency F1(0) + 3 [Hz] and the target voltage of the DSP 21 when the vibrator 3A is the lowest resonance frequency F1(0) - 3 [Hz] is preferably 20 [V] or less, more preferably 10 [V] or less, more preferably 5 [V] or less, even more preferably 3 [V] or less, and particularly preferably 1 [V] or less.

[0076] Also, the acceleration of the vibrator 3B at the lowest resonance frequency F2 (0) [Hz] is A2 （０） [m / sec ２ ], the acceleration of the vibrator 3B at the lowest resonance frequency F2(0)-3 [Hz] is A2 （０）－３ [m / sec ２ ], the acceleration of the vibrator 3B at the lowest resonance frequency F2(0)+3[Hz] is A2 （０）＋３ [m / sec ２ ], it is preferable that the DSP 21 sets a target voltage that satisfies the formula (3).

[0077]

[0078] In addition, in equation (3), the value on the right side, that is, the difference in acceleration shown on the left side, is 5 [m / sec ２ ] or less is preferable, and 3 [m / sec ２] or less is more preferable. Furthermore, the difference between the target voltage of the DSP 21 when the vibrator 3B has the lowest resonance frequency F1(0) [Hz] and the target voltage of the DSP 21 when the vibrator 3B has the lowest resonance frequency F1(0) - 3 [Hz] or the lowest resonance frequency F1(0) + 3 [Hz] is preferably 20 [V] or less, more preferably 10 [V] or less, more preferably 5 [V] or less, even more preferably 3 [V] or less, and particularly preferably 1 [V] or less. Furthermore, the difference between the target voltage of the DSP 21 when the vibrator 3B has the lowest resonance frequency F1(0) + 3 [Hz] and the target voltage of the DSP 21 when the vibrator 3B has the lowest resonance frequency F1(0) - 3 [Hz] is preferably 20 [V] or less, more preferably 10 [V] or less, more preferably 5 [V] or less, even more preferably 3 [V] or less, and particularly preferably 1 [V] or less.

[0079] In step S30, the DSP 21 controls the input voltage of each vibrator 3 so that the input voltage of each vibrator 3 becomes the target voltage calculated in step S20, and ends the vibrator-equipped glass vibrating plate control process shown in Figure 9.

[0080] There are two types of sharing ratios for each vibrator 3: a sharing ratio that is set in advance (referred to as a "default sharing ratio"), and a sharing ratio that is calculated sequentially (referred to as a "sequential sharing ratio").

[0081] For example, when active noise cancellation is performed using the glass diaphragm 1 with a vibrator for a sound, such as music, whose power spectrum, which indicates the change in sound pressure level for each frequency band over time, is known in advance, an inverted power spectrum can be obtained from the power spectrum. The sound represented by the inverted power spectrum becomes a canceling sound having a frequency distribution in opposite phase to the sound represented by the power spectrum. Therefore, a predetermined allocation ratio for the vibrator 3 can be created in advance for each sound based on the inverted power spectrum.

[0082] For example, if the created specified sharing ratio is stored in advance in the memory 22 for each sound, the DSP 21 can read out the specified sharing ratio corresponding to a specific sound from the memory 22, for example, when a specific sound is selected by the user or when a specific sound starts to be played, and set the sharing voltage in accordance with the read sharing ratio.

[0083] Specifically, for example, when the control device 20 is connected by wire or wirelessly to a music playback device such as a smartphone, a music player, or a car navigation system, the DSP 21 acquires information about the title and performer of the song that the user is playing. The DSP 21 identifies the song from the acquired information about the song title and performer, reads from the memory 22 the specified sharing ratio corresponding to the identified song, and sets the shared voltage according to the read sharing ratio.

[0084] Furthermore, for example, when a song is being played on the radio, the radio personality may speak the song title and information about the performer before playing the song. Therefore, the DSP 21 may use known voice recognition technology to acquire information about the song title and performer of the song that is about to be played and identify the song from the acquired information. If the radio personality does not speak the song title and information about the performer before playing the song, the DSP 21 may identify the song from the melody of the song being played. In this case, the DSP 21 may itself perform a process to identify the song from its melody, or the song may be identified using a website that provides a service for identifying songs from their melodies.

[0085] On the other hand, when active noise cancellation of a sound whose power spectrum and the location of the sound source cannot be specified in advance, such as noise in a vehicle driving area, is performed using a glass diaphragm with vibrator 1, it is not possible to obtain an inverted power spectrum in advance, and therefore it is not possible to create a predetermined sharing ratio for the vibrator 3 in advance.

[0086] Therefore, in such a case, the DSP 21 collects sound with a microphone, sequentially generates inverted power spectra from the audio data of the collected sound, and sequentially calculates the sharing ratio of the vibrator 3 based on the generated inverted power spectra, thereby sequentially creating the sharing ratio.

[0087] In the above, the vibrator-equipped glass diaphragm control process has been described using an example in which vibrations in the vicinity of the lowest resonance frequency F1(0) are generated in the vibrator 3, but the same process can be performed when vibrations of a frequency in the vicinity of the lowest resonance frequency F2(0) are generated in the vibrator 3. In this case, in step S20, the DSP 21 can increase the shared voltage of vibrator 3A so as to compensate for the decrease in the shared voltage of vibrator 3B, instead of decreasing the shared voltage of vibrator 3B below that of vibrator 3A.

[0088] 9, the response time of the vibration generated by the vibrators 3A and 3B near the lowest resonance frequency F(0) is suppressed to 0.1 [sec] or less. Furthermore, the response time of the vibration generated by the vibrators 3A and 3B near the lowest resonance frequency F(0) is preferably 0.05 [sec] or less, more preferably 0.01 [sec] or less, even more preferably 0.005 [sec] or less, and particularly preferably 0.003 [sec] or less.

[0089] Although FIG. 1 shows an example in which the vibrators 3A and 3B are attached to one end of the glass plate structure 9 in the region A1 along the direction of travel of the vehicle, there is no limitation on the attachment position of the vibrators 3 in the region A1.

[0090] For example, as shown in FIG. 10A, a vibrator 3A and a vibrator 3B may be attached to both ends of a region A1 of a glass plate structure 9 along the traveling direction of the vehicle.

[0091] Furthermore, a plurality of vibrators 3 having the same minimum resonance frequency F(0) may be attached to the glass plate construct 9. Fig. 10B is a diagram showing an example in which a pair of vibrators 3A and 3B is attached to both ends of the region A1 of the glass plate construct 9 along the traveling direction of the vehicle. In this case, in step S30 of Fig. 9, the DSP 21 controls the input voltage of each vibrator 3A so that the input voltage of each vibrator 3A becomes the target voltage calculated in step S20. Furthermore, the DSP 21 controls the input voltage of each vibrator 3B so that the input voltage of each vibrator 3B becomes the target voltage calculated in step S20.

[0092] Furthermore, the number of vibrators 3 having the same minimum resonance frequency F(0) among the vibrators 3 attached to the glass plate structure 9 does not necessarily have to be the same. For example, Fig. 10C is a diagram showing an example of attachment to the glass plate structure 9 when the number of vibrators 3B is less than the number of vibrators 3A. As shown in Fig. 10C, the number of vibrators 3 in a set of vibrators 3 having the same minimum resonance frequency F(0), i.e., a vibrator group having the same minimum resonance frequency F(0), may differ for each vibrator group.

[0093] Furthermore, although the above describes an example in which two types of vibrators 3, vibrator 3A and vibrator 3B, having different minimum resonance frequencies F(0), are attached to the glass plate construct 9, three or more types of vibrators 3 having different minimum resonance frequencies F(0) may be attached to the glass plate construct 9. FIG. 10D is a diagram showing an example in which three types of vibrators 3A, vibrator 3B, and vibrator 3C having different minimum resonance frequencies F(0) are attached to the glass plate construct 9. When the DSP 21 causes the vibrators 3 to generate vibrations at a frequency near any of the minimum resonance frequencies F(0), the DSP 21 reduces the shared voltage of the vibrator 3 having the target minimum resonance frequency F(0) below the shared voltages of the other vibrators 3. Instead, the DSP 21 performs control to increase the shared voltages of the other vibrators 3 so as to compensate for the decrease in the shared voltage of the vibrator having the target minimum resonance frequency F(0).

[0094] As shown in Fig. 2, when the vibrator 3 is attached to the glass plate construct 9, it is attached to the glass plate construct 9 via a mount 7 provided on one main surface of the glass plate construct 9, but a plurality of vibrators 3 may be attached to one mount 7. Fig. 11 is a diagram showing an example in which two vibrators 3 are fixed to one mount 7 at a distance from each other. A dedicated mount 7 for attaching the vibrator 3 to the glass plate construct 9 may be provided, but if a structure that can be used as the mount 7 is already provided on the glass plate construct 9, that structure may be used as the mount 7.

[0095] FIG. 12 is a diagram showing an example of using a structure attached to a glass plate construct 9 as the mount 7. In the example shown in FIG. 12, a structure (holder) previously attached to the glass plate construct 9 is used as the mount 7 to slide the glass plate construct 9 in response to a user's switch operation. The mount 7 in FIG. 12 is U-shaped, and the glass plate construct 9 is sandwiched in the U-shaped gap to support the glass plate construct 9 from below. A support member (not shown) that moves up and down by rotation of a motor linked to switch operation is attached below the mount 7 in FIG. 12. When the support member moves up, the entire glass plate construct 9 moves up, and the glass plate construct 9 fully closes the opening area of ​​the vehicle. When the support member moves down, the entire glass plate construct 9 moves below the belt line BL, and the opening area of ​​the vehicle fully opens. The vibrator 3 is attached to the mount 7 that utilizes a structure used for sliding the glass plate construct 9 in this way. In this case, a new mount 7 for attaching the vibrator 3 to the glass plate structure 9 may become unnecessary.

[0096] In the above, the vibrator-equipped glass vibration plate 1 has been explained using the example of a case where the vibrator 3 is attached to the side glass of a vehicle, but as shown in Figure 13, the vibrator-equipped glass vibration plate 1 may also be applied to at least one of the roof glass RG and the back door glass RW of a vehicle.

[0097] 14A to 14C are diagrams showing examples of attaching the vibrator 3 to the roof glass RG.

[0098] 14A shows an example in which a vibrator 3A is attached near one of the opposing sides of the roof glass RG, and a vibrator 3B is attached near the other side. Fig. 14B shows an example in which one vibrator 3A is attached to each of two of the four corners of the roof glass RG, and one vibrator 3B is attached to each of the remaining two corners. Note that there are no restrictions on the attachment positions of the vibrators 3, such as which two of the four corners of the roof glass RG the vibrators 3A are attached to and which two corners the vibrators 3B are attached to.

[0099] FIG. 14C shows an example in which a pair of vibrators, each consisting of a vibrator 3A and a vibrator 3B, is attached to each of the four corners of the roof glass RG.

[0100] The number of vibrators 3A and vibrators 3B attached to the roof glass RG does not necessarily have to be the same; for example, vibrators 3A or vibrators 3B may be added near the center of the roof glass RG where the two diagonal lines of the roof glass RG shown in Figure 14B intersect.

[0101] On the other hand, FIGS. 15A to 15F are diagrams showing examples of attaching the vibrator 3 to the back door glass RW.

[0102] Of these, FIG. 15A shows an example in which one vibrator 3A and one vibrator 3B are attached along one side of the back door glass RW.

[0103] FIG. 15B shows an example in which a vibrator 3A is attached near one of the opposing sides of the back door glass RW, and a vibrator 3B is attached near the other side.

[0104] 15C shows an example in which one vibrator 3A is attached to each of two of the four corners of the back door glass RW, and one vibrator 3B is attached to each of the remaining two corners. As in the case of the roof glass RG, there are no restrictions on the attachment positions of the vibrators 3, such as which two corners of the back door glass RW the vibrators 3A are attached to and which two corners the vibrators 3B are attached to.

[0105] FIG. 15D shows an example in which two pairs of vibrators, each consisting of a vibrator 3A and a vibrator 3B, are attached along one side of the back door glass RW.

[0106] FIG. 15E shows an example in which a pair of vibrators are attached near each of the opposing sides of the back door glass RW, and a vibrator 3A is attached near one of the remaining sides.

[0107] 15F shows an example in which the vibrator 3A attached near the remaining side in FIG. 15E is replaced with a vibrator 3C. In this way, three or more types of vibrators 3 each having a different minimum resonance frequency F(0) may be attached to the roof glass RG and the back door glass RW.

[0108] In this way, the number of vibrators 3 each having a minimum resonance frequency F(0) to be attached to and at which positions on the glass used in which part of the vehicle, including the side glass, roof glass RG, and back door glass RW, is determined in consideration of, for example, the vibration characteristics of the glass plate structure 9, the frequency characteristics of the vibrators 3, and the acoustic characteristics inside the vehicle.

[0109] Furthermore, although we have explained examples of applying the vibrator-equipped glass vibration plate 1 to vehicles, the vibrator-equipped glass vibration plate 1 may also be applied to glass used in moving objects such as trains, drones, airplanes, and ships, as well as architectural window glass.

[0110] The vibrator-equipped glass diaphragm 1 may also be applied to partitions that separate people. Specifically, the vibrator-equipped glass diaphragm 1 may be applied to ticket sales booths in theaters, zoos, art museums, amusement parks, etc., bank teller counters, train station teller counters, and convenience store cash registers. The vibrator-equipped glass diaphragm 1 may also be applied to partitions that separate individual seats in first class on an airplane, etc.

[0111] Furthermore, the glass vibration plate 1 with a vibrator may be applied to the glass part of the housing of a machine or device in order to attenuate sound emitted from inside the machine or device, or to emit sound from the machine or device.

[0112] In addition, in order to attenuate sound that penetrates from the space outside a glass sound barrier (soundproof wall) installed on the side of a road to the space inside, the glass vibration plate 1 with a vibrator may be applied to the glass part of the sound barrier (soundproof wall).

[0113] While one aspect of the vibrator-equipped glass diaphragm control system 10 has been described above using an embodiment, the disclosed form of the vibrator-equipped glass diaphragm control system 10 is merely an example, and the form of the vibrator-equipped glass diaphragm control system 10 is not limited to the scope described in the embodiment. Various modifications or improvements can be made to the embodiment without departing from the gist of the present disclosure, and forms incorporating such modifications or improvements are also included in the technical scope of the disclosure. For example, additional processing may be added to the vibrator-equipped glass diaphragm control processing shown in FIG. 9 without departing from the gist of the present disclosure.

[0114] In the above embodiment, as an example, the vibrator-equipped glass diaphragm control process shown in Fig. 9 is implemented by software. However, the same process as the flowchart of the vibrator-equipped glass diaphragm control process may be implemented by hardware. In this case, the processing speed can be increased compared to when the vibrator-equipped glass diaphragm control process is implemented by software.

[0115] In the above embodiment, the term "processor" refers to a processor in a broad sense, and includes, for example, the DSP 21 and dedicated processors. Dedicated processors include, for example, a GPU (Graphics Processing Unit), an ASIC (Application Specific Integrated Circuit), an FPGA (Field Programmable Gate Array), and a programmable logic device.

[0116] Furthermore, the operations of the processors in the above embodiments may not only be performed by a single processor, but may also be performed by a plurality of processors located at physically separate locations working together.

[0117] In the above embodiment, an example has been described in which the vibrator-equipped glass diaphragm control program is stored in a nonvolatile memory constituting the memory 22. However, the storage destination of the vibrator-equipped glass diaphragm control program is not limited to a nonvolatile memory. The vibrator-equipped glass diaphragm control program of the present disclosure can also be provided in a form recorded on a computer-readable storage medium. For example, the vibrator-equipped glass diaphragm control program may be provided in a form recorded on an optical disc such as a CD-ROM (Compact Disk Read Only Memory), a DVD-ROM (Digital Versatile Disk Read Only Memory), or a Blu-ray disc. The vibrator-equipped glass diaphragm control program may also be provided in a form recorded on a portable semiconductor memory such as a USB (Universal Serial Bus) memory or a memory card. Non-volatile memory, CD-ROM, DVD-ROM, Blu-ray disc, USB, and memory card are examples of non-transitory storage media.

[0118] Furthermore, the control device 20 may download a control program for the glass vibrating plate with vibrator from an external device connected to the Internet via a communication unit (not shown) and store it in non-volatile memory.

[0119] As described above, the present specification discloses the following:

[0120] (1) A glass diaphragm with a vibrator, comprising: a glass plate structure; and a first vibrator and a second vibrator attached to the glass plate structure, wherein, when the minimum resonance frequency of the first vibrator is F1(0) [Hz] and the minimum resonance frequency of the second vibrator is F2(0) [Hz], the following relationship is satisfied: 3 ≦ |F1(0)-F2(0)| ≦ 100 [Hz]. With this glass diaphragm with a vibrator, vibrations of a frequency corresponding to the minimum resonance frequency of one vibrator can be generated by the other vibrator, thereby achieving acoustic properties over a wide range of sounds with good reproducibility of the sound range near the minimum resonance frequency specific to the vibrator.

[0121] (2) The glass diaphragm with a vibrator according to (1), wherein the minimum resonance frequency F1(0) of the first vibrator and the minimum resonance frequency F2(0) of the second vibrator are each 200 Hz or less. With this glass diaphragm with a vibrator, by using a vibrator with a minimum resonance frequency of 200 Hz or less, it is possible to generate sounds in the lowest possible bass range compared to when the minimum resonance frequency exceeds 200 Hz.

[0122] (3) The glass diaphragm with a vibrator according to (1) or (2), wherein the first vibrator and the second vibrator are fixed to one of the main surfaces of the glass plate structure at a distance from each other via a single mount portion. With this glass diaphragm with a vibrator, since multiple vibrators are fixed to the same mount portion, the number of mount portions can be reduced compared to when a mount portion is provided for each vibrator.

[0123] (4) The glass diaphragm with a vibrator according to any one of (1) to (3), wherein the glass plate structure is a window glass for a vehicle. This glass diaphragm with a vibrator can suppress noise entering the vehicle interior through the window glass.

[0124] (5) The glass diaphragm with a vibrator according to any one of (1) to (3), wherein the glass plate structure is glass used for at least one of a moving body, a building, a partition separating people, a housing for an apparatus, and a soundproof wall. This glass diaphragm with a vibrator can be applied to any object in which glass is used.

[0125] (6) A glass vibrating plate with a vibrator, comprising a glass plate structure, a first vibrator and a second vibrator attached to the glass plate structure, and satisfying 3≦|F1(0)−F2(0)|≦100[Hz], where the lowest resonance frequency of the first vibrator is F1(0) [Hz] and the lowest resonance frequency of the second vibrator is F2(0) [Hz]; and an input voltage of the first vibrator required to generate vibrations of a frequency near the lowest resonance frequency F1(0) of the first vibrator by the first vibrator is lower than an input voltage of the second vibrator required to generate vibrations of a frequency near the lowest resonance frequency F1(0) of the first vibrator by the second vibrator, while increasing the input voltage of the second vibrator corresponding to near the lowest resonance frequency F1(0) of the first vibrator so as to compensate for the decrease in vibrations of frequencies near the lowest resonance frequency F1(0) of the first vibrator that were intended to be generated by the first vibrator, a control device that controls the input voltages of the first and second vibrators so as to lower the input voltage of the second vibrator corresponding to the vicinity of the lowest resonant frequency F2(0) of the second vibrator, which is required for the second vibrator to generate vibrations of a frequency near the lowest resonant frequency F2(0) of the second vibrator, compared to the input voltage of the first vibrator corresponding to the vicinity of the lowest resonant frequency F2(0) of the second vibrator, which is required for the first vibrator to generate vibrations of a frequency near the lowest resonant frequency F2(0) of the second vibrator, while increasing the input voltage of the first vibrator corresponding to the vicinity of the lowest resonant frequency F2(0) of the second vibrator, so as to compensate for the decrease in vibrations of a frequency near the lowest resonant frequency F2(0) of the second vibrator that was intended to be generated by the second vibrator.With this glass diaphragm control system, vibrations of a frequency corresponding to the lowest resonant frequency of one vibrator can be generated by the other vibrator, thereby achieving acoustic properties over a wide range of sound with good reproducibility of the sound range near the lowest resonant frequency specific to the vibrator.

[0126] (7) The glass diaphragm control system with a vibrator according to (6), wherein the minimum resonance frequency F1(0) of the first vibrator and the minimum resonance frequency F2(0) of the second vibrator are each 200 Hz or less. According to this glass diaphragm control system, by using a vibrator with a minimum resonance frequency of 200 Hz or less, it is possible to generate a sound in the lowest possible low-frequency range compared to a case where the minimum resonance frequency exceeds 200 Hz.

[0127] (8) The glass diaphragm control system with a vibrator according to (6) or (7), wherein the lowest resonant frequency F1(0) of the first vibrator and the lowest resonant frequency F2(0) of the second vibrator are each included in a predetermined frequency band of 20 Hz to 200 Hz, and the control device controls the input voltages of the first vibrator and the second vibrator so that the difference in the fluctuations of the input voltages of the first vibrator and the second vibrator from the respective allocated voltages predetermined for the input voltages of the first vibrator and the second vibrator is within a predetermined range in which the fluctuations of the first vibrator and the second vibrator can be considered to be the same magnitude. This glass diaphragm control system can generate sounds in the lowest possible bass range compared to a case in which a vibrator with a lowest resonant frequency exceeding 200 Hz is used. Furthermore, this glass diaphragm control system can complement vibrations of one vibrator at the lowest resonant frequency with vibrations of the other vibrator.

[0128] (9) The glass diaphragm control system with a vibrator according to (8), wherein the control device inputs a voltage in the range of 0.01 V to 100 V to the first vibrator and the second vibrator. According to this glass diaphragm control system, the voltage input to each vibrator can be limited to within a predetermined range.

[0129] (10) In a state where an input voltage is applied to the first vibrator and the second vibrator, in the first vibrator, a difference between a target voltage of the control device when the vibration frequency of the first vibrator is the lowest resonance frequency F1(0) and a target voltage of the control device when the vibration frequency of the first vibrator is the lowest resonance frequency F1(0)-3[Hz] is 20[V] or less, and a difference between a target voltage of the control device when the vibration frequency of the first vibrator is the lowest resonance frequency F1(0) and a target voltage of the control device when the vibration frequency of the first vibrator is the lowest resonance frequency F1(0)+3[Hz] is 20[V] or less, Alternatively, in the second vibrator, a difference between the target voltage of the control device when the vibration frequency of the second vibrator is the lowest resonance frequency F2(0) and the target voltage of the control device when the vibration frequency of the second vibrator is the lowest resonance frequency F2(0) - 3 [Hz] is 20 [V] or less, and a difference between the target voltage of the control device when the vibration frequency of the second vibrator is the lowest resonance frequency F2(0) and the target voltage of the control device when the vibration frequency of the second vibrator is the lowest resonance frequency F2(0) + 3 [Hz] is 20 [V] or less. With this glass diaphragm control system, better sound can be reproduced near the lowest resonance frequency compared to a case where no limit is imposed on the difference from the target voltage at each vibration frequency.

[0130] (11) The glass diaphragm control system with a vibrator according to any one of (6) to (10), wherein the control device controls the input voltages of the first vibrator and the second vibrator so that the response time of the vibrations generated by the first vibrator and the second vibrator is 0.1 [sec] or less in a frequency band near the lowest resonance frequency F1(0) of the first vibrator and near the lowest resonance frequency F2(0) of the second vibrator. This glass diaphragm control system can suppress a decrease in sound reproducibility due to a delay in the response time of the vibrator.

[0131] (12) A vibrator attached to a glass plate structure constituting a glass vibrating plate with a vibrator, wherein, when the respective minimum resonance frequencies are F1(0) [Hz] and F2(0) [Hz], for a first vibrator and a second vibrator that satisfy 3≦|F1(0)−F2(0)|≦100 [Hz], an input voltage of the first vibrator required for the first vibrator to generate vibrations of a frequency in the vicinity of the minimum resonance frequency F1(0) of the first vibrator is lowered than an input voltage of the second vibrator required for the second vibrator to generate vibrations of a frequency in the vicinity of the minimum resonance frequency F1(0) of the first vibrator, while increasing the input voltage of the second vibrator corresponding to the vicinity of the minimum resonance frequency F1(0) of the first vibrator so as to compensate for the decrease in the vibrations of the frequency in the vicinity of the minimum resonance frequency F1(0) of the first vibrator that was intended to be generated by the first vibrator, a control program for a glass diaphragm with a vibrator that causes a computer to execute a process of controlling the input voltages of the first and second vibrators so as to lower an input voltage of the second vibrator corresponding to a frequency near the lowest resonant frequency F2(0) of the second vibrator that is required for the second vibrator to generate vibrations of a frequency near the lowest resonant frequency F2(0) of the second vibrator than an input voltage of the first vibrator corresponding to a frequency near the lowest resonant frequency F2(0) of the second vibrator that is required for the first vibrator to generate vibrations of a frequency near the lowest resonant frequency F2(0) of the second vibrator, while increasing the input voltage of the first vibrator corresponding to a frequency near the lowest resonant frequency F2(0) of the second vibrator so as to compensate for the decrease in the input voltage of the second vibrator. According to this glass diaphragm control program, vibrations of a frequency corresponding to the lowest resonant frequency of one vibrator can be generated by the other vibrator. Therefore, according to this glass diaphragm control program, it is possible to realize a glass diaphragm with a vibrator that has good reproducibility in the range of sounds near the lowest resonance frequency specific to the vibrator and has acoustic properties over a wide range of sounds.

[0132] (13) A vibrator-equipped glass diaphragm control program according to (12), which causes the computer to execute a process of controlling the input voltages of the first vibrator and the second vibrator, each of which has a minimum resonance frequency F1(0) and a minimum resonance frequency F2(0) of 200 Hz or less. This glass diaphragm control program causes the control device to control the input voltage of the vibrator whose minimum resonance frequency is 200 Hz or less. Therefore, this glass diaphragm control program can generate sounds in the lowest possible bass range, compared to when the control device controls the input voltage of a vibrator whose minimum resonance frequency exceeds 200 Hz.

[0133] (14) A vibrator-equipped glass diaphragm control program according to (12) or (13), which causes a computer to execute a process of controlling the input voltages of the first and second vibrators, each of which has a lowest resonance frequency F1(0) and a lowest resonance frequency F2(0) within a predetermined frequency band of 20 Hz to 200 Hz, so that the difference in the fluctuations of the input voltages of the first and second vibrators from the respective allocated voltages determined in advance as the input voltages of the first and second vibrators falls within a predetermined range in which the fluctuations of the first and second vibrators can be considered to be the same magnitude, in order to generate accelerations of magnitudes corresponding to the respective frequencies in the predetermined frequency band. This glass diaphragm control program can generate sounds in the lowest possible bass range, compared to controlling the input voltage of a vibrator whose lowest resonance frequency is 200 Hz. Furthermore, this glass diaphragm control program can complement vibrations of one vibrator at a frequency corresponding to the lowest resonance frequency with vibrations of the other vibrator.

[0134] (15) A control program for a glass diaphragm with a vibrator according to (14), for causing the computer to execute a process of controlling the range of the input voltage of each of the first vibrator and the second vibrator to be 0.01 V or more and 100 V or less. According to this glass diaphragm control program, the voltage input to each vibrator can be limited to a predetermined range.

[0135] (16) In a state where an input voltage is applied to the first vibrator and the second vibrator by a control device, in the first vibrator, a difference between a target voltage of the control device when the vibration frequency of the first vibrator is the lowest resonance frequency F1(0) and a target voltage of the control device when the vibration frequency of the first vibrator is the lowest resonance frequency F1(0)-3[Hz] is 20[V] or less, and a difference between a target voltage of the control device when the vibration frequency of the first vibrator is the lowest resonance frequency F1(0) and a target voltage of the control device when the vibration frequency of the first vibrator is the lowest resonance frequency F1(0)+3[Hz] is 20[V] or less, Alternatively, the vibrator-equipped glass diaphragm control program according to any one of (12) to (15) is configured to cause the computer to execute a process of generating a voltage such that, in the second vibrator, a difference between a target voltage of the control device when the vibration frequency of the second vibrator is the lowest resonance frequency F2(0) and a target voltage of the control device when the vibration frequency of the second vibrator is the lowest resonance frequency F2(0) - 3 [Hz] is 20 [V] or less, and a difference between a target voltage of the control device when the vibration frequency of the second vibrator is the lowest resonance frequency F2(0) and a target voltage of the control device when the vibration frequency of the second vibrator is the lowest resonance frequency F2(0) + 3 [Hz] is 20 [V] or less. According to this glass diaphragm control program, better sound can be reproduced near the lowest resonance frequency compared to when no limit is imposed on the difference from the target voltage at each vibration frequency.

[0136] (17) A control program for a glass diaphragm with a vibrator according to any one of (12) to (16), for causing a computer to execute a process of controlling input voltages to the first vibrator and the second vibrator so that the response time of vibrations generated by the first vibrator and the second vibrator is 0.1 [sec] or less in a frequency band near the lowest resonance frequency F1(0) of the first vibrator and near the lowest resonance frequency F2(0) of the second vibrator. This glass diaphragm control program can suppress a decrease in sound reproducibility due to a delay in the response time of the vibrator.

[0137] The disclosure of Japanese Patent Application No. 2022-157157, filed on September 29, 2022, is incorporated herein by reference in its entirety. All documents, patent applications, and technical standards described herein are incorporated herein by reference to the same extent as if each individual document, patent application, and technical standard was specifically and individually indicated to be incorporated by reference.

Claims

1. A glass plate structure, and a first oscillator and a second oscillator attached to the glass plate structure, wherein when the lowest resonance frequency of the first oscillator is F1(0) [Hz], and the lowest resonance frequency of the second oscillator is F2(0) [Hz], 3 ≤ |F1(0) - F2(0)| ≤ 100 [Hz] is satisfied, a glass diaphragm with oscillators.

2. The lowest resonance frequency F1(0) of the first oscillator and the lowest resonance frequency F2(0) of the second oscillator are each 200 [Hz] or less, The glass diaphragm with oscillators according to Claim 1.

3. The first oscillator and the second oscillator are fixed to be separated from each other via one mounting portion provided on one main surface of the glass plate structure, The glass diaphragm with oscillators according to Claim 1 or Claim 2.

4. The glass plate structure is a vehicle window glass, The glass diaphragm with oscillators according to Claim 1 or Claim 2.

5. The glass plate structure is glass used for at least one of a moving body, a building, a partition separating people, a housing of a device, and a soundproof wall, The glass diaphragm with oscillators according to Claim 1 or Claim 2.

6. A glass plate structure, and a first oscillator and a second oscillator attached to the glass plate structure, wherein the lowest resonance frequency of the first oscillator is F1(0) [Hz], and the lowest resonance frequency of the second oscillator is F2(0) [Hz], 3 ≤ |F1(0) - F2(0)| ≤ 100 [Hz] A glass diaphragm with oscillators that satisfies, and while reducing the input voltage of the first oscillator required to generate vibrations at a frequency near the lowest resonance frequency F1(0) of the first oscillator by the first oscillator, compared to the input voltage of the second oscillator required to generate vibrations at a frequency near the lowest resonance frequency F1(0) of the first oscillator by the second oscillator, as the input voltage of the first oscillator decreases, the input voltage of the second oscillator corresponding to the vicinity of the lowest resonance frequency F1(0) of the first oscillator is increased so as to complement the decrease in the vibrations at the frequency near the lowest resonance frequency F1(0) of the first oscillator that was supposed to be generated by the first oscillator, The input voltage of the second vibrator corresponding to the vicinity of the lowest resonance frequency F2(0) of the second vibrator, which is required to generate vibrations at a frequency in the vicinity of the lowest resonance frequency F2(0) of the second vibrator by the second vibrator, is reduced from the input voltage of the first vibrator corresponding to the vicinity of the lowest resonance frequency F2(0) of the second vibrator, which is required to generate vibrations at a frequency in the vicinity of the lowest resonance frequency F2(0) of the second vibrator by the first vibrator. On the other hand, as the input voltage of the second vibrator decreases, the input voltage of the first vibrator corresponding to the vicinity of the lowest resonance frequency F2(0) of the second vibrator is increased so as to complement the decrease in the vibrations at the frequency in the vicinity of the lowest resonance frequency F2(0) of the second vibrator that was supposed to be generated by the second vibrator. A control device for controlling the input voltages of the first vibrator and the second vibrator respectively, A glass diaphragm control system with a vibrator including the same.

7. The lowest resonance frequency F1(0) of the first vibrator and the lowest resonance frequency F2(0) of the second vibrator are each 200 [Hz] or less. The glass diaphragm control system with a vibrator according to claim 6.

8. The lowest resonance frequency F1(0) of the first vibrator and the lowest resonance frequency F2(0) of the second vibrator are each included in a predetermined frequency band of 20 [Hz] or more and 200 [Hz] or less, The control device makes the difference between the variations of the input voltage of the first vibrator and the input voltage of the second vibrator from the shared voltages predetermined as the input voltages of the first vibrator and the second vibrator to generate accelerations of magnitudes corresponding to each frequency in the predetermined frequency band fall within a predetermined range in which the variation of the first vibrator and the variation of the second vibrator can be regarded as having the same magnitude, and controls the input voltages of the first vibrator and the second vibrator respectively. The glass diaphragm control system with a vibrator according to claim 6 or claim 7.

9. The control device inputs a voltage in the range of 0.01 [V] or more and 100 [V] or less to the first vibrator and the second vibrator. The glass diaphragm control system with a vibrator according to claim 8.

10. With an input voltage applied to the first vibrator and the second vibrator, In the first vibrator, the difference between the target voltage of the control device when the vibration frequency of the first vibrator is the lowest resonance frequency F1(0) and the target voltage of the control device when the vibration frequency of the first vibrator is the lowest resonance frequency F1(0) - 3 [Hz] is 20 [V] or less, and the difference between the target voltage of the control device when the vibration frequency of the first vibrator is the lowest resonance frequency F1(0) and the target voltage of the control device when the vibration frequency of the first vibrator is the lowest resonance frequency F1(0) + 3 [Hz] is 20 [V] or less, Or, in the second vibrator, the difference between the target voltage of the control device when the vibration frequency of the second vibrator is the lowest resonance frequency F2(0) and the target voltage of the control device when the vibration frequency of the second vibrator is the lowest resonance frequency F2(0) - 3 [Hz] is 20 [V] or less, and the difference between the target voltage of the control device when the vibration frequency of the second vibrator is the lowest resonance frequency F2(0) and the target voltage of the control device when the vibration frequency of the second vibrator is the lowest resonance frequency F2(0) + 3 [Hz] is 20 [V] or less. The glass diaphragm control system with a vibrator according to claim 6 or claim 7.

11. The control device controls the input voltages of the first vibrator and the second vibrator so that the response time of the vibration generated by the first vibrator and the second vibrator in the frequency band near the lowest resonance frequency F1(0) of the first vibrator and near the lowest resonance frequency F2(0) of the second vibrator is 0.1 [sec] or less. The glass diaphragm control system with a vibrator according to claim 6 or claim 7.

12. A vibrator attached to a glass plate structure constituting a glass diaphragm with a vibrator, when the respective lowest resonance frequencies are F1(0) [Hz] and F2(0) [Hz], 3 ≤ |F1(0) - F2(0)| ≤ 100 [Hz] For the first vibrator and the second vibrator that satisfy, While reducing the input voltage of the first vibrator required to generate vibrations at a frequency near the lowest resonance frequency F1(0) of the first vibrator by the first vibrator, and complementing the reduction in the vibrations at a frequency near the lowest resonance frequency F1(0) of the first vibrator that were supposed to be generated by the first vibrator as the input voltage of the first vibrator decreases, the input voltage of the second vibrator corresponding to the vicinity of the lowest resonance frequency F1(0) of the first vibrator is increased, and while reducing the input voltage of the second vibrator corresponding to the vicinity of the lowest resonance frequency F2(0) of the second vibrator, which is required to generate vibrations at a frequency near the lowest resonance frequency F2(0) of the second vibrator by the second vibrator, by the first vibrator, from the input voltage of the first vibrator corresponding to the vicinity of the lowest resonance frequency F2(0) of the second vibrator, which is required to generate vibrations at a frequency near the lowest resonance frequency F2(0) of the second vibrator by the first vibrator, and complementing the reduction in the vibrations at a frequency near the lowest resonance frequency F2(0) of the second vibrator that were supposed to be generated by the second vibrator as the input voltage of the second vibrator decreases, the input voltage of the first vibrator corresponding to the vicinity of the lowest resonance frequency F2(0) of the second vibrator is increased, for the purpose of causing a computer to execute a process of controlling the respective input voltages of the first vibrator and the second vibrator so as to Glass diaphragm control program with vibrators.

13. For causing the computer to execute a process of controlling the respective input voltages of the first vibrator and the second vibrator, where the lowest resonance frequencies F1(0) and F2(0) are each 200 [Hz] or less The glass diaphragm control program with vibrators according to claim 12.

14. For the first vibrator and the second vibrator, where the lowest resonance frequencies F1(0) and F2(0) are each included in a predetermined frequency band of 20 [Hz] or more and 200 [Hz] or less A process for causing a computer to execute control over the input voltages of the first oscillator and the second oscillator such that the difference between the fluctuations of the input voltage of the first oscillator and the input voltage of the second oscillator from the divided voltages predetermined as the input voltages of the first oscillator and the second oscillator for generating accelerations of magnitudes corresponding to the respective frequencies in the predetermined frequency band is within a predetermined range where the fluctuations of the first oscillator and the second oscillator can be regarded as having the same magnitude. The glass diaphragm control program with oscillators according to claim 12 or claim 13.

15. A process for causing the computer to execute control such that the ranges of the input voltages of the first oscillator and the second oscillator are from 0.01 [V] or more to 100 [V] or less. The glass diaphragm control program with oscillators according to claim 14.

16. With input voltages applied to the first oscillator and the second oscillator by a control device, In the first oscillator, the difference between the target voltage of the control device when the oscillation frequency of the first oscillator is the lowest resonance frequency F1(0) and the target voltage of the control device when the oscillation frequency of the first oscillator is the lowest resonance frequency F1(0) - 3 [Hz] is 20 [V] or less, and the difference between the target voltage of the control device when the oscillation frequency of the first oscillator is the lowest resonance frequency F1(0) and the target voltage of the control device when the oscillation frequency of the first oscillator is the lowest resonance frequency F1(0) + 3 [Hz] is 20 [V] or less. Or, in the second oscillator, the difference between the target voltage of the control device when the oscillation frequency of the second oscillator is the lowest resonance frequency F2(0) and the target voltage of the control device when the oscillation frequency of the second oscillator is the lowest resonance frequency F2(0) - 3 [Hz] is 20 [V] or less, and the difference between the target voltage of the control device when the oscillation frequency of the second oscillator is the lowest resonance frequency F2(0) and the target voltage of the control device when the oscillation frequency of the second oscillator is the lowest resonance frequency F2(0) + 3 [Hz] is 20 [V] or less, and a process for generating a voltage for causing the computer to execute the above. The glass diaphragm control program with oscillators according to claim 12 or claim 13.

17. For causing a computer to execute a process of controlling the input voltage of each of the first oscillator and the second oscillator so that the response time of vibrations generated by the first oscillator and the second oscillator in a frequency band near the lowest resonance frequency F1(0) of the first oscillator and near the lowest resonance frequency F2(0) of the second oscillator is 0.1 [sec] or less A glass diaphragm control program with an oscillator according to claim 12 or claim 13.