Speaker device

Abstract

To provide a speaker device for enabling high fidelity reproduction with a simple configuration.SOLUTION: A speaker device X includes: a speaker unit 1 for outputting a sonic wave based on an audio signal to be input to a connection terminal (j); a housing 2 where opening ends E1, E2 are arranged on one side and the other side; and a liquid container 3 for storing a predetermined liquid L. In the speaker unit 1, the one opening end E1 is clogged so as to allow the rear surface to be exposed to an internal space S of the housing 2. The other opening end E2 is inserted to the liquid container 3. A gap (g) communicating with an outside of the liquid container 3 is formed between an outer peripheral surface of the housing 2 and an inner peripheral surface of the liquid container 3. The liquid L exists in a route from the internal space S of the housing 2 to the outside via the other opening end E2.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present invention relates to a speaker device. [Background technology]

[0002] 2. Description of the Related Art Conventionally, speaker devices in which a speaker unit is housed in an enclosure have been widely used to reproduce music with high fidelity.

[0003] When sound is played from a speaker unit that is not housed in an enclosure, the out-of-phase sound that comes out from the back of the speaker unit, in the low-frequency range with a low vibration frequency, travels around to the front, interferes with and cancels out the positive phase sound coming from the front. As a result, the speaker unit produces poor sound reproduction that is biased toward high frequencies and lacks bass frequencies.

[0004] To date, various types of enclosures have been developed to control the anti-phase sound from the back of the speaker unit, and attempts have continued to achieve high-fidelity reproduction. There are two main types of speaker enclosures currently on the market: sealed and bass reflex.

[0005] The sealed type is a method of blocking out the anti-phase sound that comes from the back of the speaker unit by confining it in an acoustically sealed space. The bass reflex type involves forming a hollow tube called a bass reflex port in part of a sealed enclosure, and using Helmholtz resonance to emit out-of-phase sound from the back of the speaker unit from the bass reflex port in the same phase as the positive phase sound from the front.

[0006] In this way, the types of enclosures for speaker devices have been developed and improved with a primary focus on how to process the anti-phase sound coming from the rear of the speaker unit without compromising the quality of the reproduced sound.

[0007] For example, Patent Document 1 describes an invention for a speaker device that utilizes the difficulty of sound waves propagating in a reduced pressure space by reducing the air pressure inside the enclosure to about one-tenth of atmospheric pressure. By reducing the air pressure inside the enclosure and then sealing it, sound waves emitted inside the enclosure are reflected off the inner wall of the enclosure, return to the diaphragm, and interfere with each other, which in principle eliminates the cancellation and distorted vibrations that occur, and reproduces sound with sufficient sound pressure and clear sound quality across the entire audible range. [Prior art documents] [Patent documents]

[0008] [Patent Document 1] Patent Publication No. 2021-087187 Summary of the Invention [Problem to be solved by the invention]

[0009] However, the closed type and bass reflex type speaker devices have the following problems.

[0010] In other words, in a sealed type speaker, when the cone paper of the speaker unit contained in the enclosure vibrates toward the front, the air pressure inside the enclosure becomes low, and when the cone paper vibrates toward the rear, the air pressure inside the enclosure becomes high. As a result, fluctuations in air pressure inside the enclosure act like an air spring on the cone paper, preventing the cone paper from vibrating in accordance with the signal current. To some extent, this vibration problem can be solved by increasing the size of the enclosure, but increasing the size poses significant practical and cost constraints.

[0011] In addition, in a bass reflex type speaker, the direct reproduced sound emitted from the speaker unit is controlled by electromagnetic damping force to vibrate faithfully to the input waveform because the cone paper is directly connected to the voice coil, but this electromagnetic damping force does not apply to the sound emitted from the bass reflex port. As a result, although the low-frequency sound emitted from the bass reflex port has a high sound pressure level, it has poor transient characteristics and cannot be said to be a highly fidelity reproduction sound. In addition, in bass reflex types, sounds other than those near the resonance point emitted from the bass reflex port (sounds that are reflected in a complex manner within the enclosure) interfere with the positive phase sound from the front, impairing the sound quality.

[0012] As mentioned above, sealed speaker devices suffer from insufficient sound pressure in low-frequency reproduction and are too large, while bass-reflex speaker devices solve the problem of insufficient low-frequency reproduction of sealed devices to some extent, but still have problems such as deterioration of sound quality due to their unique structure.

[0013] The present invention has been made in view of the above-mentioned circumstances, and an object of the present invention is to provide a speaker device capable of high-fidelity reproduction with a simple configuration. [Means for solving the problem]

[0014] In order to solve the above problems, the present invention provides a device that includes a speaker unit that outputs sound waves based on an input audio signal, a housing having one and another open ends, and a liquid container that contains a predetermined liquid, the speaker unit has one open end closed so that a rear surface of the speaker unit is exposed to an internal space of the housing; The other open end is inserted into the liquid container, a gap is formed between an outer circumferential surface of the housing and an inner circumferential surface of the liquid container, the gap communicating with the outside of the liquid container; The liquid is present in a path extending from the internal space of the housing to the outside via the other open end.

[0015] According to the present invention, liquid is present in the path leading from the internal space of the housing to the gap via the other open end, and the air pressure in the internal space of the housing is connected to the external atmospheric pressure via the liquid. Furthermore, the vibration of the speaker unit (cone paper) changes the air pressure in the internal space of the housing. The change in air pressure in the internal space of the housing creates a pressure difference with the atmospheric pressure, and this pressure difference pushes up or down the liquid level in the housing. The liquid in the housing that is pushed up or down flows in and out between the liquid container, eliminating the pressure difference that has occurred in the internal space of the housing and making it equal to atmospheric pressure. This series of liquid movements suppresses the generation of air springs.

[0016] In other words, the vibration energy of the cone paper is replaced by potential energy of the liquid, thereby suppressing the air spring in the internal space of the housing, so that the vibration of the cone paper is not hindered. In addition, the vibration of the speaker unit's cone paper vibrates the liquid inside the housing, but since the acoustic impedance of liquid is significantly different from that of air, the phenomenon of acoustic energy inside the housing being transmitted to the outside of the housing via the fluid can be ignored. As a result, the sound reproduced from the speaker unit is not masked across the entire frequency range, from low to high tones, resulting in clear, detailed, and realistic sound quality with excellent reproduction capabilities for minute signals.

[0017] In addition, according to the present invention, as described above, the generation of air spring is suppressed, so that a large volume is not required, and the entire housing can be made smaller.

[0018] In a preferred embodiment of the present invention, the other open end is immersed in the liquid, and the liquid is exposed to the outside air through the gap.

[0019] With this configuration, the sound emitted from the back of the cone paper is transmitted directly to the liquid, which enhances the effect of suppressing the generation of air springs, resulting in reproduced sound with a more realistic sound quality.

[0020] In a preferred form of the invention, the liquid is non-volatile.

[0021] With this configuration, the liquid can be used for a long period of time.

[0022] In a preferred embodiment of the present invention, the gap is provided with a filter member having air permeability.

[0023] This configuration can prevent impurities from being mixed into the liquid.

[0024] In a preferred embodiment of the present invention, the liquid container has an on-off valve for discharging the liquid.

[0025] With such a configuration, the speaker device can be easily moved and transported after the liquid has been drained.

[0026] In a preferred embodiment of the present invention, the housing has a first housing having the one opening end and a second housing having the other opening end, and the first housing and the second housing are detachably connected to each other.

[0027] With such a configuration, it becomes possible to handle the first housing and the second housing separately, improving convenience during relocation, transportation, storage, and the like.

[0028] In a preferred form of the present invention, the liquid is sealed in a flexible bag so that a predetermined space is formed inside the bag, and the other open end is closed by being placed on the bag.

[0029] With this configuration, it is possible to prevent leakage of the liquid while enabling reproduction of realistic sound quality by using liquid. Effect of the Invention

[0030] According to the present invention, it is possible to provide a speaker device capable of high-fidelity reproduction with a simple configuration. [Brief description of the drawings]

[0031] [Figure 1] 1 is a perspective view showing a speaker device according to a first embodiment of the present invention. [Diagram 2] 1 is a cross-sectional view taken along the line PP of the speaker device according to the first embodiment of the present invention. [Diagram 3] FIG. 2 is an explanatory diagram of an operation mode of the speaker device according to the first embodiment of the present invention. [Figure 4] FIG. 2 is an explanatory diagram of a usage mode of the speaker device according to the first embodiment of the present invention. [Diagram 5] FIG. 11 is a perspective view showing a speaker device according to a second embodiment of the present invention. [Figure 6] 1A and 1B are diagrams showing a speaker device according to a second embodiment of the present invention, in which (a) is a cross-sectional view taken along line QQ and (b) is a cross-sectional view taken along line RR. [Figure 7] 10 is an explanatory diagram of an operation mode of the speaker device according to the second embodiment of the present invention. FIG. [Figure 8] FIG. 11 is an explanatory diagram of a usage mode of the speaker device according to the second embodiment of the present invention. [Figure 9] FIG. 11 is a perspective view of a speaker device according to a third embodiment of the present invention. [Figure 10] 11 is a cross-sectional view taken along the line SS of a speaker device according to a third embodiment of the present invention. FIG. [Figure 11] FIG. 11 is an explanatory diagram of a usage mode of the speaker device according to the third embodiment of the present invention. [Figure 12] 10A to 10C are diagrams illustrating modified examples of the speaker devices according to the first and second embodiments of the present invention. [Figure 13] 10A to 10C are diagrams illustrating modified examples of the speaker devices according to the first and second embodiments of the present invention. [Figure 14] 10A to 10C are diagrams illustrating modified examples of the speaker devices according to the first and second embodiments of the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0032] <Embodiment 1> Hereinafter, the speaker device according to the first embodiment of the present invention will be described with reference to FIGS. It should be noted that the embodiment described below is merely an example of the present invention, and the present invention is not limited to the embodiment described below. In these figures, the symbol X indicates the speaker device according to the present embodiment. It should be noted that the embodiments described below are merely examples of the present invention, and the present invention is not limited to the following embodiments.

[0033] As shown in Figures 1 and 2, the speaker device X includes a speaker unit 1 that outputs sound waves based on an input audio signal, a housing 2 having opening ends E1 and E2 on one side (upper) and the other side (lower), and a liquid container 3 that contains a predetermined liquid L.

[0034] Liquid L is preferably a non-volatile, chemically stable oil or the like. In particular, for example, commercially available olive oil is preferably used when used at room temperature, and engine lubricating oil is preferably used when used in sub-zero environments.

[0035] In the speaker unit 1 of this embodiment, the open end E1 is closed so that the rear surface thereof is exposed to the internal space S of the housing 2. Moreover, the connection terminal j of the speaker unit 1 protrudes from the side surface of the housing 2.

[0036] The speaker unit 1 is, for example, a dynamic speaker unit.

[0037] The housing 2 in this embodiment is a substantially cylindrical body. Further, a plurality of spacers m are provided on the bottom surface of the housing 2 to keep the bottom surface of the housing 2 and the bottom surface of the liquid container 3 apart by a predetermined distance. The spacer m may be attached to the housing 2 or the liquid container 3 in advance, or may be configured separately from these.

[0038] The liquid container 3 in this embodiment is a generally cylindrical body with a bottom that opens upward, into which a fixed amount of liquid L is poured.

[0039] Here, as shown particularly in FIG. 2, the open end E2 is immersed in the liquid L. More specifically, the lower part of the housing 2 including the open end E2 is immersed in the liquid L, so that the liquid L enters the internal space S through the open end E2.

[0040] Furthermore, a gap g is formed around the entire periphery between the outer circumferential surface of housing 2 and the inner circumferential surface of liquid container 3, and a breathable filter member f is provided in this gap g. More specifically, the filter member f is a substantially annular member formed of, for example, a sponge or the like, and is provided so as to be packed into the gap g while maintaining breathability.

[0041] By configuring the speaker device X as described above, the liquid L is present in the path R that runs from the internal space S through the opening end E2 to the gap g.

[0042] Hereinafter, a usage mode of the speaker device X will be described with reference to FIG. 3 and FIG.

[0043] As shown in Figure 3, when a specified audio device (not shown) is connected to the connection terminal j and music is played, the positive or negative pressure in the internal space S generated by the vibration of the cone paper causes the liquid L in the internal space S to flow in or out through the opening end E2, suppressing the generation of an air spring.

[0044] In detail, as shown in FIG. 3(a), when the cone paper vibrates in the direction of the internal space S, the air pressure in the internal space S rises. At this time, the liquid L that has entered the internal space S is pushed down, and the pushed-down liquid L flows out into the liquid container 3 through the opening end E2 so that the air pressure in the internal space S becomes equal to the outside air pressure.

[0045] Furthermore, as shown in Figure 3(b), when the cone paper vibrates in the direction opposite to the internal space S, the air pressure in the internal space S decreases. At this time, the external air pressure pushes down on the liquid L directly below the gap g and pushes up the liquid L that has entered the internal space S, and the liquid L flows into the internal space S through the opening end E2 so that the air pressure in the internal space S becomes equal to the external air pressure.

[0046] In this way, the liquid level of the liquid L in the internal space S rises and falls in response to the vibration of the cone paper, so that the air pressure in the internal space S is kept equal to the outside air pressure, and the generation of air springs that inhibit the vibration of the cone paper is suppressed. In addition, the anti-phase sound from the back of the cone paper is converted into potential energy that moves the liquid L up and down, and is not released to the outside as acoustic energy. Furthermore, the sound from the back side of the cone paper does not propagate to the outside through the liquid L because the acoustic impedances of air and liquid are significantly different.

[0047] When the speaker device X is to be relocated or transported, the user need only remove the filter member f (FIG. 4(a)) and lift the housing 2 upward (FIG. 4(b)). This allows the user to separate the housing 2 (and the speaker unit 1) from the liquid container 3.

[0048] As described above, according to this embodiment, the generation of air spring is suppressed by the liquid L, and the reproduced sound contains only positive phase components from the front surface of the cone paper, and the entire frequency range from low to high tones is not masked, resulting in a clear, fine, and realistic sound quality with excellent reproduction capability for minute signals.

[0049] Furthermore, as described above, the generation of air spring is suppressed, so that the entire housing 2 can be made smaller.

[0050] In addition, since the open end E2 is immersed in the liquid L and the liquid L is exposed to the outside air through the gap g, the sound pressure on the back of the cone paper acts directly on the liquid L, effectively suppressing the generation of air spring, resulting in reproduced sound with a more realistic sound quality.

[0051] Furthermore, since the liquid L is non-volatile, the liquid L can be used for a long period of time.

[0052] Furthermore, by providing the air-permeable filter member f in the gap g, the liquid L can be prevented from being contaminated by impurities.

[0053] <Embodiment 2> The speaker device according to the second embodiment of the present invention will be described below with reference to FIGS. In this embodiment, components that are basically the same as those in the previous embodiment are given the same reference numerals and their description will be simplified. In these figures, the symbol Y indicates the speaker device according to the present embodiment.

[0054] As shown in Figures 5 and 6, the speaker device Y includes a speaker unit 1, a housing 2 having opening ends E1 and E2 on one side (front) and the other side (rear bottom), and a liquid container 3 containing liquid L.

[0055] A connection terminal j of the speaker unit 1 in this embodiment protrudes from the rear surface of a first housing 21, which will be described later.

[0056] The housing 2 in this embodiment has a first housing 21 provided with an opening end E1, and a second housing 22 provided with an opening end E2.

[0057] The first housing 21 is a substantially rectangular box-like body, and is provided with an opening end E1 and a communication hole p1 on the rear surface thereof. The second housing 22 is a box-like body having a generally inverted L shape, and is provided with an opening end E2 and a communication hole p2 on the front surface thereof.

[0058] Here, the first housing 21 and the second housing 22 are detachably connected to each other. More specifically, the first housing 21 and the second housing 22 are connected by a pair of connecting means t in a state in which the communication holes p1, p2 are in communication with each other.

[0059] Each connecting means t is composed of a substantially L-shaped metal fitting t1 and a screw t2 that is inserted through the metal fitting t1 and penetrates into the first housing 21, and each metal fitting t1 is fixed to the second housing 22. Each connecting means t is provided on the left and right sides of the abutment portion of the first housing 21 and the second housing 22, respectively, but the installation location and the number of installations are not particularly limited, and the configuration of the connecting means t is not limited to the configuration of this embodiment as long as it is a known means. In order to increase the degree of sealing of the internal space S, a packing or the like may be provided at the contact point between the first housing 21 and the second housing 22.

[0060] The liquid container 3 in this embodiment is a roughly rectangular parallelepiped container that opens upward, into which a fixed amount of liquid L is poured.

[0061] Here, as shown particularly in FIG. 6, second housing 22 and liquid container 3 are integrated by a suspension portion k that is suspended from the outer circumferential surface of second housing 22 to the inner circumferential surface of liquid container 3. As shown in FIG. 6(b), one suspension portion k is provided on each surface. In FIG. 6(b), the liquid L is omitted.

[0062] Furthermore, the front surface of liquid holder 3 and the rear surface of first housing 21 are spaced apart by distance d. This makes it easier for the liquid L to release the sound pressure in the internal space S to the outside air.

[0063] By configuring the speaker device Y as described above, the liquid L is present in the path R that runs from the internal space S through the opening end E2 to the gap g. Other than that, the configuration in which the filter member f is provided in the gap g is the same as in the first embodiment.

[0064] As shown in FIG. 7, when music is played back, the speaker device Y of this embodiment also operates in a similar manner to the speaker device X of embodiment 1, in that the liquid level of the liquid L in the internal space S rises and falls in response to the vibration of the cone paper, thereby suppressing the generation of an air spring.

[0065] When replacing the liquid L or relocating or transporting the speaker device Y, the user simply removes the screws t2 (FIG. 8(a)) and moves the second housing 22 (and the liquid container 3) backward (FIG. 8(b)). This allows the user to separate the first housing 21 (and the speaker unit 1) from the second housing 22 (and the liquid container 3).

[0066] As described above, according to this embodiment, substantially the same effects as those of embodiment 1 are achieved, and in addition, it is possible to handle the first housing 21 and the second housing 22 separately while maintaining the speaker unit 1 facing forward as in a normal speaker device, thereby improving convenience when relocating, transporting, storing, etc.

[0067] <Embodiment 3> Hereinafter, the speaker device according to the third embodiment of the present invention will be described with reference to FIGS. In this embodiment, components that are basically the same as those in the previous embodiment are given the same reference numerals and their description will be simplified. In these figures, the symbol Z indicates the speaker device according to the present embodiment.

[0068] As shown in Figures 9 and 10, the speaker device Z includes a speaker unit 1, a housing 2 having opening ends E1 and E2 on one side (front) and the other side (rear bottom), and a liquid container 3 containing liquid L.

[0069] In this embodiment, the liquid L is loosely enclosed in the flexible bag A so that a predetermined space is formed inside the bag A. In other words, the amount of the liquid L in the bag A is a predetermined amount that does not generate tension on the surface of the bag A. Furthermore, as shown particularly in Figure 10, the bag body A with the liquid L sealed therein is contained in the liquid container 3 with the bag body A covering the entire bottom surface of the liquid container 3 and with almost the entire circumference of its outer peripheral surface (side surface) abutting the inner peripheral surface of the liquid container 3. The bag body A is preferably made of a resin material, for example.

[0070] The housing 2 in this embodiment is a substantially cylindrical body, similar to the first embodiment. The housing 2 also has protruding parts h protruding in all four directions from its outer circumferential surface. As a result, by placing each protrusion h on the opening edge of the liquid container 3, the housing 2 is inserted into the liquid container 3 with its opening end E2 spaced a predetermined distance from the bottom surface of the liquid container 3.

[0071] Here, in this embodiment, the liquid container 3 contains a bag body A in which the liquid L is sealed, and therefore, as shown particularly in Figure 10, the housing 2 is inserted into the liquid container 3 with its opening end E2 pressing and deforming the bag body A. As a result, the housing 2 is placed on the bag body A, the opening on the open end E2 side is closed by the bag body A, and the internal space S is in a sealed state.

[0072] Furthermore, as described above, since the liquid L is loosely sealed in the bag body A, no tension due to the liquid L is generated on the upper surface of the bag body A, and as shown in Figure 10, the upper surface closing the opening on the opening end E2 side is approximately parallel to the bottom surface of the liquid container 3 except for the portion deformed by pressure. Furthermore, as shown in Figure 10, liquid L is sealed in bag body A so as to fill the space between opening end E2 and the bottom surface of liquid container 3, but a smaller amount may be used as long as the sealed state is maintained even when the cone paper vibrates.

[0073] By configuring the speaker device Z as described above, the liquid L and the bag body A are interposed in the path R that leads from the internal space S through the opening end E2 to the gap g. Other than that, the configurations of the speaker unit 1 and the liquid container 3 are the same as those in the embodiment 1. Furthermore, in this embodiment, the spacer m and the filter member f are not necessary.

[0074] Although not shown in the figures, when music is played in the speaker device Z of this embodiment, the liquid level of the liquid L sealed in the bag A in the internal space S rises and falls in response to the vibration of the cone paper, in a manner similar to that of the speaker device X of embodiment 1, thereby suppressing the generation of an air spring.

[0075] When replacing the bag A or relocating or transporting the speaker device Y, the user only needs to move the housing 2 (and the speaker unit 1) upward (FIG. 11). This allows the user to separate the housing 2 (and the speaker unit 1) from the liquid container 3.

[0076] As described above, according to this embodiment, like the first embodiment, it is possible to use the liquid L to enable reproduction of realistic sound quality, while preventing leakage of the liquid L.

[0077] <Example of change> The shapes and dimensions of the components shown in the above embodiment are merely examples and can be modified in various ways based on design requirements, etc.

[0078] For example, the liquid container 3 in the speaker device X and the liquid container 3 in the speaker device Y may have an on-off valve v for discharging the liquid L. This makes it easier to transfer and transport the liquid L.

[0079] Furthermore, the existing enclosure types, such as the Kelton type and front-loaded horn type, each have a part of their structure formed from a sealed housing. By replacing the sealed housing parts of these types with the type of speaker device Y, the reproduction sound quality of these types is improved.

[0080] Moreover, the speaker device X may be modified as shown in FIG. That is, a speaker unit 1' similar to the speaker unit 1 may be placed in parallel to the speaker unit 1 between the speaker unit 1 and the liquid surface in the internal space S. At this time, the connection terminals j and j' are connected in parallel and in phase to the output terminals of the amplifier.

[0081] In the speaker device X thus configured, the speaker units 1 and 1' vibrate in phase with respect to an input signal, and no air spring acts at all in the internal space S1 between the speaker units 1 and 1'. On the other hand, in the internal space S2 between the speaker unit 1' and the liquid surface, the liquid surface of the liquid L in the internal space S2 rises and falls in response to the vibration of the cone paper, according to the same principle as in the speaker device X shown in Figure 1, etc., thereby suppressing the generation of an air spring. As a result, the speaker unit 1' operates to keep the air pressure in the internal space S1 always equal to atmospheric pressure, so that the vibrations of the speaker unit 1' are not propagated to the outside, and the speaker unit 1 always vibrates faithfully to the input signal in a completely air-spring-free state.

[0082] As a result, only the sound from the speaker unit 1 is reproduced from the speaker device X with excellent linearity and higher fidelity sound quality. In this modified example, the speaker units 1' can be installed in the internal spaces S of the speaker devices Y and Z, and higher fidelity sound reproduction can be achieved in each device.

[0083] Moreover, the speaker device X may be modified as shown in FIG. That is, in the housing 2, a gathered (pleated) membrane u1 that does not allow the liquid L to pass through but transmits air pressure well may be placed parallel to the speaker unit 1 between the speaker unit 1 in the internal space S and the liquid surface. Similarly, a gathered (pleated) film u2 may be provided in the gap g. The films u1 and u2 are made of, for example, resin.

[0084] As a result, the internal space S is divided by the film u1 into an internal space S1 and an internal space S2. At this time, the internal space S1 is sealed by the film u1, and similarly, the internal space S2 is also sealed.

[0085] In addition, since the film u1 transmits air pressure well, the internal space S1 and the internal space S2 operate as one unit against the air pressure. Furthermore, since film u2 also transmits air pressure well, the liquid L between the outer circumferential surface of housing 2 and the inner circumferential surface of liquid holder 3 is exposed to atmospheric pressure via film u2.

[0086] In this way, by using the membranes u1 and u2, which do not allow the liquid L to pass through but transmit air pressure well, the generation of air springs above and below the liquid level of the liquid L is suppressed, in the same principle as in the speaker device X shown in Figure 1, etc., and leakage of the liquid L can be prevented while enabling reproduction of realistic sound quality. In this modified example, the filter member f is not necessary. This modification can also be applied to the speaker device Y in the same manner.

[0087] Moreover, the speaker devices X to Z can be used as a so-called subwoofer by connecting them to a low-pass filter and a power amplifier for bass reproduction.

[0088] In addition, in the speaker devices X and Y, like the speaker device Z, the liquid L sealed in the bag A may be used.

[0089] In addition, the word "abbreviated" in the application documents is a concept that means that the subsequent shape may be chamfered or rounded, and also includes elements that make up the shape being deformed or changed in length within a range that does not impair the purpose of the shape. [Explanation of symbols]

[0090] X~Z Speaker Equipment 1 Speaker unit 2. Chassis E1, E2 open end 3 Liquid container S interior space g Gap L Liquid A Bag body

Claims

1. The device comprises a speaker unit that outputs sound waves based on an input audio signal, a housing having one and the other open ends, and a liquid container that contains a predetermined liquid, the speaker unit has one open end closed so that a rear surface of the speaker unit is exposed to an internal space of the housing; The other open end is inserted into the liquid container, a gap is formed between an outer circumferential surface of the housing and an inner circumferential surface of the liquid container, the gap communicating with the outside of the liquid container; the liquid is present in a path extending from the internal space of the housing to the outside via the other opening end.

2. The other open end is immersed in the liquid, The speaker device according to claim 1, wherein the liquid is exposed to the outside air through the gap.

3. The speaker device according to claim 2 , wherein the liquid is non-volatile.

4. The speaker device according to claim 2 , wherein a filter member having air permeability is provided in the gap.

5. The speaker device according to claim 2, wherein the liquid container has an opening / closing valve for controlling the discharge of the liquid.

6. the housing includes a first housing provided with the one opening end and a second housing provided with the other opening end, The speaker device according to claim 1 , wherein the first housing and the second housing are detachably connected to each other.

7. The liquid is sealed in a flexible bag so that a predetermined space is formed inside the bag, The speaker device according to claim 1, wherein the other open end is closed by being placed on the bag.

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