JP5691673B2 - Speaker system - Google Patents

Speaker system Download PDF

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Publication number
JP5691673B2
JP5691673B2 JP2011051468A JP2011051468A JP5691673B2 JP 5691673 B2 JP5691673 B2 JP 5691673B2 JP 2011051468 A JP2011051468 A JP 2011051468A JP 2011051468 A JP2011051468 A JP 2011051468A JP 5691673 B2 JP5691673 B2 JP 5691673B2
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speaker
component
electrostatic
sound
unit
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JP2012191314A (en
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毅 境
毅 境
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ヤマハ株式会社
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Description

  The present invention relates to a technique for emitting sound in a plurality of directions.

  There is a flat speaker system disclosed in Patent Document 1 as a speaker system in which flat speakers are combined so as to emit sound in different directions. This flat speaker system includes a pair of flat speakers, and the long side of the support frame to which one flat speaker is attached and the long side of the support frame of the other flat speaker are joined to each other so that one flat speaker is connected. The other flat speaker is positioned at an angle.

JP 2001-148893 A

  In the speaker system of Patent Document 1, for example, if a long side of a support frame is installed so as to be perpendicular to a horizontal plane and different signals are input to a pair of flat speakers, one speaker and the other speaker The sound can be emitted in different directions, and different sounds can be heard between a person to whom one planar speaker is directed and a person to which the other planar speaker is directed. However, with a flat speaker, there is little spread of sound depending on the distance, and in order to reach many people over a wide range in the horizontal direction with this flat speaker system, it is necessary to increase the horizontal width of each flat speaker. is there. When the width of the flat speaker is increased, the vibration membrane and the support frame of the flat speaker are enlarged, and the assembly of the speaker system becomes large.

  The present invention has been made under the above-described background, and an object of the present invention is to provide a technology capable of widely radiating a plurality of sounds in different directions without increasing the width of a speaker.

In order to solve the above-described problem, the present invention includes a plurality of first speakers arranged along a predetermined arrangement direction, and a plurality of second speakers arranged along the arrangement direction, wherein the plurality of first speaker, the first direction to emit a flat surface waves, the plurality of second speaker emits a flat surface wave to the second direction different from the first direction, the first speaker a first acoustic signal to be supplied, the second second acoustic signal supplied to the speaker Ri is Do different, the plurality of first speaker and the plurality of second speaker, said on possible plate-shaped component bent arranged are arranged alternately along the direction, the between said adjacent first speaker second speaker to provide a speaker system which is characterized that you have been mountain fold or valley fold.

  In the present invention, the first sound signal supplied to each of the plurality of first speakers is subjected to delay processing, and the second sound supplied to each of the plurality of second speakers. Each signal may be subjected to delay processing.

  In the present invention, images are formed on the surfaces of the first speaker and the second speaker, and an image formed on the surface of the first speaker and an image formed on the surface of the second speaker. May be configured differently.

  According to the present invention, a plurality of sounds can be radiated widely in different directions without increasing the width of each speaker.

1 is a front view of a speaker system 1 according to an embodiment of the present invention. FIG. 2 is a top view of the speaker system 1. 1 is an external view of an electrostatic speaker 10. FIG. FIG. 3 is a cross-sectional view of the electrostatic speaker 10. FIG. 3 is a cross-sectional view of the electrostatic speaker 10. The figure which showed the electrical structure of the electrostatic speaker. The figure for demonstrating the sound radiated | emitted from the speaker system. The figure for demonstrating the sound radiated | emitted from the speaker system. The figure which showed the speaker system 1 which concerns on a modification. The top view of the unit 100 which concerns on a modification. The top view of the unit 100 which concerns on a modification. The top view of the unit 100 which concerns on a modification. The top view of the unit 100 which concerns on a modification. The top view of the unit 100 which concerns on a modification. The external view of the unit 100 which concerns on a modification. The front view of the speaker system 1 which concerns on a modification. The front view of the speaker system 1 which concerns on a modification. The front view of the unit 100 which concerns on a modification. The figure which showed the unit 200 which concerns on a modification. The figure which showed the example of arrangement | positioning of the unit 200. FIG.

[Embodiment]
FIG. 1 is a front view of a speaker system 1 according to an embodiment of the present invention, and FIG. 2 is a top view of the speaker system 1. The speaker system 1 is disposed on a wall W of a long space such as a passage of a station, for example, and emits sound to passers-by of the passage.

The speaker system 1 according to the present embodiment has a configuration in which the units 100-1 to 100-6 are arranged in the longitudinal direction of the passage (first arrangement direction). The structures of the units 100-1 to 100-6 are the same. For this reason, when it is not necessary to distinguish each in the following description, description of a branch number is abbreviate | omitted.
The shape of the unit 100 is a tube shape whose cross-sectional shape is a right-angled isosceles triangle when viewed from the vertical direction. The unit 100 has a third part 103 fixed to the wall surface of the passage, a second part 102 having an angle of 45 ° with respect to the third part 103, and an angle of 45 ° with respect to the third part 103. A first part 101 is provided that forms an angle of 90 ° with the second part. The first component 101, the second component 102, and the third component 103 are obtained by processing a plate material, for example, cardboard, and have a plate shape and a rectangular shape. The length, width, and thickness of the first component 101 are the same as the length, width, and thickness of the second component 102. The first component 101 is bonded to the third component 103 and the second component 102, and the second component 102 is bonded to the third component 103 and the first component 101.

  The third component 103 is fixed to the wall surface of the passage. In addition, an electrostatic speaker 10A, which is an example of a flat speaker that emits plane wave sound waves, is fixed to the surface of the first component 101, and an electrostatic speaker 10B is also fixed to the surface of the second component 102. Yes. The electrostatic speaker 10A disposed in the first component 101 has a rectangular shape with a smaller area than the first component 101, and the electrostatic speaker 10B disposed in the second component 102 has the second component 102. It has a rectangular shape with a smaller area. Since the units 100 are arranged in the direction of the passage, the electrostatic speaker 10A and the electrostatic speaker 10B are also arranged along the longitudinal direction of the passage. The electrostatic speaker 10 </ b> A and the electrostatic speaker 10 </ b> B have the same configuration, although input signals are different. For this reason, when it is not necessary to distinguish each in the following description, description of “A” and “B” at the end of the reference numerals is omitted.

  3 is an external view of the electrostatic speaker 10, and FIG. 4 is a cross-sectional view taken along the line II of the electrostatic speaker 10. 5 is an exploded view of the electrostatic speaker 10, and FIG. 6 is a diagram showing an electrical configuration of the electrostatic speaker 10. As shown in FIG. In the figure, directions are indicated by orthogonal X-axis, Y-axis, and Z-axis, the left-right direction is the X-axis direction, the depth direction is the Y-axis direction, and the height direction is the Z-axis direction. Also, in the figure, “•” in “◯” means an arrow heading from the back of the drawing to the front. Further, in the figure, “x” in “◯” means an arrow pointing backward from the front of the drawing.

  As shown in the figure, the electrostatic speaker 10 includes a vibrating body 11, electrodes 20U and 20L, elastic members 30U and 30L, and protective members 60U and 60L. In the present embodiment, the configurations of the electrode 20U and the electrode 20L are the same, and the configurations of the elastic member 30U and the elastic member 30L are the same. For this reason, when there is no particular need to distinguish between these members, description of “L” and “U” at the end of the reference numerals is omitted. Further, since the protective member 60U and the protective member 60L have the same configuration, the description of “L” and “U” at the end of the reference numerals is omitted unless it is particularly necessary to distinguish between the protective members 60U and 60L. To do. In addition, the dimensions of the constituent elements such as the vibrating body and the electrodes in the drawing are different from the actual dimensions so that the shapes of the constituent elements can be easily understood.

  First, each part constituting the electrostatic speaker 10 will be described. The rectangular vibrating body 11 as viewed from a point on the Z axis is made of a synthetic resin film (insulating layer) having insulating properties and flexibility such as PET (polyethylene terephthalate) or PP (polypropylene). The conductive film (conductive layer) is formed by vapor-depositing a conductive metal on one surface of the film.

  The elastic member 30 is a non-woven fabric in the present embodiment, and allows air and sound to pass therethrough without passing electricity, and its shape is rectangular when viewed from a point on the Z-axis. The elastic member 30 has elasticity, and is deformed when a force is applied from the outside, and returns to its original shape when the force applied from the outside is removed. The elastic member 30 may be any member that has insulating properties, allows sound to pass through, and has elasticity. The elastic member 30 is formed by applying heat to a batting and compressing it, a woven cloth, a synthetic resin having insulating properties, and the like. It may be the one that was made. In this embodiment, the length of the elastic member 30 in the X-axis direction is longer than the length of the vibrating body 11 in the X-axis direction, and the length of the elastic member 30 in the Y-axis direction is the length of the vibrating body 11 in the Y-axis direction. It is longer than the length.

  The electrode 20 is made of an insulating synthetic resin film (insulating layer) such as PET or PP as a base material, and a conductive metal is deposited on one surface of the film to form a conductive film (conductive layer). It has a configuration. The electrode 20 has a rectangular shape when viewed from a point on the Z-axis, and has a plurality of holes penetrating from the front surface to the back surface, so that air and sound can pass therethrough. In addition, illustration of this hole is abbreviate | omitted in drawing. In the present embodiment, the length of the electrode 20 in the X-axis direction and the length in the Y-axis direction are the same as those of the elastic member 30.

  The protection member 60 is an insulating cloth. The protection member 60 has a rectangular shape when viewed from a point on the Z axis, and allows passage of air and sound. In the present embodiment, the length in the X-axis direction and the length in the Y-axis direction of the protection member 60 are the same as those of the elastic member 30.

  Next, the structure of the electrostatic speaker 10 will be described. In the electrostatic speaker 10, the vibrating body 11 is disposed between the lower surface of the elastic member 30U and the upper surface of the elastic member 30L. The vibrating body 11 is applied to the elastic member 30U and the elastic member 30L with an adhesive having a width of several millimeters inward from the edge in the left-right direction and the edge in the depth direction, and inside the portion where the adhesive is applied. Is not fixed to the elastic member 30U and the elastic member 30L.

  The electrode 20U is bonded to the upper surface of the elastic member 30U. The electrode 20L is bonded to the lower surface of the elastic member 30L. The electrode 20U is bonded to the elastic member 30U by applying an adhesive with a width of several millimeters inward from the left and right edges and the depth edge, and the electrode 20L is bonded to the left and right edges and the depth direction. An adhesive is applied with a width of several millimeters from the edge to the inside and is adhered to the elastic member 30L. The electrode 20 is not fixed to the elastic member 30 on the inner side of the portion where the adhesive is applied. The electrode 20U is in contact with the elastic member 30U on the side with the conductive film, and the electrode 20L is in contact with the elastic member 30L on the side with the conductive film.

  The protective member 60U is bonded to the upper surface of the electrode 20U. The protective member 60L is bonded to the lower surface of the electrode 20L. The protective member 60U is coated with an adhesive with a width of several millimeters inward from the left and right edges and the depth direction edge and adhered to the electrode 20U, and the protective member 60L has the left and right edges and the depth direction. An adhesive is applied with a width of several mm inward from the edge of the electrode and adhered to the electrode 20L. The protective member 60 is not fixed to the electrode 20 on the inner side of the portion where the adhesive is applied.

Next, an electrical configuration related to the electrostatic speaker 10 will be described. As shown in FIG. 6, the electrostatic speaker 10 is provided with an amplifier unit 130 to which an acoustic signal representing sound is input, a transformer 110, and a drive having a bias power source 120 that applies a DC bias to the vibrating body 11. A circuit 1000 is connected.
The electrode 20U is connected to the terminal T1 on the secondary side of the transformer 110, and the electrode 20L is connected to the other terminal T2 on the secondary side of the transformer 110. In addition, the vibrating body 11 is connected to the bias power source 120 through the resistor R1. The middle point terminal T3 of the transformer 110 is connected to the ground GND, which is the reference potential of the drive circuit 1000, via the resistor R2.
An acoustic signal is input to the amplifier unit 130. The amplifier unit 130 amplifies the input acoustic signal and outputs the amplified acoustic signal. The amplifier unit 130 includes terminals TA1 and TA2 that output acoustic signals. The terminal TA1 is connected to the primary terminal T4 of the transformer 110 via the resistor R3, and the terminal TA2 is connected to the resistor R4. Is connected to the other terminal T5 on the primary side of the transformer.

  Next, the operation of the electrostatic speaker 10 will be described. When an AC acoustic signal is input to the amplifier unit 130, the input acoustic signal is amplified and supplied to the primary side of the transformer 110. Then, when the acoustic signal boosted by the transformer 110 is supplied to the electrode 20 and a potential difference is generated between the electrode 20U and the electrode 20L, the vibrating body 11 between the electrode 20U and the electrode 20L has the electrode 20U. An electrostatic force that is attracted to either side of the electrode 20L works.

  Specifically, the polarity of the second acoustic signal output from the terminal T2 is opposite to that of the first acoustic signal output from the terminal T1. When a positive acoustic signal is output from the terminal T1 and a negative acoustic signal is output from the terminal T2, a positive voltage is applied to the electrode 20U, and a negative voltage is applied to the electrode 20L. Since a positive voltage is applied to the vibrating body 11 by the bias power source 120, the vibrating body 11 has a repulsive force acting on the electrode 20 </ b> U to which a positive voltage is applied, while a negative voltage is applied. A suction force acts between the electrode 20L and the electrode 20L. The vibrating body 11 is displaced to the electrode 20L side (the direction opposite to the Z-axis direction) according to these forces applied to the vibrating body 11.

  When a negative first acoustic signal is output from the terminal T1 and a positive second acoustic signal is output from the terminal T2, a negative voltage is applied to the electrode 20U and a positive voltage is applied to the electrode 20L. Is done. Since a positive voltage is applied to the vibrating body 11 by the bias power source 120, the vibrating body 11 has a repulsive force acting on the electrode 20 </ b> L to which a positive voltage is applied, while a negative voltage is applied. An attractive force acts between the electrode 20U and the electrode 20U. The vibrating body 11 is displaced to the electrode 20U side (Z-axis direction) in accordance with these forces applied to the vibrating body 11.

  In this manner, the vibrating body 11 is displaced (bends) in the positive direction of the Z axis and the negative direction of the Z axis in accordance with the acoustic signal, and vibration is generated by sequentially changing the displacement direction and the displacement amount. A sound wave corresponding to the vibration state (frequency, amplitude, phase) is generated from the vibrating body 11. The generated sound wave passes through the elastic member 30 having acoustic transparency, the electrode 20 and the protection member 60 and is emitted as sound to the outside of the electrostatic speaker 10.

Next, the acoustic signal supplied to the electrostatic speaker 10 of each unit will be described. In the present embodiment, the first acoustic signal is supplied to the electrostatic speakers 10A of the units 100-1 to 100-4, and the first acoustic signal is supplied to the electrostatic speakers 10B of the units 100-3 to 100-6. Are supplied with different second acoustic signals. When the first acoustic signal is supplied to the electrostatic speakers 10A of the units 100-1 to 100-4, the electrostatic speakers 10A to which the first acoustic signals are supplied are indicated by arrows A in FIG. A sound corresponding to the first acoustic signal is radiated in the width of the electrostatic speaker 10A in the direction of the perpendicular line dropped on the surface of the electrostatic speaker 10A (the normal direction of the radiation surface of the electrostatic speaker 10A).
Further, when the second acoustic signal is supplied to the electrostatic speakers 10B of the units 100-3 to 100-6, each electrostatic speaker 10B to which the second acoustic signal is supplied is indicated by an arrow B in FIG. As described above, the sound corresponding to the second acoustic signal is radiated in the width of the electrostatic speaker 10B in the direction of the perpendicular line (normal direction of the radiation surface of the electrostatic speaker 10B) lowered to the surface of the electrostatic speaker 10B. The
Since the directivity of the electrostatic speaker 10A is narrow and the attenuation due to the distance is small, the sound radiated from the electrostatic speaker 10A of the units 100-1 to 100-4 is normal to the radiation surface of the electrostatic speaker 10A. The sound is heard in the area A shown in FIG. Further, in the electrostatic speakers 10B of the units 100-3 to 100-6, the sound radiated from the electrostatic speakers 10B advances in the normal direction of the radiation surface of the electrostatic speakers 10B, and the area shown in FIG. Sounds in range B.
Thus, for example, as shown in FIG. 7, a passerby P (a passerby P who is in the area A and does not overlap with the area B) located on the right side of the center in the left-right direction toward the speaker system 1. The sound radiated from the electrostatic speakers 10A of the units 100-1 to 100-4 can be heard. Note that the second acoustic signal is supplied to the electrostatic speakers 10B of the units 100-3 to 100-6, and a sound corresponding to the second acoustic signal is radiated. The passerby P who is in the direction and does not reach the passerby P in the area A does not hear the sound of the second acoustic signal.

  Next, when the passerby P moves to the position shown in FIG. 8, the passerby P is located on the left side from the center in the left-right direction toward the speaker system 1 (in the area B and within the area A does not overlap. The passerby P) can hear the sound radiated from the electrostatic speaker 10B of the units 100-3 to 100-6. Note that the sound corresponding to the first acoustic signal is radiated from the electrostatic speakers 10A of the units 100-1 to 100-4, and the radiation direction of this sound is the direction of the arrow A in the area of FIG. Since the passer-by P in the position in B does not reach, the passer-by P does not hear the sound of the first acoustic signal.

  As described above, when the speaker system 1 according to the present embodiment is used, when the passerby P in front of the speaker system 1 passes along the arrangement direction of the units 100-1 to 106, it is halfway (when it is in the area A). ) Can hear only the sound radiated in the direction of arrow A (first direction), and only the sound radiated in the direction of arrow B (second direction) can be heard from the middle (when in area B). That is, since there are a plurality of sound emission directions and the sound contents are different for each emission direction, a plurality of sounds can be heard before the passerby P passes the front of the speaker system 1. For example, if the speaker system 1 is arranged in a passage of a station, the sound of an advertisement for an electric appliance is radiated in the direction of arrow A, and the sound of an advertisement for an electric store is radiated in the direction of arrow B, the electric appliance is interested. It is also possible to guide the passerby P to the electronic store where the electric product is sold.

(Modification)
As mentioned above, although embodiment of this invention was described, this invention is not limited to embodiment mentioned above, It can implement with another various form. For example, the present invention may be implemented by modifying the above-described embodiment as follows. In addition, you may combine each of embodiment mentioned above and the following modifications.

  In the above-described embodiment, the surface of the protective member 60 is plain, but an image such as a figure, a picture, a character, or a photograph may be formed on the surface of the protective member 60 by printing or projecting with a projector or the like. . In addition, when an image is formed on the protective member 60 in this way, an image such as a picture, a sentence, or a photograph related to the sound emitted by the electrostatic speaker 10 may be formed. For example, in the case of radiating the sound of the advertisement of the electric product in the direction of the arrow A and the sound of the advertisement of the electric store in the direction of the arrow B, a photograph of the electric product related to the advertisement is printed on the surface of the electrostatic speaker 10A. An explanation of how to go from the passage to the electronic store may be printed on the surface of the electrostatic speaker 10B. According to this configuration, since the advertisement can be performed on the printed matter in addition to the voice, the attention of the passerby P can be more attracted to the advertisement.

  In the embodiment described above, the unit 100 is fixed to the wall W. However, instead of being fixed to the wall W, the unit 100 is suspended from the ceiling with a wire or the like so as to have the arrangement shown in FIGS. May be. Further, each unit 100 may be fixed to the ceiling so as to have the arrangement shown in FIGS. 1 and 2 instead of hanging with a wire or the like. In addition, instead of being fixed to the wall W, the units 100 may be arranged side by side on the floor so as to have the arrangement shown in FIGS. 1 and 2. May be.

In the electrostatic speaker 10 described above, the protective member 60 is the same size as the electrode 20, but the protective member 60 may be configured to cover the entire surface of the first component 101. Moreover, when printing on the protection member 60, the same picture may be printed on each surface of the electrostatic speaker 10A of the units 100-1 to 100-4 that emit sound in the direction of the arrow A. As shown in FIG. 9, when the pictures printed on the surfaces of the electrostatic speakers 10 </ b> A of the units 100-1 to 100-4 are viewed from the extension line of the arrow A, a single picture may be obtained. .
In the above-described embodiment, the content of the sound radiated from the speaker system 1 and the content printed on the protection member 60 are advertisements, but are not limited to advertisements. For example, the speaker system 1 is installed. It may be other content such as guidance on the facility being used.

In the embodiment described above, the unit 100 is in the shape of a tube whose cross-sectional shape is a right isosceles triangle as viewed from the vertical direction, but the first component 101 and the second component 102 that include the electrostatic speaker 10. May be combined at right angles so that the third component 103 is not provided. FIG. 10 is a top view of the unit 100 according to this modification. If the unit 100 is fixed to the wall W of the passage so that the joining portion of the first part 101 and the second part 102 protrudes toward the passage side, the sound radiated in the direction of arrow A and the arrow B as in the embodiment described above. The sound radiated in the direction can be made different.
When the unit 100 includes the first component 101 and the second component 102 as described above, the first component 101 and the second component 102 are integrated with a hinge, and the first component 101 and the second component 102 are integrated. The angle formed by may be adjustable. Moreover, when joining the 1st component 101 and the 2nd component 102 at an angle, it is good also as a structure which fixes a joining part to the wall W, as shown in FIG. In this case, the electrostatic speaker 10A is disposed on the surface of the first component 101 opposite to the wall W, and the electrostatic speaker 10B is disposed on the surface of the second component 102 opposite to the wall W. . In this configuration, the first component 101 and the second component 102 may be mountainous with respect to the passer-by side as shown in FIG. 10, and the valley with respect to the passer-by as shown in FIG. It is good. Also in this configuration, the direction of the sound radiated from the electrostatic speaker 10A and the direction of the sound radiated from the electrostatic speaker 10B can be made different as in the above-described embodiment.

  In the embodiment described above, the shape of the unit 100 is a right-angled isosceles triangle as viewed from the vertical direction, but the shape of the cross-section is not limited to a right-angled isosceles triangle, but a regular triangle, It may be an isosceles triangle or an unequal triangle with different side lengths. For example, when viewed from the passerby P, the width of the first component 101 and the width of the second component 102 in the lateral direction may not be the same. FIG. 12 is a view showing a cross section when the unit 100 according to an example of this modification is cut in parallel to a horizontal plane. In FIG. 12, the widths of the first component 101, the second component 102, and the third component 103 are different from each other, the width of the second component 102 is wider than the width of the first component 101, and the cross-sectional shape is an unequal triangular shape. Yes.

  The sound radiated from the electrostatic speaker 10 is a plane wave. When the angle formed by the first component 101 and the second component 102 in the unit 100 is less than 90 °, the sound is radiated from the electrostatic speaker 10. You may provide a clearance gap between the adjacent units 100 so that the adjacent unit 100 may not be located in the plane wave sound emission area. FIG. 13 is a top view showing the positional relationship of the arrangement of the units 100 according to this modification. In this figure, since the sound radiated from the electrostatic speaker 10B of the unit 100-1 is a plane wave, it is radiated within the region indicated by two alternate long and short dash lines. For this reason, as shown in FIG. 13, the adjacent unit 100-2 is arranged so as not to fall within the region indicated by the two one-dot chain lines. According to this configuration, the sound radiated from the electrostatic speaker 10 is not blocked by the adjacent units. In the configuration of FIG. 13, there may be an image (content) such as a picture or a photograph between the unit 100-1 and the unit 100-2 on the wall where the unit 100 is installed. In addition, when the angle which the 1st component 101 and the 2nd component 102 make is an obtuse angle, without providing a clearance gap between the adjacent units 100, you may connect and arrange each unit.

  In the present invention, the first component 101 in which the electrostatic speaker 10A is disposed and the second component 102 in which the electrostatic speaker 10B is disposed have a plurality of holes penetrating from the front to the back. Good. Further, on the surface side of the first component 101 where the electrostatic speaker 10A is attached, a recess may be provided so that an air layer is formed between the first component 101 and the electrostatic speaker 10A.

  In the above-described embodiment, no acoustic signal is supplied to each of the electrostatic speakers 10B of the units 100-1 to 100-6, and the first sound is supplied to the electrostatic speakers 10A of the units 100-1 and 100-2. A second acoustic signal is supplied to the electrostatic speakers 10A of the units 100-3 and 100-4, and a third acoustic signal is supplied to the electrostatic speakers 10A of the units 100-5 and 100-6. It is good also as a structure to supply. In this case, it becomes an area where the sound of the first acoustic signal can be heard from the right side toward the speaker system 1, an area where the sound of the second acoustic signal can be heard, and an area where the sound of the third acoustic signal can be heard. Here, when the content of each acoustic signal is different, the passerby P can hear three kinds of sounds while passing in front of the speaker system 1.

In the embodiment described above, the unit 100 has the shape of a tube whose cross-sectional shape is a right-angled isosceles triangle when viewed from the vertical direction, but the cross-sectional shape is not limited to a triangle. For example, as viewed from the vertical direction, the cross-sectional shape may be a polygon other than a triangle such as a pentagon shown in FIG. 14A, a hexagon shown in FIG. 14B, or a trapezoid shown in FIG. It may be square.
In the case of the configuration shown in FIG. 14A, the first component 101 to the fifth component 105 are members having the same configuration as the first component 101 of the above embodiment, and the first component 101 to the fifth component 105 are Joined to form a pentagon when viewed from the vertical direction. Further, the electrostatic speaker 10 </ b> A is disposed on the surface of the third component 103, and the electrostatic speaker 10 </ b> B is disposed on the surface of the fourth component 104, and the first component 101 is fixed to the wall W.
In the case of the configuration shown in FIG. 14B, the first component 101 to the sixth component 106 are members having the same configuration as the first component 101 of the above embodiment, and the first component 101 to the sixth component 106 are They are joined so as to form a hexagon when viewed from the vertical direction. Further, the electrostatic speaker 10 </ b> A is disposed on the surface of the third component 103, the electrostatic speaker 10 </ b> B is disposed on the surface of the fifth component 105, and the first component 101 is fixed to the wall W. In the configuration shown in FIG. 14B, the electrostatic speaker 10 may be arranged on the surface of the fourth component 104.
In the case of the configuration shown in FIG. 14C, the first component 101 to the fourth component 104 are members having the same configuration as the first component 101 of the above embodiment, and the first component 101 to the fourth component 104 are They are joined to form a trapezoid when viewed from the vertical direction. Further, the electrostatic speaker 10A is disposed on the surface of the second component 102, the electrostatic speaker 10B is disposed on the surface of the fourth component 104, and the first component 101 is fixed to the wall W. In the configuration shown in FIG. 14C, the electrostatic speaker 10 may be disposed on the surface of the third component 103.
In addition, in each modification of Fig.14 (a)-FIG.14 (c), the structure which is not provided with the 1st component 101 may be sufficient.

  Further, in the present invention, the unit 100 is combined so that the first part 101 in which rectangular cardboard is cut as shown in FIG. 15 and the second part 102 in which the same cut is made intersect, The electrostatic speaker 10 </ b> A may be disposed on the surface of the component 101, and the electrostatic speaker 10 </ b> B may be disposed on the surface of the second component 102.

In the above-described embodiments and modifications, the unit 100 is configured by joining a plurality of plate-like components, and the speaker system 1 is configured by arranging the plurality of units 100. The configuration of the speaker system 1 is as follows. The configuration is not limited. For example, as shown in FIG. 16, a component 107 that is a rectangular plate-like cardboard is provided with alternating fold folds and valley folds, and the electrostatic speaker 10 is disposed between the folds. The speaker system 1 folded at the above may be disposed on the wall W of the passage.
Further, in the case where the component 107 which is a rectangular plate-like cardboard is provided with a mountain fold fold and a valley fold fold, as shown in FIG. 17A, the mountain fold → the mountain fold → the valley fold → A configuration in which folds are repeatedly provided such as mountain fold → mountain fold → valley fold →... According to this configuration, it is possible to arrange the electrostatic speaker 10 on the wall surface W as shown in FIG. 17B, and there are a plurality of sound emission directions, and the sound content for each emission direction. Can be different. In the configuration shown in FIG. 17, the electrostatic speaker 10 that is parallel to the wall W may not be provided.
Further, when the component 107 is provided with a crease, two mountain folds may be provided, and the fold may be folded to form a tube having a triangular cross section. According to this configuration, similarly to the unit 100 shown in FIG. 2, the horizontal cross section can form a triangular shape. Also, the component 107 may be provided with five fold folds to form a pentagonal cross section, or six fold folds may be provided to form a hexagonal cross section. Good.
In addition, the part 107 may be provided with a cut in addition to the crease so that the part 107 has a three-dimensional shape and the electrostatic speaker 10 is disposed on the surface thereof.
As for the mountain fold and the valley fold, the component 107 may be formed with a mountain shape and a valley shape by folding the crease so that the tip of the fold is a curved surface.

  In the above-described embodiment, for example, the electrostatic signal supplied to each electrostatic speaker 10A is set to each electrostatic signal so that the wavefronts of the sound radiated from the electrostatic speakers 10A of the units 100-1 to 100-4 are matched. A delay corresponding to the position of the type speaker 10A may be applied. Specifically, the amplifier unit 130 is provided with a delay circuit capable of controlling the delay amount of the acoustic signal. The acoustic signal supplied to the electrostatic speaker 10A of the unit 100-4 is not delayed. For example, when the width of the second component 102 is d, the acoustic signal supplied to the electrostatic speaker 10 of the unit 100-3 has Δt1 = d / c (c is the speed of sound) when the delay time is Δt1. Apply a delay. The acoustic signal supplied to the electrostatic speaker 10 of the unit 100-2 is delayed by Δt2 = 2d / c (where c is the speed of sound) when the delay time is Δt2. When the delay time is Δt3, the acoustic signal supplied to the type speaker 10 is delayed by Δt3 = 3d / c (c is the speed of sound). According to this configuration, the passerby P can hear the sound as if it was emitted from one sound source, and the connection of the sound radiated from each electrostatic speaker 10 is not discontinuous.

Further, the position of each electrostatic speaker 10 is adjusted to the sound supplied to the electrostatic speakers 10A of the units 100-1 to 100-4 so that the sound image moves in front of the passerby P as the passerby P moves. You may make it apply the delay according to.
Specifically, when the width of the second component 102 is d, first, the acoustic signal supplied to the electrostatic speaker 10A of the unit 100-2 is not delayed, and the electrostatic of the unit 100-1 The acoustic signal supplied to the type speaker 10A is delayed by Δt = d / c, where Δt is the delay time. Next, after a certain time has elapsed, the acoustic signal supplied to the electrostatic speaker 10A of the unit 100-3 is not delayed, and the acoustic signal supplied to the electrostatic speaker 10A of the unit 100-2 is Applies a delay of Δt. Further, after a certain period of time has passed, the acoustic signal supplied to the electrostatic speaker 10A of the unit 100-4 is not delayed so that the acoustic signal supplied to the electrostatic speaker 10A of the unit 100-3 Applies a delay of Δt. The speaker system 1 performs the above processing periodically.
In addition, in the structure which moves a sound image, it is good also as a structure which changes a delay time continuously from 0 to (DELTA) t. In this case, as a first step, first, the delay time is set to 0 for the units 100-1 to 100-6. Next, as a second step, the delay time is kept zero for the electrostatic speakers 10A of the units 100-2 and 100-4, and the delay is made relative to the electrostatic speakers 10A of the units 100-1 and 100-3. The time is continuously changed from 0 to Δt. Here, it is preferable that the time required for the change from 0 to Δt is a time required for the passerby P to pass in front of one unit or a time slightly earlier than this time. Thereafter, when the delay time of the first acoustic signal becomes Δt for the electrostatic speakers 10A of the units 100-1 and 100-3, the delay time is again set to 0 for the units 100-1 to 100-6 as the third step. And Next, as a fourth step, the delay time is kept zero for the electrostatic speakers 10A of the units 100-1 and 100-3, and the delay with respect to the electrostatic speakers 10A of the units 100-2 and 100-4 is delayed. The time is continuously changed from 0 to Δt. Again, the time taken for the change from 0 to Δt is preferably the time taken to pass in front of one unit or slightly earlier than this time. By repeating such processing from the first step to the fourth step, the passerby P feels that the sound image is moving as the passerby P moves.

In the embodiment described above, the speaker system 1 is arranged on the wall W of the flat passage, and each unit 100 has the same vertical position with respect to the wall W. The floors may be arranged on the walls of the passages having different heights, and the arrangement positions of the units 100 in the vertical direction may be varied in accordance with the passages having different heights. According to this configuration, even in a passage with different floor heights, such as stairs and escalators, it is possible to let the passerby hear different sounds depending on the position at the beginning of the climb and the position at the end of the climb.
Further, in the unit 100, one electrostatic speaker 10A is disposed on the first component 101 and one electrostatic speaker 10B is disposed on the second component 102. However, the present invention is not limited to this configuration. Absent. FIG. 18 is a front view of the unit 100 according to this modification. As shown in this figure, in this modification, two electrostatic speakers 10A are arranged vertically in the first component 101, and two electrostatic speakers 10B are arranged vertically in the second component 102. It has a configuration. Here, if the acoustic signal supplied to the electrostatic speaker 10A above the center in the vertical direction of the unit 100 is different from the acoustic signal supplied to the electrostatic speaker 10A below the center in the vertical direction, It is also possible to make the sound radiated to an adult located above the center of the unit 100 different from the sound radiated to a child whose ear is located above the center of the unit 100.
Further, the wall W to which the unit 100 is attached is not limited to a flat wall, and the wall surface may be a curved wall. Moreover, you may arrange | position the unit 100 along the wall surface of a spiral staircase.

In the embodiment described above, the shape of the unit 100 is tubular. However, the shape of the unit 100 is not limited to the tubular shape, and may be, for example, a cone shape. FIG. 19A is a top view of a unit 200 according to a modification, and FIG. 19B is a front view of the unit 200. FIG. Components 201 to 204 are plate-like cardboards having a shape of a right isosceles triangle. The component 205 is a plate-shaped square cardboard and serves as the bottom surface of the unit 200. The electrostatic speakers 10A to 10D are electrostatic speakers having the same configuration as that of the above-described embodiment, and the shape thereof is a triangle. The shapes of the electrostatic speakers 10A to 10D are not limited to triangles, and may be other polygons such as rectangles, pentagons or hexagons, and may be shapes other than polygons such as circles and ellipses. Also good.
Further, the shape of the unit 100 may be the shape of a frustum obtained by removing a cone that shares a vertex and is similarly reduced from the cone.

FIG. 20 is a diagram showing a state in which the units 200 are arranged in a row on the ceiling C. FIG. In FIG. 20, branch numbers are assigned so that each unit can be distinguished. In the arrangement shown in FIG. 20, the first acoustic signal is supplied to the electrostatic speakers 10A of the units 200-1 to 200-4, and the first acoustic signal is supplied to the electrostatic speakers 10C of the units 200-3 to 200-6. A second acoustic signal different from the signal is supplied. Then, as shown by an arrow A in FIG. 20, a sound corresponding to the first acoustic signal is radiated in the direction of a perpendicular line dropped on the surface of the electrostatic speaker 10A. Accordingly, for example, a passerby P located on the right side of the center of the speaker system 1 in FIG. 20 can hear the sound radiated from the electrostatic speaker 10A of the units 200-1 to 200-4 from above. Note that the second acoustic signal is supplied to the electrostatic speakers 10C of the units 200-3 to 200-6, and a sound corresponding to the second acoustic signal is radiated. Since the direction does not reach the passer-by P, the passer-by P in the position of FIG. 20 does not hear the sound of the second acoustic signal. Thereafter, when the passerby P moves to the left, the passerby P can hear the sound emitted from the electrostatic speaker 10C of the units 200-3 to 200-6 from above.
In the configuration of FIG. 20, the third acoustic signal may be further supplied to the electrostatic speaker 10B of each unit, and the fourth acoustic signal may be supplied to the electrostatic speaker 10D of each unit. . Thereby, when the passerby P is located in the direction in which the electrostatic speaker 10B faces, the sound radiated from the electrostatic speaker 10B of the units 200-1 to 200-6 is heard from above, and the passerby P Is located in the direction in which the electrostatic speaker 10D faces, the sound radiated from the electrostatic speakers 10D of the units 200-1 to 200-6 can be heard, and the sound can be heard from four diagonally upward directions. As a result, a plurality of different sounds can be emitted in more directions. Unit 200 may be arranged on ceiling C in a plurality of rows and a plurality of columns.

  In the embodiment described above, the speaker included in the unit 100 or the unit 200 is an electrostatic speaker. However, the speaker according to the present invention is not limited to an electrostatic speaker, and may be a speaker that emits plane waves. For example, another type of speaker may be used.

  In the embodiment described above, the first acoustic signal is also supplied to the electrostatic speaker 10A of the unit 100-5, and the second acoustic signal is also supplied to the electrostatic speaker 10B of the unit 100-2. Good. According to this configuration, area A and area B are expanded as compared with FIG. 7, and the area where area A and area B overlap is widened. Here, when the passer-by P walks from the unit 100-1 to the unit 100-6 at a position close to the speaker system 1, the passer-by P first hears only the sound of the first acoustic signal in the area A, and then In the area where area A and area B overlap, the sound of the first acoustic signal and the sound of the second acoustic signal are heard, and then only the sound of the second acoustic signal is heard in area B. When the passerby P walks from the unit 100-1 to the unit 100-6 at a position away from the speaker system 1, the passerby P does not enter the area where the area A and the area B overlap. For this reason, the passerby P first hears only the sound of the first acoustic signal in the area A. Next, at the position outside area A and area B, the sound of both the first sound signal and the second sound signal cannot be heard, and when entering area B, only the sound of the second sound signal is heard. Become.

  In the embodiment described above, the first acoustic signal may be supplied to the electrostatic speaker 10A of each unit, and the second acoustic signal may be supplied to the electrostatic speaker 10B of each unit. In this configuration, the volume of the electrostatic speaker 10A is decreased as it goes from the unit 100-1 to the unit 100-6, and the volume of the electrostatic speaker 10B is the unit 100-6. The volume may decrease as it goes from unit to unit 100-1.

DESCRIPTION OF SYMBOLS 1 ... Speaker system, 10, 10A-10D ... Electrostatic speaker, 11 ... Vibrating body, 20, 20U, 20L ... Electrode, 30, 30U, 30L ... Elastic member, 60, 60U, 60L ... Protection member, 100, 100 -1 to 100-6 ... unit 101 ... first part 102 ... second part 103 ... third part 104 ... fourth part 105 ... fifth part 106 ... sixth part 107 ... part 110 ... Transformer, 120 ... Bias power supply, 130 ... Amplifier unit, 200, 200-1 to 200-6 ... Unit

Claims (3)

  1. A plurality of first speakers arranged along a predetermined arrangement direction;
    A plurality of second speakers arranged along the arrangement direction,
    Wherein the plurality of first speaker emits a flat surface wave to the first direction,
    Wherein the plurality of second speaker emits a flat surface wave to the second direction different from the first direction,
    Wherein the first acoustic signal first supplied to a speaker, Ri second acoustic signal goes different supplied to the second speaker,
    The plurality of first speakers and the plurality of second speakers are alternately arranged along the arrangement direction on a bendable plate-like component, and the first speaker and the second speaker adjacent to each other are arranged. speaker system while characterized that you have been mountain fold or valley fold.
  2. Each of the first acoustic signals supplied to each of the plurality of first speakers is subjected to delay processing, and each of the second acoustic signals supplied to each of the plurality of second speakers is delayed. The speaker system according to claim 1, wherein the speaker system is processed.
  3. Images are formed on the surfaces of the first speaker and the second speaker,
    Loudspeaker system of claim 1 or claim 2, characterized in that the image formed on the surface of the first image and the second speaker are formed on the surface of the speaker is different.
JP2011051468A 2011-03-09 2011-03-09 Speaker system Expired - Fee Related JP5691673B2 (en)

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Family Cites Families (7)

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Publication number Priority date Publication date Assignee Title
GB9709969D0 (en) * 1997-05-17 1997-07-09 New Transducers Ltd An acoustic object
JP3408476B2 (en) * 1999-11-19 2003-05-19 エヌイーシービューテクノロジー株式会社 Flat speaker system
JP4349123B2 (en) * 2003-12-25 2009-10-21 ヤマハ株式会社 Audio output device
JP2005217777A (en) * 2004-01-29 2005-08-11 Taisei Corp Sound guidance system
JP4591145B2 (en) * 2004-10-27 2010-12-01 ヤマハ株式会社 Acoustic system
JP2008028652A (en) * 2006-07-20 2008-02-07 Yamaha Corp Curtain speaker
US8128342B2 (en) * 2008-10-09 2012-03-06 Manufacturing Resources International, Inc. Multidirectional multisound information system

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