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WO2017037806A1 - Système de haut-parleurs pour corps en mouvement - Google Patents

Système de haut-parleurs pour corps en mouvement Download PDF

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Publication number
WO2017037806A1
WO2017037806A1 PCT/JP2015/074531 JP2015074531W WO2017037806A1 WO 2017037806 A1 WO2017037806 A1 WO 2017037806A1 JP 2015074531 W JP2015074531 W JP 2015074531W WO 2017037806 A1 WO2017037806 A1 WO 2017037806A1
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WO
WIPO (PCT)
Prior art keywords
speaker
moving body
rear side
sound
tube member
Prior art date
Application number
PCT/JP2015/074531
Other languages
English (en)
Japanese (ja)
Inventor
孝之 根岸
泰美 梅津
中村　徹
鈴木　達也
Original Assignee
パイオニア株式会社
東北パイオニア株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by パイオニア株式会社, 東北パイオニア株式会社 filed Critical パイオニア株式会社
Priority to PCT/JP2015/074531 priority Critical patent/WO2017037806A1/fr
Priority to JP2017537711A priority patent/JP6475343B2/ja
Priority to US15/755,398 priority patent/US20180244212A1/en
Priority to EP16841475.3A priority patent/EP3343944B1/fr
Priority to JP2017537712A priority patent/JP6462885B2/ja
Priority to PCT/JP2016/073857 priority patent/WO2017038442A1/fr
Priority to US15/755,438 priority patent/US10486614B2/en
Priority to PCT/JP2016/073858 priority patent/WO2017038443A1/fr
Publication of WO2017037806A1 publication Critical patent/WO2017037806A1/fr

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R11/00—Arrangements for holding or mounting articles, not otherwise provided for
    • B60R11/02—Arrangements for holding or mounting articles, not otherwise provided for for radio sets, television sets, telephones, or the like; Arrangement of controls thereof
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R1/00—Details of transducers, loudspeakers or microphones
    • H04R1/02—Casings; Cabinets ; Supports therefor; Mountings therein
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R5/00—Stereophonic arrangements
    • H04R5/02—Spatial or constructional arrangements of loudspeakers

Definitions

  • the present invention relates to a speaker system for a moving body.
  • a vehicle-mounted speaker device (speaker system for a moving body) using a sound radiated from the back side has been proposed (see, for example, Patent Document 1) while a speaker is disposed in an instrument panel of a vehicle.
  • a speaker is installed with the upper surface of the instrument panel as the front side, and the speaker is accommodated in a cylindrical acoustic tube (tube member).
  • the low-frequency component of the sound generated on the back side of the speaker resonates in the acoustic tube and is emitted from the lower surface of the instrument panel.
  • the empty space in the instrument panel is limited, and if it is arranged like the in-vehicle speaker device described in Patent Document 1, the sound pressure of the radiated sound from the speaker may be insufficient. Such inconvenience may also occur when the speaker device is provided at another position of the vehicle as a moving body.
  • the sound radiated from the acoustic tube is less likely to reverberate in the vehicle interior space, and the acoustic characteristics in the low sound range are difficult to improve.
  • an object of the present invention is to provide a moving body speaker system capable of improving acoustic characteristics, as an example.
  • a moving body speaker system includes a speaker unit that emits sound from the front surface toward a box-shaped space formed by the moving body.
  • the speaker unit including at least two speaker units each including a storage unit that stores a rear surface of the speaker unit, and a tube member having one end connected to the internal space of the storage unit and the other end opened in the box-shaped space,
  • the two speaker devices are respectively disposed at the corners on the front side and the rear side in the traveling direction of the moving body, or on one side and the other side in the width direction.
  • a speaker system for a moving body includes a speaker unit that emits sound from a front surface toward a box-shaped space formed by the moving body, a housing portion that houses a back surface of the speaker unit, And at least two speaker devices having one end connected to the internal space and the other end opened in a box-shaped space.
  • the two speaker devices are respectively disposed at the corners on the front side and the rear side in the traveling direction of the moving body or on one side and the other side in the width direction.
  • the moving body speaker system includes at least two speaker devices, and each of the moving body speaker systems is disposed at two corners of the moving body, so that the entire moving body speaker system can be used even if the empty space at each corner is small.
  • the sound pressure of the radiated sound can be improved and the acoustic characteristics can be improved.
  • the low frequency range corresponding to the length of the tube member The component resonates in the tube member and is emitted from the other end.
  • the accommodating part and the pipe member may be integrally formed.
  • the speaker unit in the speaker device arranged on the front side and the speaker unit in the speaker device arranged on the rear side with a predetermined time difference. Therefore, the position of the node of the standing wave formed in the space of the moving body by the radiated sound of the two speaker units can be appropriately adjusted, and good acoustic characteristics can be obtained.
  • the other end of the tube member in the speaker device arranged on the front side opens toward the front intersection where at least two of the surfaces surrounding the space intersect, and the tube in the speaker device arranged on the rear side
  • the other end of the member opens toward the rear side intersection where at least two surfaces of the plurality of surfaces intersect, and is a standing wave formed by sound waves radiated from the other ends of the front and rear tube members. Is preferably equal to the distance between the front intersection and the rear intersection. Thereby, the sound waves radiated from the other ends of the front and rear tube members are reflected at each intersection, and a standing wave is formed between the intersections.
  • a standing wave having a wavelength equal to the interval between the intersections is generated, so that the position of the node of the standing wave is adjusted as described above, and the acoustic characteristics in a sound having a relatively long wavelength (ie, bass) are improved. Can be made.
  • the node of the standing wave with such a wavelength is formed at an intermediate position between the intersecting portions.
  • a front side intersection part is a thing where a front surface and at least 1 other surface cross
  • a back side intersection part is a thing where a rear surface and another at least 1 surface intersect.
  • the tube member of the speaker device disposed on the rear side and one side extends from the housing portion toward the other side, and the tube member of the speaker device disposed on the rear side and the other side is directed from the housing portion toward the one side. Preferably it extends.
  • the tube member can be lengthened, and a sound wave having a relatively long wavelength can be resonated in the tube member. Therefore, the acoustic characteristics of the bass can be further improved.
  • the speaker unit arranged on the front side is provided on the upper surface of the instrument panel of the moving body, and the other end of the tube member on the front side is below the instrument panel, and the moving direction of the moving body is a plurality of surfaces. It may be opened toward the corner where the front surface, the lower surface and the side surface intersect. Thereby, the speaker unit is provided in the instrument panel, and the sound emitted from the front side on the upper surface of the instrument panel can be easily delivered to the passenger. Further, the other end of the tube member is opened toward the corner where the front, bottom and side surfaces of the moving body intersect below the instrument panel, so that the bass emitted from the other end is reflected by three surfaces. Thus, it is easy to reverberate in the space of the moving body, and it is possible to further improve the acoustic characteristics such as the sound pressure in the low frequency range in the moving body speaker system.
  • a speaker unit disposed on the rear side is provided so as to radiate sound toward the upper surface of the moving body, and the other end of the tube member on the rear side is a rear surface in the traveling direction of the moving body among the plurality of surfaces. You may open toward the corner
  • the mobile body in the present embodiment includes the above mobile body speaker system.
  • at least two speaker devices are arranged at two corners on one side and the other side in the front and rear of the moving body or in the width direction to radiate sound.
  • the acoustic characteristics can be improved.
  • FIG. 1 is a side view showing a vehicle C provided with a moving body speaker system 1 according to an embodiment of the present invention
  • FIG. 2 is a plan view showing the vehicle C provided with a moving body speaker system 1.
  • 3 is a front view showing the main part of the tube member 4 of the mobile speaker system 1
  • FIG. 4 is a perspective view showing the tube member 4
  • FIG. 5 is a mobile speaker system.
  • 6 is a rear view showing speaker devices 10C and 10D on the rear side in FIG. 1
  • FIG. 6 is a graph showing sound pressure characteristics in a speaker system for moving bodies according to a modification of the present invention
  • FIG. It is a graph which shows the sound pressure characteristic in the speaker system 1 for moving bodies.
  • the moving body speaker system 1 is provided in a vehicle C as a moving body and includes four speaker devices 10A to 10D as shown in FIGS.
  • the vehicle C includes an inner surface of a windshield (front glass) W, an upper surface (top surface) S1 and a lower surface (bottom surface) S2 of the vehicle body, a front surface S3 in the traveling direction (front-rear direction) of the vehicle C, and a width direction.
  • a box-shaped vehicle interior space A1 surrounded by a pair of opposing side surfaces S4 (including a vehicle door) and a rear surface S5 in the traveling direction of the vehicle C is formed.
  • An instrument panel I is provided on the front surface S3, and a driver seat SH1 and a passenger seat SH2 are provided as front seats so as to face the rear side of the instrument panel I.
  • a three-seat bench-shaped rear seat SH3 is provided on the rear side of the driver seat SH1 and the passenger seat SH2.
  • the head positions when the passengers are seated in the driver seat SH1 and the passenger seat SH2 are the head positions H1 and H2, respectively, and the head positions when the passengers are seated in the respective seating positions of the rear seat SH3, Head positions H3 to H5 are sequentially set from the driver seat SH1 side.
  • the speaker device 10A is provided in a corner CR1 on the front side in the front-rear direction and the driver seat SH1 side in the width direction (right side when facing the front side in the illustrated example) in the vehicle interior space A1.
  • the speaker device 10B is provided in a corner CR2 on the front passenger seat SH2 side in the vehicle interior space A1 (left side when facing the front side in the illustrated example) in the width direction.
  • the speaker device 10C is provided in a corner CR3 on the rear side in the front-rear direction and on the driver seat SH1 side in the vehicle interior space A1.
  • the speaker device 10D is provided in a corner CR4 on the rear side and on the passenger seat SH2 side in the vehicle interior space A1.
  • the four speaker devices 10A to 10D are arranged at different corners CR1 to CR4.
  • standing waves can be generated in the front-rear direction and the width direction of the vehicle C, and the acoustic characteristics in the vehicle interior space A1 can be improved.
  • sound waves are emitted from the speaker devices 10A to 10D toward the passenger seated in the driver's seat SH1, the passenger seat SH2, and the rear seat SH3, so that the passenger can listen to the reproduced sound with a sense of reality,
  • the space A1 can be a comfortable space.
  • the speaker devices 10A to 10D respectively include speaker units 2A to 2D, enclosures 3A to 3D as housing portions for housing the speaker units 2A to 2D, and tube members 4A to 4D connected to the enclosures 3A to 3D.
  • the speaker device 10 ⁇ / b> A and the speaker device 10 ⁇ / b> B on the front side facing each other in the width direction are configured to be substantially plane-symmetric with respect to a plane substantially orthogonal to the width direction.
  • the rear speaker device 10C and the speaker device 10D have the same symmetry. Accordingly, when only one of the speaker devices 10A and 10B is described below, the other has the same configuration, and when only one of the speaker devices 10C and 10D is described, the other has the same configuration. To do.
  • the speaker units 2A to 2D support a diaphragm, a voice coil supported by the diaphragm, an edge connecting the diaphragm to the frame, a magnetic circuit for driving (vibrating) the voice coil, and the edge and the magnetic circuit.
  • the speaker units 2A to 2D may emit sound waves so that the sound pressure in the middle and high sound range (for example, 1000 to 10000 Hz) is higher than the sound pressure in the low sound region (for example, 10 to 1000 Hz).
  • the diaphragm is installed so that the speaker units 2A to 2D radiate sound waves (front side) upward of the vehicle C and the magnetic circuit side (rear side) downward of the vehicle C. .
  • the instrument panel I so that the vibration direction (sound radiation direction) of the diaphragms of the speaker units 2A and 2B on the front side is inclined by a predetermined angle (for example, 30 °) with respect to the upper surface of the instrument panel I.
  • Speaker units 2A and 2B may be provided in the case.
  • the rear speaker units 2C and 2D may be provided such that the vibration direction (or sound radiation direction) of the diaphragm is substantially orthogonal to the upper surface S1.
  • the speaker unit 2 may be attached so that the diaphragm is disposed along the upper surface of the instrument panel I. Further, the central axis or diaphragm of the speaker units 2A to 2D may be directed to each seat SH1, SH2 (each seating position in the rear seat SH3).
  • Enclosures 3A to 3D are formed in a box shape, and a diaphragm is disposed on the top surface. Speaker units 2A to 2D are disposed in an internal space formed by a bottom surface and four side surfaces, and speaker units 2A to 2D. A portion on the back side of the housing is accommodated in the enclosures 3A to 3D.
  • the enclosures 3A and 3B on the front side are provided, for example, in the instrument panel I, and the enclosures 3C and 3D on the rear side are provided, for example, above the trunk room.
  • the enclosures 3A to 3D have an inclined surface on the top so that the sound waves radiated from the diaphragm are prevented from being reflected by a part of the enclosure 3 and the sound waves are radiated to the interior space A1. May be provided. Further, the enclosures 3A to 3D are disposed in the vicinity of the side surface S4 in the width direction, and are disposed at the corners CR1 to CR4, respectively.
  • the front speaker units 2A and 2B are provided in the instrument panel I so as to emit sound waves from the front surface on the upper surface of the instrument panel I by being accommodated in the enclosures 3A and 3B as described above.
  • the rear speaker units 2A and 2B are provided above the trunk room so as to emit sound waves from the front surface toward the upper surface S1.
  • sound waves generated on the back side of the speaker units 2A to 2D are radiated toward the internal spaces of the enclosures 3A to 3D.
  • the pipe members 4A to 4D are formed in a cylindrical shape having both ends opened using a known metal or resin, and the cross-sectional shape and cross-sectional area thereof are substantially constant from one end 41 side to the other end 42 side.
  • the length is formed to have a frequency (for example, 30 to 100 Hz).
  • the front side tube members 4A and 4B and the rear side tube members 4C and 4D have substantially the same length, and will be described later after the speaker units 2A to 2D operate (the diaphragm vibrates). It is assumed that the time required until the sound wave is emitted at the other end 42 is substantially equal.
  • the tube members 4A and 4B on the front side are connected to the inner space of the enclosures 3A and 3B by connecting one end 41 to the lower surface on the back side of the speaker units 2A and 2B in the enclosures 3A and 3B. It is arranged at the foot of the driver seat SH1 or the passenger seat SH2 (in the vicinity of the accelerator pedal in the driver seat SH1). As shown in FIGS. 3 and 4, the other end 42 opens below the instrument panel I toward the corner C ⁇ b> 1 where the front surface S ⁇ b> 3, the lower surface S ⁇ b> 2, and the side surface S ⁇ b> 4 intersect. Further, the pipe members 4A and 4B pass through the instrument panel I on the one end 41 side, and project outside the instrument panel I on the other end 42 side.
  • the pipe member 4A on the driver seat SH1 side extends from the one end 41 to the other end 42 in the width direction so as to be once separated from the side surface S4 on the driver seat SH1 side, and then extends so as to approach the side surface S4 again. Yes. That is, when the tube member 4A is viewed from the front-rear direction, the tube member 4A has a convexly curved shape toward the passenger seat side. Moreover, the pipe members 4A and 4B extend in the front-rear direction so as to go to the front side from the one end 41 toward the other end 42.
  • the pipe members 4C and 4D on the rear side are connected to the inner space of the enclosures 3C and 3D by connecting one end 41 to the inner side surface of the enclosures 3C and 3D in the width direction of the moving body. In addition, it extends outward. That is, from one end 41 to the other end 42, the pipe member 4C on the driver seat SH1 side extends from the enclosure 3C toward the passenger seat SH2, and the pipe member 4D on the passenger seat SH2 side extends from the enclosure 3D to the driver seat SH1 side. It extends towards.
  • the pipe members 4C and 4D extend rearward from one end 41 to the other end 42 in the front-rear direction of the vehicle C, and the other end 42 of the pipe member 4C is located on the rear side of the enclosure 3D. The other end 42 is located on the rear side of the enclosure 3C.
  • the pipe members 4C and 4D extend so as to cross each other.
  • the other end 42 of the tube members 4C and 4D is open toward the corner C2 where the upper surface S1, the rear surface S5, and the side surface S4 intersect, although it is separated from the upper surface S1.
  • angular part shall be included in the cross
  • sound waves radiated from the front side of the front speaker units 2A and 2B travel obliquely rearward according to the inclination of the diaphragm, for example, when the diaphragm has a cone or dome shape, It heads for head positions H1 and H2 on the front side.
  • the sound wave radiated from the front side may be reflected by the windshield W or the upper surface S1 and directed toward the head positions H1 and H2.
  • sound waves radiated from the front side of the speaker units 2C and 2D on the rear side are reflected directly or on the upper surface S1 and the rear surface S5 and head toward the head positions H3 to H5 on the rear side.
  • Sound waves generated on the back side of the speaker units 2A to 2D resonate in the internal spaces of the enclosures 3A to 3D, enter the tube members 4A to 4D from the one end 41, and travel through the tube members 4A to 4D.
  • the low-frequency component corresponding to the length of the tube members 4A to 4D resonates in the tube members 4A to 4D. Accordingly, sound waves mainly including low-frequency components are radiated from the other ends 42 of the tube members 4A to 4D. In other words, the sound wave radiated from the other end 4B of the open tube member 4 is cut in the mid-high range component.
  • the term “cut” means that the sound pressure of the medium and high frequency components is lower than the sound pressure of the low frequency components.
  • the sound wave radiated from the other end 42 of the tube members 4A and 4B on the front side is reflected by the corner C1 and the surrounding surfaces S2 to S4, and the corner C2 facing the corner C1 (that is, the angle in the width direction). It proceeds toward the corner C2) opposite to the part C1.
  • the sound wave radiated from the other end 42 of the tube members 4C, 4D on the rear side is reflected by the corner portion C2 and the surrounding surfaces S1, S5, S4, and travels toward the opposite corner portion C1.
  • a standing wave is formed between the corners C1 and C2 facing each other in the front-rear direction and the width direction of the vehicle C.
  • This standing wave has corners C1 and C2 as fixed ends, and has a wavelength corresponding to the interval between the corners C1 and C2.
  • sound waves mainly composed of middle and high frequency components emitted from the front side of the speaker units 2A to 2D and the other ends of the tube members 4A to 4D are obtained.
  • Sound waves mainly composed of low-frequency components radiated from 42 resonate.
  • the speaker units 2A and 2B on the front side and the speaker units 2C and 2D on the rear side are rearward from the head positions H1 and H2 on the front side, as will be described in detail below. So as to be separated from each other by a predetermined time difference.
  • the predetermined time difference include 1 ms to 9 ms.
  • the characteristics are shown in FIG.
  • the horizontal axis in FIG. 6 represents the logarithm of the frequency
  • the vertical axis represents the sound pressure
  • the sound pressure characteristic means the frequency dependence of the sound pressure.
  • the solid line in the graph indicates the sound pressure at the head positions H1 and H2 on the front side
  • the broken line indicates the sound pressure at the head positions H1 to H3 on the rear side.
  • angular part C1, C2 shall be about 1.7 m.
  • the sound pressures at the head positions H1 and H2 on the front side and the head positions H1 to H3 on the rear side were minimum values (about 69 dB and about 82 dB, respectively) at 200 to 210 Hz.
  • this frequency When this frequency is converted into a wavelength, it becomes substantially equal to the interval between the corners C1 and C2. That is, it is considered that a standing wave having a wavelength substantially equal to the interval between the corners C1 and C2 is formed, and the sound pressure is reduced by the node of the standing wave.
  • FIG. 7 The sound pressure characteristics are shown in FIG.
  • the axis in FIG. 7 is the same as that in FIG. 6, and the solid line in the graph indicates the sound pressure at the head positions H1 and H2 on the front side, and the broken line indicates the sound pressure at the head positions H1 to H3 on the rear side.
  • the sound pressure at the head positions H1 and H2 on the front side was about 91 dB at 200 to 210 Hz, which was hardly reduced compared to the front and rear frequencies, and no significant reduction was observed at other frequencies. Further, the sound pressure at the head positions H3 to H5 on the rear side was a minimum value (about 82 dB) at 200 to 210 Hz. Accordingly, the front and rear speaker units 2A and 2C are operated so as to have a time difference, and the position of the standing wave is separated from the head positions H1 and H2 on the front side to the rear side, thereby corresponding to the wavelength of the standing wave. It was confirmed that the sound pressure characteristics improved in frequency.
  • the mobile speaker system 1 includes the four speaker devices 10A to 10D, which are arranged at the four corners CR1 to CR4 of the vehicle C, so that the space at each corner CR1 to CR4 is empty. Even if the space is small, the sound pressure of the radiated sound of the entire moving body speaker system 1 can be improved and the acoustic characteristics can be improved.
  • the length of the tube members 4A to 4D is determined.
  • the low-frequency component resonates within the tube member and is emitted from the other end 42.
  • the other ends 42 of the pipe members 4A to 4D are opened toward the corners C1 and C2 where three of the plurality of surfaces surrounding the vehicle interior space A1 intersect, so that three bass sounds radiated from the other end 42 are generated. It is easily reflected by the surface and reverberates in the vehicle interior space A1, and the acoustic characteristics of the low frequency range in the moving body speaker system 1 can be improved.
  • the vibration of the speaker units 2A to 2D may be reduced. It is possible to suppress generation of abnormal noise due to vibration transmitted to the vehicle body.
  • by improving the acoustic characteristics in the low sound range as described above it is possible to obtain good acoustic characteristics even when small speaker units 2A to 2D having a low sound pressure in the low sound range are used.
  • the sound pressure of the low sound emitted from the front surfaces of the speaker units 2A to 2D is relatively low, the sound waves emitted from the front surfaces of the speaker units 2A to 2D and the other end 42 of the tube members 4A to 4D in the low sound range. It is difficult to weaken the sound waves emitted from.
  • sound waves in the middle and high sounds are mainly emitted from the front surfaces of the speaker units 2A to 2D
  • sound waves in the low sounds are mainly emitted from the other end 42 of the tube members 4A to 4D.
  • the optimal emission position may be different between the mid-high range and the low range, but the position where the mid-high range sound wave is emitted and the position where the low-range sound wave is emitted are separated, Each of them can be arranged at an optimum position to obtain extremely good acoustic characteristics.
  • the speaker units 2A and 2B and the enclosures 3A and 3B are provided in the instrument panel I, and the pipe members 4A and 4B pass through the instrument panel I, so that the mobile speaker system 1A is provided to the vehicle C. When provided, the appearance can be kept good.
  • the front speaker units 2A and 2B and the rear speaker units 2C and 2D are time-differentiated so that the standing wave nodes are separated rearward from the front head positions H1 and H2.
  • the time difference may be set as appropriate according to the relationship between the position of the node when there is no time difference and the head positions H1 to H5. For example, when there is no time difference, when the node is located in front of the head positions H1, H2, the time difference may be such that the node is further away from the head positions H1, H2 toward the front side of the vehicle C.
  • the time difference may be such that the node is further away from the head positions H3 to H5 toward the front side of the vehicle C.
  • the time difference may be set according to the relationship between the position of the node when there is no time difference and the head position of each row.
  • the front and rear speaker units of the vehicle C are omitted without providing such a time difference. You may operate simultaneously.
  • the position of the node is changed for the standing wave having a frequency substantially equal to the interval between the corners C1 and C2.
  • the position of the node is changed for the standing wave having other frequencies. May be.
  • the standing wave having a wavelength of about 2/3 of the above-mentioned interval two nodes are formed between the corners C1 and C2, and this node is one of the head positions H1 to H5 of each seat.
  • the time difference may be set so that the vehicle C is further away from the front side or the rear side of the vehicle C.
  • the tube member 4C extends from the driver seat side in the width direction toward the passenger seat side, and the tube member 4D is the assistant in the width direction.
  • the pipe member 4C and the pipe member 4D extend from the seat side toward the driver's seat side, the pipe member 4C and the pipe member 4D are arranged in the traveling direction of the vehicle C as shown in FIGS. It is good also as a structure which extends toward back side and the pipe member 4C and the pipe member 4D do not cross
  • the moving body speaker system 1 includes the four speaker devices 10A to 10D provided at the four corners CR1 to CR4 of the vehicle C.
  • the moving body speaker system includes at least What is necessary is just to provide two speaker apparatuses.
  • two speaker devices may be provided at the front and rear corners of the vehicle C in the front-rear direction, or may be provided at the corners on one side and the other side in the width direction, respectively.
  • the cross-sectional shapes and cross-sectional areas of the pipe members 4A to 4D are substantially constant.
  • the pipe member may have a cross-sectional area that is substantially constant and the cross-sectional shape changes. Good.
  • the length of the pipe members 4A and 4B on the front side and the pipe members 4C and 4D on the rear side are substantially equal, these lengths may be different from each other.
  • the enclosure 3 and the pipe member 4 serving as the accommodating portions are separate members, but the enclosure and the pipe member may be integrally formed.
  • the accommodating part is one tubular member, and this tubular member serves as both an enclosure and a tube member.
  • the frequency characteristics of sound waves emitted from the speaker unit may be set appropriately. Even if the sound pressure in the low frequency range radiated from the front side of the speaker unit is high, if the sound pressure of the low frequency sound radiated from the other end by resonating with the tube member is sufficiently high, Even if the sound waves weaken each other, a low sound pressure can be secured.
  • a speaker unit that emits sound waves so that the sound pressure is the same level from the low range to the mid-high range, or the sound pressure of the low range is A speaker unit that emits sound waves may be used so as to be higher than the sound pressure in the mid-high range, or a mid-high range speaker unit (tweeter) may be used.
  • the shape of the speaker unit is not particularly limited, and may be a cone type or a dome shape.
  • sound waves are emitted from the front side of the front speaker units 2A, 2B on the upper surface of the instrument panel I.
  • the speaker unit is, for example, the lower surface (driver's seat and Sound waves may be radiated from the front side of the speaker unit on the opposite surface.
  • the speaker units 2A and 2B are provided in the instrument panel I, the speaker unit may be provided outside the instrument panel I (for example, placed on the upper surface of the instrument panel I). Good. At this time, the pipe member may be provided along the outside without passing through the inside of the instrument panel I. According to such a structure, when installing the speaker system for mobile bodies by retrofit with respect to a vehicle, installation work can be implemented easily.
  • the other end 42 of the pipe members 4A to 4D opens toward the corners C1 and C2 where the three surfaces intersect, but the other end has a plurality of surfaces surrounding the vehicle interior space A1. It may open toward the intersection (R1 to R8 shown in FIG. 3) where two of (the inner surface of the windshield W, the upper surface S1, the lower surface S2, the front surface S3, the pair of side surfaces S4, the rear surface 5) intersect. It does not have to face the intersection. Further, the other end 42 of the rear pipe members 4C, 4D may open toward the corner C3 where the rear surface S5, the upper surface S1, and the side surface S4 of the vehicle C intersect.
  • intersection R1 is an intersection where the front surface S3 and the lower surface S2 of the vehicle C intersect
  • the intersection R2 is an intersection where the lower surface S2 and the side surface S4 of the vehicle C intersect
  • the intersection R3 is The intersection portion R4 intersects the front surface S3 and the side surface S4 of the vehicle C
  • the intersection portion R4 intersects the rear surface S5 of the vehicle C and the lower surface S2
  • the intersection portion R5 is the rear surface S5 of the vehicle C.
  • the intersection R6 is the intersection where the front surface S3 and the upper surface S1 of the vehicle C intersect
  • the intersection R7 intersects the upper surface S1 and the side S4 of the vehicle C.
  • the intersection R8 is an intersection where the rear surface S5 of the vehicle C and the upper surface S1 intersect.
  • the standing wave is formed between the corners C1 and C2 that are opposed not only in the front-rear direction but also in the width direction (that is, obliquely).
  • standing waves may be formed between intersecting portions facing each other only in the front-rear direction.
  • the node may be moved for a standing wave having a wavelength corresponding to the interval between the crossing portions facing in the front-rear direction.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Mechanical Engineering (AREA)
  • Fittings On The Vehicle Exterior For Carrying Loads, And Devices For Holding Or Mounting Articles (AREA)

Abstract

L'invention concerne un système de haut-parleurs qui est destiné à un corps en mouvement et qui rend possible une amélioration des caractéristiques acoustiques. Le système (1) de haut-parleurs pour corps en mouvement est muni de quatre dispositifs (10A)-(10D) de haut-parleurs. En disposant les dispositifs individuels (10A)-(10D) de haut-parleurs dans quatre sections (CR1)-(CR4) d'angles de l'espace intérieur (A1) de véhicule d'un véhicule (C), il est possible d'améliorer la pression acoustique d'un son émis par le système (1) de haut-parleurs pour un corps en mouvement dans son ensemble et d'améliorer des caractéristiques acoustiques même lorsque l'espace vide dans chacune des sections (CR1)-(CR4) d'angles est exigu.
PCT/JP2015/074531 2015-08-28 2015-08-28 Système de haut-parleurs pour corps en mouvement WO2017037806A1 (fr)

Priority Applications (8)

Application Number Priority Date Filing Date Title
PCT/JP2015/074531 WO2017037806A1 (fr) 2015-08-28 2015-08-28 Système de haut-parleurs pour corps en mouvement
JP2017537711A JP6475343B2 (ja) 2015-08-28 2016-08-15 移動体用スピーカシステム
US15/755,398 US20180244212A1 (en) 2015-08-28 2016-08-15 Speaker system for mobile object
EP16841475.3A EP3343944B1 (fr) 2015-08-28 2016-08-15 Système de haut-parleur pour corps mobile
JP2017537712A JP6462885B2 (ja) 2015-08-28 2016-08-15 移動体用スピーカシステム
PCT/JP2016/073857 WO2017038442A1 (fr) 2015-08-28 2016-08-15 Système de haut-parleur destiné à un corps mobile
US15/755,438 US10486614B2 (en) 2015-08-28 2016-08-15 Speaker system for mobile object
PCT/JP2016/073858 WO2017038443A1 (fr) 2015-08-28 2016-08-15 Système de haut-parleur pour corps mobile

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2015/074531 WO2017037806A1 (fr) 2015-08-28 2015-08-28 Système de haut-parleurs pour corps en mouvement

Publications (1)

Publication Number Publication Date
WO2017037806A1 true WO2017037806A1 (fr) 2017-03-09

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2015/074531 WO2017037806A1 (fr) 2015-08-28 2015-08-28 Système de haut-parleurs pour corps en mouvement

Country Status (1)

Country Link
WO (1) WO2017037806A1 (fr)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60173445U (ja) * 1984-04-26 1985-11-16 マツダ株式会社 自動車の音響装置
JPH042754U (fr) * 1990-04-23 1992-01-10
JPH0626400U (ja) * 1990-12-19 1994-04-08 富士通テン株式会社 音場制御装置

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60173445U (ja) * 1984-04-26 1985-11-16 マツダ株式会社 自動車の音響装置
JPH042754U (fr) * 1990-04-23 1992-01-10
JPH0626400U (ja) * 1990-12-19 1994-04-08 富士通テン株式会社 音場制御装置

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