WO2023100674A1 - 音響出力装置 - Google Patents

音響出力装置 Download PDF

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Publication number
WO2023100674A1
WO2023100674A1 PCT/JP2022/042749 JP2022042749W WO2023100674A1 WO 2023100674 A1 WO2023100674 A1 WO 2023100674A1 JP 2022042749 W JP2022042749 W JP 2022042749W WO 2023100674 A1 WO2023100674 A1 WO 2023100674A1
Authority
WO
WIPO (PCT)
Prior art keywords
sound
acoustic
output device
sound output
diaphragm
Prior art date
Legal status (The legal status 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 status listed.)
Ceased
Application number
PCT/JP2022/042749
Other languages
English (en)
French (fr)
Japanese (ja)
Inventor
幸雄 長濱
宏司 三浦
弘之 白川
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sony Group Corp
Original Assignee
Sony Group Corp
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 Sony Group Corp filed Critical Sony Group Corp
Priority to US18/713,413 priority Critical patent/US20250024196A1/en
Priority to CN202280078052.3A priority patent/CN118303035A/zh
Priority to JP2023564874A priority patent/JPWO2023100674A1/ja
Publication of WO2023100674A1 publication Critical patent/WO2023100674A1/ja
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
    • H04R1/00—Details of transducers, loudspeakers or microphones
    • H04R1/20—Arrangements for obtaining desired frequency or directional characteristics
    • H04R1/22—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired frequency characteristic only 
    • H04R1/26—Spatial arrangements of separate transducers responsive to two or more frequency ranges
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; 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; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
    • H04R1/00—Details of transducers, loudspeakers or microphones
    • H04R1/02—Casings; Cabinets ; Supports therefor; Mountings therein
    • H04R1/023—Screens for loudspeakers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
    • H04R1/00—Details of transducers, loudspeakers or microphones
    • H04R1/20—Arrangements for obtaining desired frequency or directional characteristics
    • H04R1/22—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired frequency characteristic only 
    • H04R1/28—Transducer mountings or enclosures modified by provision of mechanical or acoustic impedances, e.g. resonator, damping means
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
    • H04R1/00—Details of transducers, loudspeakers or microphones
    • H04R1/20—Arrangements for obtaining desired frequency or directional characteristics
    • H04R1/22—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired frequency characteristic only 
    • H04R1/28—Transducer mountings or enclosures modified by provision of mechanical or acoustic impedances, e.g. resonator, damping means
    • H04R1/2869—Reduction of undesired resonances, i.e. standing waves within enclosure, or of undesired vibrations, i.e. of the enclosure itself
    • H04R1/2876—Reduction of undesired resonances, i.e. standing waves within enclosure, or of undesired vibrations, i.e. of the enclosure itself by means of damping material, e.g. as cladding
    • H04R1/288—Reduction of undesired resonances, i.e. standing waves within enclosure, or of undesired vibrations, i.e. of the enclosure itself by means of damping material, e.g. as cladding for loudspeaker transducers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
    • H04R1/00—Details of transducers, loudspeakers or microphones
    • H04R1/20—Arrangements for obtaining desired frequency or directional characteristics
    • H04R1/22—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired frequency characteristic only 
    • H04R1/30—Combinations of transducers with horns, e.g. with mechanical matching means, i.e. front-loaded horns
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
    • H04R1/00—Details of transducers, loudspeakers or microphones
    • H04R1/20—Arrangements for obtaining desired frequency or directional characteristics
    • H04R1/32—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only
    • H04R1/34—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only by using a single transducer with sound reflecting, diffracting, directing or guiding means
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
    • H04R1/00—Details of transducers, loudspeakers or microphones
    • H04R1/20—Arrangements for obtaining desired frequency or directional characteristics
    • H04R1/32—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only
    • H04R1/34—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only by using a single transducer with sound reflecting, diffracting, directing or guiding means
    • H04R1/345—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only by using a single transducer with sound reflecting, diffracting, directing or guiding means for loudspeakers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
    • H04R1/00—Details of transducers, loudspeakers or microphones
    • H04R1/02—Casings; Cabinets ; Supports therefor; Mountings therein
    • H04R1/025—Arrangements for fixing loudspeaker transducers, e.g. in a box, furniture

Definitions

  • This technology relates to the technical field of sound output devices equipped with speaker units that output sound.
  • the portion near the opening which is the sound output portion, is made uneven to form reinforcing ribs, and the reinforcing ribs suppress the occurrence of mechanical vibrations, thereby stabilizing the sound.
  • the configuration is such that the acoustic characteristics are ensured.
  • the objective of the sound output device of this technology is to widen the directivity while ensuring a wide band of sound output from the speaker unit.
  • a sound output device includes a speaker unit that has a diaphragm and outputs sound in a full-range frequency band, and a sound control body that has a sound guide through which the sound output from the speaker unit passes, An opening portion of the sound guide portion on the speaker unit side is provided as an acoustic input portion, and an opening portion of the sound guide portion opposite to the acoustic input portion is provided as an acoustic output portion, and the acoustic output portion extends in the width direction. It is formed in a shape having a length direction, and the width of the acoustic output portion is made smaller than the width of the diaphragm.
  • the width of the sound output section is made smaller than the width of the diaphragm, and the sound is output from the elongated sound output section.
  • FIGS. 2 to 9 An embodiment of the sound output device of the present technology is shown together with FIGS. 2 to 9, and this figure is a perspective view showing the sound output device.
  • 1 is an exploded perspective view of a sound output device; FIG. It is a horizontal sectional view of an acoustic output device. 1 is a vertical sectional view of an acoustic output device; FIG. FIG. 4 is a perspective view of an acoustic control body; FIG. 4 is a front view showing the acoustic control body, the speaker unit, and the base plate; It is a sectional view showing a concave space. It is a front view which shows an acoustic resonance circuit typically. It is a front view which shows a sound pipe typically.
  • the sound output device 1 can be placed on a mounting surface (not shown) such as a table or the top surface of the floor in either a vertically long state or a horizontally long state. It is
  • the sound output device 1 has, for example, two speaker units positioned one above the other when placed vertically, and outputs sound as a monaural type when placed vertically, and as a stereo type when placed horizontally. sound is output in the manner of use.
  • the front, back, top, bottom, left, and right directions are the directions when the sound output device 1 is placed vertically.
  • the front, rear, up, down, left, and right directions shown below are for convenience of explanation, and implementation of the present technology is not limited to these directions.
  • the sound output device 1 has a vertically long housing 2 and required parts supported or arranged in the housing 2 (see FIGS. 1 and 2).
  • the housing 2 has a substantially semi-cylindrical base portion 3 and proximal end portions 4, 4 which are continuously provided at both upper and lower ends of the base portion 3 (see FIG. 2).
  • the base portion 3 is formed with a vertically long rectangular cover hole 3a that opens forward.
  • the base end portion 4 has a substantially circular outer shape, and has a communication hole 4 a that communicates with the space inside the base portion 3 .
  • the base end portion 4 is provided with a projecting portion 4b having a front end positioned forwardly of the base portion 3, and a communication hole 4a is formed in a portion on the rear side of the projecting portion 4b.
  • Approximately disk-shaped passive radiators 5, 5 are attached to the base ends 4, 4 of the housing 2 from above and below, respectively, and the communication holes 4a, 4a are closed by the passive radiators 5, 5, respectively.
  • the passive radiator 5 amplifies and reinforces low-frequency sound, enabling the output of powerful deep bass sound.
  • Covers 6, 6 are attached to the base ends 4, 4 of the housing 2 from above and below.
  • the cover 6 is attached to the base end portion 4 in a state of covering the passive radiator 5 and has a shallow recess opening toward the passive radiator 5 side.
  • the cover 6 is formed with a plurality of acoustic holes 6a.
  • a base plate 7 is attached to the housing 2 so as to cover the covering hole 3a.
  • the base plate 7 is formed in a vertically elongated substantially rectangular shape, and is provided with arrangement holes 7a, 7a separated vertically (see FIGS. 3 and 4).
  • Speaker units 8, 8 are attached to the base plate 7 in a state of being vertically aligned.
  • the sound output from the speaker unit 8 is full-range sound, and the frequency band of the speaker unit 8 is set from 50 Hz to 20 KHz, for example.
  • the number of speaker units 8 provided in the sound output device 1 is arbitrary, and one speaker unit 8 or three or more speaker units 8 may be provided.
  • the speaker unit 8 has a drive section 9 having a magnet, a yoke, etc., and a diaphragm 10 that vibrates due to the drive force of the drive section 9 .
  • the vibrating plate 10 is provided with a vibrating portion 10a except for the portion on the outer peripheral side, and a portion positioned outside the vibrating portion 10a is provided as a mounted portion 10b.
  • the vibrating portion 10a is formed, for example, in a curved shape such as a circular shape, an elliptical shape, or an oval shape when viewed in the front-rear direction.
  • the attached portion 10b of the diaphragm 10 is attached to the base plate 7 from the front side, and the driving portion 9 is inserted into the placement hole 7a so that the portion of the driving portion 9 excluding a part thereof is positioned behind the base plate 7. be done.
  • a sound control body 11 is attached to the base plate 7 (see FIGS. 2 to 4).
  • the acoustic control body 11 includes tubular (square tubular) sound guide portions 12, 12 penetrating in the front and rear direction, and a plurality of mounting protrusions 13 projecting outward from the rear end portions of the sound guide portions 12, 12. It has a plurality of control fins 14 provided inside the sound guide portions 12, 12, respectively, and functional protrusions 15, 15, ... projecting from the sound guide portions 12, 12, respectively (Fig. to FIG. 6).
  • the sound guide part 12 is formed in a vertically long shape, and the opening on the rear side is provided as an acoustic input part 16 and the opening on the front side is provided as an acoustic output part 17 .
  • the acoustic input portion 16 has an inner shape that is one size larger than the outer shape of the vibrating portion 10a of the diaphragm 10, and the acoustic output portion 17 is formed in a vertically long, substantially rectangular shape.
  • the size of the acoustic input section 16 is larger than the size of the acoustic output section 17, for example.
  • the sound guide portion 12 has left and right side portions 18 , 18 that are inclined toward each other as it goes from the sound input portion 16 toward the sound output portion 17 , and the width in the left-right direction increases as it goes from the sound input portion 16 toward the sound output portion 17 . It is gradually made smaller (see FIG. 3). Therefore, the width H1 of the sound output portion 17 in the sound guide portion 12 is smaller than the width H2 of the diaphragm 10, particularly the width of the vibrating portion 10a.
  • the upper surface portion 19 and the lower surface portion 20 of the sound guide portion 12 are inclined so as to recede from each other from the sound input portion 16 toward the sound output portion 17, and the length in the vertical direction is from the sound input portion 16 to the sound output portion. 17 is gradually lengthened (see FIG. 4). Therefore, the length L1 of the sound output portion 17 in the sound guide portion 12 is made larger than the length L2 of the diaphragm 10, particularly the length of the vibrating portion 10a.
  • the sound guide portion 12 is inclined so that the side portions 18, 18 approach each other as it goes from the acoustic input portion 16 to the acoustic output portion 17, and the upper surface portion 19 and the lower surface portion 20 are inclined from the acoustic input portion 16 to the acoustic output portion. Since the sound output portions 17 are inclined so as to recede from each other toward 17, the sound output portion 17 is formed in a vertically long shape and is formed in a slit shape as a whole.
  • the shape of the sound output portion 17 is arbitrary as long as it is vertically long.
  • it may be formed in an elliptical shape or a super-elliptical shape in addition to a rectangular shape, and the peripheral edge is formed only by a linear portion.
  • a shape in which a straight portion and a curved portion are continuously formed on the peripheral edge may be used.
  • the inner peripheral surface of the sound guide portion 12 is formed in a shape in which two or more curved surfaces with different curvatures are continuous in the front-rear direction, which is the traveling direction of sound (sound waves) (see FIG. 3).
  • the inner surface of the side portion 18 is formed by two or more curved surfaces having different curvatures at the front end and other portions, and the portion other than the front end is formed as a first curved surface 18a with a small curvature.
  • the front end is formed as a second curved surface 18b having a larger curvature than the first curved surface 18a.
  • the first curved surface 18a is, for example, a gently curved surface that is concave outward in the left-right direction and has a curvature of R1
  • the second curved surface 18b is, for example, a curved surface that is convex outward in the left-right direction. and has a curvature R2 larger than the curvature R1.
  • the inner peripheral surface of the sound guide portion 12 is composed of two curved surfaces having different curvatures. It may be composed of three or more continuous curved surfaces.
  • control fins 14 are provided vertically apart from each other inside the sound guide section 12 (see FIGS. 3 to 6).
  • the control fins 14 , 14 have their rear ends positioned slightly forward of the rear end of the sound guide portion 12 , and front ends positioned slightly forward of the front end of the sound guide portion 12 . , and are oriented so as not to hinder the progress of the sound output from the speaker unit 8 (see FIG. 4).
  • the control fins 14 are therefore inclined with respect to the central axis M of the diaphragm 10 .
  • the left and right ends of the control fin 14 are continuous with the inner surfaces of the side portions 18, 18, respectively (see FIGS. 3 and 4).
  • the upper control fins 14 are spaced downward from the top surface 19 , and the control fins 14 at the bottom are spaced upward from the bottom surface 20 .
  • the upper control fins 14 are gently curved to project upward, and the lower control fins 14 are gently curved to project downward. By gently curving the control fins 14, 14 in this way, the rigidity of the control fins 14, 14 is increased.
  • control fins 14 provided in the sound output device 1 is arbitrary, and one or more than three control fins 14 may be provided for one sound guide section 12 .
  • the portions between the control fins 14, 14 are formed as uneven surfaces 18c, 18c in which a plurality of unevennesses are continuous except for some.
  • the uneven surface 18c is formed on a portion of the side surface portion 18 other than the front end portion.
  • the uneven surface 18c is formed on a portion other than the front end portion of the side portion 18, high rigidity of the front end portion of the side portion 18 is maintained.
  • the entire inner surface of the side portion 18 between the control fins 14, 14 may be formed as the uneven surface 18c.
  • the direction in which the unevenness of the uneven surface 18 c is aligned is the direction that connects the acoustic input section 16 and the acoustic output section 17 .
  • the direction in which the unevenness of the uneven surface 18 c is aligned may be a direction other than the direction connecting the acoustic input section 16 and the acoustic output section 17 .
  • the functional protrusions 15, 15 protrude from the rear end of the sound guide section 12 in directions separated from each other in the left-right direction (see FIGS. 3, 5 and 6).
  • the functional protrusion 15 protrudes, for example, from the central portion of the sound guide portion 12 in the vertical direction.
  • the functional protrusion 15 is formed, for example, in a substantially triangular shape whose vertical width narrows as it goes outward in the left-right direction.
  • the functional protrusion 15 is opened toward the sound guide portion 12, and the internal space is formed as a substantially triangular recessed space 15a (see FIGS. 3 and 7).
  • the functional protrusion 15 may have a function as the attached protrusion 13 .
  • the recessed space 15a may be formed at any position around the passage of the sound output from the speaker unit 8. Alternatively, it may be formed between the acoustic input section 16 and the acoustic output section 17 .
  • the shape of the recessed space 15a is arbitrary, it is desirable that the wall surfaces forming the recessed spaces 15a, 15a are not facing each other. It is desirable that there are no wall surfaces facing left and right.
  • the concave space 15a may be formed in a semicircular shape, a semielliptical shape, or the like.
  • the attached projections 13, 13, When the acoustic control body 11 is attached to the base plate 7, the acoustic input portion 16 is positioned on the outer peripheral side of the vibrating portion 10a of the diaphragm 10 (see FIG. 3). Accordingly, the functional projections 15, 15 are positioned near the outer periphery of the vibrating portion 10a.
  • the front panel 21 is attached to the base plate 7 from the front side of the acoustic control body 11 (see FIGS. 1 and 2).
  • the front panel 21 has a guard portion 22 which is formed in a mesh shape and has a substantially rectangular outer shape, side portions 23 projecting from both left and right ends of the guard portion 22, and both left and right ends of the side portions 23 and 23. . . projecting outward in the left-right direction.
  • the outer shape of the guard portion 22 is formed to have substantially the same size and the same shape as the outer shape of the sound output portion 17 in the sound guide portion 12 .
  • the guard portion 22 has the same size and shape as the sound output portion 17 of the sound control body 11. For example, when the sound output portion 17 is rectangular, the guard portion 22 has the same shape as the sound output portion 17 When the sound output portion 17 is elliptical, the guard portion 22 is also formed in an elliptical shape having the same size as the sound output portion 17 .
  • the side portions 23 , 23 protrude obliquely rearward from the guard portion 22 .
  • the front panel 21 has, for example, the mounting piece portions 24, 24, . . . . . are attached to the base plate 7 by screwing or the like by tightening together.
  • the guard portion 22 covers the sound guide portion 12 from the front side (see FIGS. 3 and 4).
  • the cover panel 25 is attached to the housing 2 .
  • the cover panel 25 has a body portion 26 that covers the entirety of the housing 2 from the side portion to the rear portion, and inclined portions 27, 27 that are continuous with the left and right front edges of the body portion 26, respectively.
  • the inclined portion 27 is inclined such that the inner end in the left-right direction is positioned forward of the outer end, and the outer surface is formed as an inclined surface 27a.
  • the inclined surface 27a faces obliquely forward and laterally.
  • a vertically long space (gap) is formed between the inclined portions 27 , 27 in the cover panel 25 , and this space serves as a sound emission hole 28 .
  • the width of the sound emission hole 28 in the horizontal direction is substantially the same as the width of the guard portion 22 in the horizontal direction of the front panel 21, and the length in the vertical direction is substantially the same as the length of the guard portion 22 in the vertical direction. .
  • the side portions 23, 23 of the front panel 21 and the attached piece portions 24, 24, . . . . Therefore, when the cover panel 25 is attached to the housing 2 , the guard portion 22 of the front panel 21 is positioned in the sound emission hole 28 . Also, the inclined surfaces 27a, 27a are displaced from the sound input portion 16 side of the sound control body 11 toward the sound output portion 17 side as they approach the sound emission hole 28 in the left-right direction (width direction).
  • the sound output device 1 configured as described above, when sounds are output from the speaker units 8, 8 respectively, the output sounds pass through the sound guide portions 12, 12 of the sound control body 11, respectively. The sound is emitted outside through the sound emission hole 28 through the guard portion 22 . At this time, the speaker unit 8 outputs, for example, a full-range sound with a frequency band of 50 Hz to 20 KHz, and the passive radiators 5, 5 amplify and reinforce low-frequency sounds.
  • the sound output device 1 includes the speaker unit 8 having the diaphragm 10 and outputting sound in the full-range frequency band, and the sound guide section 12 through which the sound output from the speaker unit 8 passes. and the width H1 of the acoustic output portion 17 is made smaller than the width H2 of the diaphragm 10 .
  • the width H1 of the sound output portion 17 is made smaller than the width H2 of the diaphragm 10, and the narrow sound output portion 17 Sound is output.
  • the width H1 of the sound output portion 17 is made smaller than the width H2 of the diaphragm 10, and the narrow sound output portion 17 Sound is output.
  • the sound output part 17 in an elongated shape and forming a slit as a whole, it is possible to convert the output sound into a line sound source. wide directivity can be achieved.
  • the width of the sound guide portion 12 is reduced from the acoustic input portion 16 toward the acoustic output portion 17 .
  • the sound output from the speaker unit 8 passes through the sound guide portion 12 whose width decreases as it approaches the sound output portion 17 from the sound input portion 16, the sound is converted into a line sound source as it moves toward the sound output portion 17. This makes it possible to further widen the directivity of the sound.
  • a cover panel 25 having a sound emission hole 28 positioned corresponding to the sound output section 17 is provided, and a portion of the outer surface of the cover panel 25 is positioned toward the sound input section 16 as it approaches the sound emission hole 28 in the width direction. are formed as inclined surfaces 27a, 27a that are displaced toward the sound output portion 17 side.
  • the sound output from the sound output portion 17 through the sound emission hole 28 is likely to spread in the width direction of the sound emission hole 28, it is possible to further widen the directivity of the sound, and the sound pressure frequency characteristic is improved. can be stabilized.
  • control fins 14 for controlling the sound traveling from the sound input section 16 to the sound output section 17 are provided inside the sound guide section 12, the control fins 14 suppress the occurrence of specific acoustic resonance, thereby improving the sound quality. can be improved.
  • control fins 14 are inclined with respect to the central axis M of the diaphragm 10, the progress of sound output from the speaker unit 8 is less likely to be hindered by the control fins 14, thereby ensuring a stable sound output state. can do.
  • the sound control body 11 is formed with the recessed space 15a located on the outer peripheral side of the diaphragm 10, sound absorption occurs in the recessed space 15a, and the occurrence of specific acoustic resonance is suppressed, thereby improving the sound quality. be able to.
  • the inner peripheral surface of the sound guide portion 12 is formed into a shape in which a first curved surface 18a and a second curved surface 18b having different curvatures are continuous in the sound traveling direction.
  • the internal space of the sound guide portion 12 can be maximized while the inner surface shape of the sound guide portion 12 is formed in a shape that does not hinder the progress of sound, thereby suppressing the occurrence of specific acoustic resonance. Sound quality can be improved.
  • the uneven surface 18c suppresses the occurrence of specific acoustic resonance, thereby improving the sound quality. can be achieved.
  • An acoustic resonance circuit 29 may be formed in the acoustic output device 1 (see FIG. 8).
  • the acoustic resonance circuit 29 is formed in the acoustic control body 11, for example, and is formed as an internal space of a portion protruding from the rear end portion of the sound guide portion 12 similarly to the functional protrusion 15, and is formed as a first space having a small volume. It is composed of a space 29a and a second space 29b having a volume larger than that of the first space 29a.
  • the first space 29a is located on the side of the diaphragm 10 and is open to the side of the diaphragm, and the second space 29b communicates with the first space 29a and extends on the opposite side of the diaphragm 10 across the first space 29a. formed.
  • Such an acoustic resonance circuit 29 is called a Helmholtz resonance circuit, and has a function of suppressing an unnecessary increase in sound pressure caused by the occurrence of acoustic resonance of the sound output from the speaker unit 8 .
  • a plurality of acoustic resonance circuits 29 are formed, for example, around the diaphragm 10, and two each are formed above and below the recessed spaces 15a, 15a.
  • the number of acoustic resonance circuits 29 formed is arbitrary and may be a number other than four.
  • the position where the acoustic resonance circuit 29 is formed is arbitrary as long as it exhibits a sound absorbing effect for the sound output from the speaker unit 8 .
  • the acoustic resonance circuit 29 formed by the first space 29a and the second space 29b located on the outer peripheral side of the diaphragm 10 is formed in the acoustic control body 11, whereby the first space 29a and the second space 29b are formed. Since an acoustic resonance circuit is formed by the second space 29b, an unnecessary increase in sound pressure due to acoustic resonance is suppressed, and sound quality can be improved.
  • a sound absorbing material (not shown) may be arranged in at least one of the first space 29a and the second space 29b.
  • the sound-absorbing effect is generated by the sound-absorbing material, so that the occurrence of specific acoustic resonance is further suppressed, and the sound quality can be further improved.
  • the sound absorbing material may be arranged in the concave space 15a in addition to at least one of the first space 29a and the second space 29b, or may be arranged in the first space 29a and the second space 29b. Alternatively, it may be arranged only in the concave space 15a.
  • the acoustic resonance circuit formed in the sound output device 1 is not limited to the Helmholtz resonance circuit, and an acoustic tube, for example, may be used as the acoustic resonance circuit.
  • the acoustic resonance circuit including the acoustic resonance circuit 29 formed in the sound output device 1 may be formed at any position around the passage of the sound output from the speaker unit 8. For example, it may be formed not only on the sound input section 16 side but also on the sound output section 17 side or between the sound input section 16 and the sound output section 17 .
  • a sound conduit 30 may be formed instead of the acoustic resonance circuit 29 (see FIG. 9).
  • the length and number of the sound conduits 30 are arbitrary, and the sound conduits 30 may be formed, for example, one, or a plurality of them may be formed in the circumferential direction of the diaphragm 10 . Further, the position where the sound conduit 30 is formed is also arbitrary as long as it is a position where the sound output from the speaker unit 8 can be effectively absorbed.
  • Such a sound conduit 30 has a function of suppressing an unnecessary increase in sound pressure due to the occurrence of acoustic resonance of the sound output from the speaker unit 8. Therefore, by forming the sound conduit 30, an unnecessary increase in sound pressure due to acoustic resonance is suppressed, and the sound quality can be improved.
  • a sound absorbing material (not shown) may be arranged in the sound conduit 30 .
  • the sound-absorbing effect is generated by the sound-absorbing material, so that the occurrence of specific acoustic resonance is further suppressed, and the sound quality can be further improved.
  • the sound conduit 30 may be formed at any position around the portion through which the sound output from the speaker unit 8 passes. It may be formed not only on the side but also on the side of the sound output section 17 or between the sound input section 16 and the sound output section 17 .
  • the present technology can be configured as follows.
  • a speaker unit having a diaphragm and outputting sound in a full-range frequency band; a sound control body having a sound guide through which sound output from the speaker unit passes; an opening on the speaker unit side of the sound guide portion is provided as an acoustic input portion, and an opening portion of the sound guide portion opposite to the acoustic input portion is provided as an acoustic output portion;
  • the acoustic output part is formed in a shape having a width direction and a length direction, An acoustic output device, wherein the width of the acoustic output section is smaller than the width of the diaphragm.
  • a cover panel having an acoustic emission hole positioned corresponding to the acoustic output portion and having a shape having a width direction and a length direction; (1) or (2), wherein at least part of the outer surface of the cover panel is formed as an inclined surface that displaces from the sound input section side toward the sound output section side as it approaches the sound emission hole in the width direction.
  • a first space and a second space positioned on the outer peripheral side of the diaphragm are continuously formed in the acoustic control body,
  • the sound output device according to any one of (1) to (8), wherein the first space has a volume smaller than that of the second space and is formed at a position close to the diaphragm.
  • sound output device 8 speaker unit 10 diaphragm 11 sound control body 12 sound guide portion 14 control fin 15a recessed space 16 sound input portion 17 sound output portion 18a first curved surface 18b second curved surface 18c uneven surface 25 cover panel 27a inclined Surface 28 Sound emission hole 29a First space 29b Second space

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Health & Medical Sciences (AREA)
  • Otolaryngology (AREA)
  • Obtaining Desirable Characteristics In Audible-Bandwidth Transducers (AREA)
PCT/JP2022/042749 2021-12-02 2022-11-17 音響出力装置 Ceased WO2023100674A1 (ja)

Priority Applications (3)

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US18/713,413 US20250024196A1 (en) 2021-12-02 2022-11-17 Sound output device
CN202280078052.3A CN118303035A (zh) 2021-12-02 2022-11-17 声音输出设备
JP2023564874A JPWO2023100674A1 (https=) 2021-12-02 2022-11-17

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JP2021196376 2021-12-02
JP2021-196376 2021-12-02

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JP (1) JPWO2023100674A1 (https=)
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Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5450535U (https=) * 1977-09-16 1979-04-07
JPH03192899A (ja) * 1989-12-21 1991-08-22 Matsushita Electric Ind Co Ltd 車載用スピーカ装置
JPH0580093U (ja) * 1992-03-31 1993-10-29 日本ビクター株式会社 スピーカシステム
JPH06121387A (ja) * 1992-10-06 1994-04-28 Toshiba Corp スピーカシステム
JPH06319095A (ja) * 1993-03-08 1994-11-15 Hitachi Ltd テレビジョン受像機
JPH07245796A (ja) * 1994-03-04 1995-09-19 Mitsubishi Electric Corp スピーカーシステム
JPH1066182A (ja) * 1996-08-21 1998-03-06 Matsushita Electric Ind Co Ltd スピーカ装置
JPH10174188A (ja) * 1996-12-12 1998-06-26 Matsushita Electric Ind Co Ltd スピーカ装置
JP2000165974A (ja) * 1998-11-24 2000-06-16 Matsushita Electric Ind Co Ltd スピーカ装置
US20050265570A1 (en) * 2004-04-30 2005-12-01 Mika Isotalo Method to generate a plane acoustic wave front, a plane wave channel, a loudspeaker construction and a linear loudspeaker array
JP2010136248A (ja) * 2008-12-08 2010-06-17 Onkyo Corp スピーカー用ホーンおよびこれを用いたホーンスピーカー
US20180054671A1 (en) * 2016-08-22 2018-02-22 Harman International Industries, Inc. Compression driver and phasing plug assembly therefor

Patent Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5450535U (https=) * 1977-09-16 1979-04-07
JPH03192899A (ja) * 1989-12-21 1991-08-22 Matsushita Electric Ind Co Ltd 車載用スピーカ装置
JPH0580093U (ja) * 1992-03-31 1993-10-29 日本ビクター株式会社 スピーカシステム
JPH06121387A (ja) * 1992-10-06 1994-04-28 Toshiba Corp スピーカシステム
JPH06319095A (ja) * 1993-03-08 1994-11-15 Hitachi Ltd テレビジョン受像機
JPH07245796A (ja) * 1994-03-04 1995-09-19 Mitsubishi Electric Corp スピーカーシステム
JPH1066182A (ja) * 1996-08-21 1998-03-06 Matsushita Electric Ind Co Ltd スピーカ装置
JPH10174188A (ja) * 1996-12-12 1998-06-26 Matsushita Electric Ind Co Ltd スピーカ装置
JP2000165974A (ja) * 1998-11-24 2000-06-16 Matsushita Electric Ind Co Ltd スピーカ装置
US20050265570A1 (en) * 2004-04-30 2005-12-01 Mika Isotalo Method to generate a plane acoustic wave front, a plane wave channel, a loudspeaker construction and a linear loudspeaker array
JP2010136248A (ja) * 2008-12-08 2010-06-17 Onkyo Corp スピーカー用ホーンおよびこれを用いたホーンスピーカー
US20180054671A1 (en) * 2016-08-22 2018-02-22 Harman International Industries, Inc. Compression driver and phasing plug assembly therefor

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US20250024196A1 (en) 2025-01-16
JPWO2023100674A1 (https=) 2023-06-08
CN118303035A (zh) 2024-07-05

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