WO2005089013A1 - Haut-parleur - Google Patents

Haut-parleur Download PDF

Info

Publication number
WO2005089013A1
WO2005089013A1 PCT/JP2005/004320 JP2005004320W WO2005089013A1 WO 2005089013 A1 WO2005089013 A1 WO 2005089013A1 JP 2005004320 W JP2005004320 W JP 2005004320W WO 2005089013 A1 WO2005089013 A1 WO 2005089013A1
Authority
WO
WIPO (PCT)
Prior art keywords
speaker
diameter
housing
speaker unit
sound
Prior art date
Application number
PCT/JP2005/004320
Other languages
English (en)
Japanese (ja)
Inventor
Hiroshi China
Original Assignee
Hiroshi China
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 Hiroshi China filed Critical Hiroshi China
Publication of WO2005089013A1 publication Critical patent/WO2005089013A1/fr

Links

Classifications

    • 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
    • H04R1/20—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; DEAF-AID SETS; 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
    • H04R1/2884—Reduction of undesired resonances, i.e. standing waves within enclosure, or of undesired vibrations, i.e. of the enclosure itself by means of the enclosure structure, i.e. strengthening or shape of the enclosure
    • H04R1/2888—Reduction of undesired resonances, i.e. standing waves within enclosure, or of undesired vibrations, i.e. of the enclosure itself by means of the enclosure structure, i.e. strengthening or shape of the enclosure for loudspeaker transducers

Definitions

  • the present invention relates to a speaker having excellent sound quality and high strength in terms of the design of a housing.
  • Speakers have various configurations such as a flat baffle type, a bass reflex type, a closed type, a horn type, and a knock road horn type depending on a combination of a speaker unit and an enclosure.
  • the resonance frequency f is as follows.
  • Patent Document 1 JP 2002-10383 A (Page 1, Page 2, FIG. 1, FIG. 2)
  • Patent Document 2 U.S. Pat.No. 4,628,528 (FIG. 1, FIG. 8)
  • the shape of the speaker is determined to some extent if sound quality is pursued.
  • the housing of the speaker tended to be large.
  • speakers 1 are installed not only in movie theaters and audio rooms, but also in various places such as coffee shops, live band shops, museums, art galleries, open spaces, and living rooms of ordinary households. In many cases, there are restrictions or limitations on the space in which speakers can be installed, and the shape and size of the speaker housing to be installed are often given priority over the sound quality of the speakers.
  • an object of the present invention is to prevent deterioration of characteristics due to sound resonance even when a pipe-type housing is used, and to reduce the installation floor area by using a pipe-type housing. It is an object of the present invention to provide a speaker with a higher degree of freedom in design.
  • the invention of claim 1 attaches a speaker unit having a diameter substantially equal to the cylindrical diameter of the cylindrical housing to one end of the cylindrical housing. This is a speaker that is closed off and provided with a sound absorbing material on the inner surface of the housing.
  • the diameter of the cylindrical housing 1 and the diameter of the speaker unit 2 are too different from each other, so that the sound spreads inside as a spherical wave 3 and the air freely oscillates.
  • the speaker unit 2 with a diameter approximately equal to the cylindrical diameter of the housing 1 is installed outward and sealed, so the air inside the cylindrical housing 1 is forced by the speaker unit 2. Air is lost and there is no escape space, and the load is sufficiently applied.
  • the sound absorbing material provided on the inner surface of the housing eliminates the sound reflected on the inner surface, so that the sound is generated by a plane wave inside the cylindrical housing. As a result, it reaches the end of the cylindrical body, and it is thought that resonance is unlikely to occur by efficiently driving the air.
  • the invention of claim 2 is the speaker according to claim 1, wherein the housing is erected with the speaker side facing upward, and a gap is provided between the lower end of the housing and the housing.
  • the bottom plate is provided in such a manner as to provide an omnidirectional speaker, and a substantially conical reflector is provided at the upper end so that the tip of the cone faces the speaker.
  • the middle sound and the high sound emitted from the front side of the speaker become spherical waves, and the sound is diffused in all directions by the conical reflector provided in front, and the low sound is the sound behind the speaker.
  • the invention according to claim 3 is the speaker according to claim 1 or 2, wherein the speaker unit is provided with an extension extending beyond the edge portion of the cone paper so that the effective straightness of the cone paper is improved. It employs a configuration using speakers with a larger diameter.
  • the periphery of the speaker unit is a frame connected to the enclosure.
  • the boundary between the frame and the vibrating paper (cone paper) is made of a ring-shaped soft material called an edge, which is smaller than the outer diameter of the speaker unit by the size of the edge, which is smaller than that of the speaker unit.
  • the invention according to claim 4 is the speaker according to any one of claims 1 to 3, wherein an enlarged portion having an enlarged diameter is provided at one end of the cylindrical housing. Is adopted as a diameter substantially equal to the diameter of the enlarged portion and attached to the enlarged portion.
  • the cylindrical housing and the cone paper of the speaker unit are similar to the relationship between the cylinder and the piston, and the cylindrical housing has substantially the same cross-sectional area as the cylinder (housing) and the piston (cone). Because the air is forced into the interior without any escape space (piston effect), the length of the tube is free to be affected by the resonance frequency (resonance) determined by the length of the tube. , And even with a small speaker unit, bass sound of sufficient volume, similar to a large-diameter speaker, can be obtained.
  • the casing can be obtained simply by cutting a pipe-shaped material that is relatively easy to obtain, it can be manufactured at a lower cost and easier than an ordinary speaker enclosure. It comes out.
  • an omnidirectional speaker in a tower-type housing can be obtained, so that the speaker has a small installation floor area and a distinctive design, even if the space is small. It can be installed so that it does not visually affect the surrounding environment, or on the contrary, it is decorated and decorated so that it stands out, such as a coffee shop, live band store, museum, museum, open space It can be used in various places where omnidirectional speed is required regardless of the listening position, such as a general home.
  • the air inside the cylindrical housing can be moved more efficiently, and a rich sound volume can be obtained. You will be able to obtain.
  • the speaker unit is attached to the enlarged portion having a diameter larger than the diameter of the cylindrical housing, so that the area of the cone paper of the speaker unit with respect to the diameter of the housing.
  • the pressure can be increased, and the pressure inside the cylindrical housing can be more effectively applied.
  • FIG. 1 is a front sectional view showing an example of the speaker of the present invention.
  • the housing 1 constituting the speaker has a cylindrical shape with an internal cavity, and its height is about 90 cm.
  • the material of the housing 1 is not particularly limited, but it is made of a lightweight and strong material such as a wood resin molding or a metal (aluminum or the like). It is also low in cost.
  • a speaker unit 2 having a diameter of about 8 cm is installed facing upward and sealed.
  • This speaker unit 2 is obtained by shaving the outer peripheral frame of a commercially available speaker unit and, if possible, removing the speaker unit.
  • the dimensional difference between the outer diameter of 2 and the outer diameter of the cone paper should be eliminated.
  • a disk 5 having a diameter substantially equal to the diameter of the housing 1 is provided at the upper end of a column 5 extending vertically upward from several places (for example, four points) around the speaker unit 2 at the upper end of the housing 1.
  • Shaped top plate 6 At the center of the top plate 6, a downwardly substantially conical cone 7 facing the speaker unit 2 is fixed.
  • the cone 7 plays a role as a sound diffuser, and is made of a hard material capable of reflecting sound, and has a size substantially equal to the diameter of the speaker unit 2 and is good. Is approximately 45 °, and the sound emitted upward from the speaker unit 2 is changed in the lateral direction by the slope of the cone 7 and is substantially conical, so the sound is equally distributed in all directions around it. The reflected sound is diffused from the space between the top plate 6 and the speaker unit 2 over a 360 ° circumference in the horizontal direction.
  • a sound absorbing material 8 made of thick (about 7 mm) glass wool or quilt sheets is adhered to the entire inner wall inside the housing 1 to completely prevent standing waves in the housing 1 Like! /
  • a notch is provided in the housing 1 to which the force to which the bottom plate 9 is connected.
  • An opening 10 is formed at the lowermost end of the body 1.
  • the loudspeaker 1 of this embodiment has the above-described configuration, and the middle tone and the treble sound become a spherical wave 3 shown in FIG. 5B from the front of the speaker unit 2, and furthermore, a substantially conical cone 7.
  • the sound is diffused in all directions, and the bass sound is the sound behind the speaker unit 2 as shown in Fig. 5 (B).
  • the height (length) of the housing 1 is set to 90 cm, the force is not only 90 cm (around lm), but also 1.5 m, 3 m, etc. Any length can be used depending on considerations.
  • a significant difference between the speaker of the present invention and a musical instrument utilizing resonance of an acoustic tube is that, in the case of a pipe organ or a flute, because of free vibration, a force at which resonance occurs at a resonance frequency determined by the length of the tube. In the case of, it is not resonance because of the controlled sound drive.
  • f nc / 2L (Hz) (n: positive integer, c: speed of sound, L: length of the pipe)
  • a speaker unit 2 having a diameter of 8 cm is attached.
  • the diameter of the speaker unit 2 is the same regardless of the diameter of the 8 cm, 10 cm, 12 cm, 16 cm, and 20 cm speakers. There is bass.
  • the fO of the speaker unit 2 with a diameter of 8 cm was 140 Hz, and although it could not output 40 Hz, it could be reproduced sufficiently and the bass drum sound could be produced clearly.
  • the level of the bass changes depending on the width of the gap in the vertical direction of the opening 10 which serves as a passage for bass.
  • the force in which the vertical width of the gap in the opening is about 10 mm is obtained.
  • the frequency characteristic B with a small gap of 5 mm has a lower sound pressure level in the low-frequency range, and the gap with a large gap of 30 mm.
  • the frequency characteristic C the sound pressure level in the low range was increased, and the tone of the low range became lighter.
  • FIG. 3A is a front sectional view showing a speaker unit 2 suitable for the speaker of the present invention.
  • the area of the vibrating paper (cone paper 11) is smaller than the diameter of the speaker unit 2.
  • FIG. 3 (B) shows a comparison of the conventional speaker unit 2 when the area of the cone paper 11 is the same.
  • Both the speaker unit 2 of the present invention and the conventional one generate a sound by vibrating the cone paper 11 by the action of the magnet 12 and the coil 13, and the conventional one has the periphery of the cone paper 11, Between the frame 14 (for connection to the housing 1) and a flexible edge portion 15 for connecting to the cabinet 14 without disturbing the vibration of the cone paper 11, a ring is provided. Note that a damper 16 is provided below the cone paper 11 to prevent vibration due to inertia of the cone paper 11.
  • the diameter of the cone paper 11 is reduced to the whole of the speaker unit 2. Although it is smaller than the diameter, in the speaker unit of the present invention, the area of the cone paper 11 can be increased as much as possible with respect to the speaker unit 2 by providing the cone paper 11 with an extension 1 mm beyond the edge 15. did it.
  • the frame paper has a diameter of about 77mm
  • the outer edge part has a diameter of about 68mm
  • the outermost edge of the cone paper has a diameter of about 54mm.
  • 11 is provided with an extension 1 mm so that it overlaps with the edge, so that the diameter of cone paper 11 is about 68 mm, and if it is further extended to the frame, the diameter of cone paper 11 can be about 77 mm. Will be.
  • FIG. 4 shows another embodiment of the speaker of the present invention, in which an enlarged portion 17 having a diameter near the upper end portion of the housing 1 larger than other portions is provided.
  • a speaker unit 2 having a diameter substantially equal to the diameter of the speaker unit 2 is attached to the enlarged portion 17.
  • the area of the cone paper of the speaker unit 2 for driving the air is increased with respect to the diameter of the housing 1, and the effect of the piston for driving the air can be more expected.
  • the enlargement ratio for the other portion of the enlargement portion 17 in the housing 1 is not particularly limited. However, if the enlargement ratio is too large, the amount of air to power the speaker unit is reduced. Since it is too small, the diameter ratio of the enlarged portion 17 to the other portion of the housing 1 may be appropriately determined within a range of 1.2: 1 to 2: 1.
  • FIG. 1 is a front sectional view showing a speaker of the present invention.
  • FIG. 2 is a graph showing frequency characteristics of the speaker of the present invention.
  • FIG. 3 (A) is a front sectional view of a speaker unit used for the speaker of the present invention
  • FIG. 3 (B) is a front sectional view of a conventional speaker unit described for comparison.
  • FIG. 4 is a front sectional view showing another embodiment of the speaker of the present invention.
  • FIG. 5 (A) is an explanatory diagram showing sound propagation of a conventional speaker
  • FIG. 5 (B) is an explanatory diagram showing sound propagation of the present invention.

Abstract

[PROBLÈMES] Fournir un haut-parleur capable d'éviter que ses caractéristiques ne soient détériorées par la résonance à une fréquence spécifiée, déterminée par la longueur d'un tuyau, même si l'on utilise un boîtier de type tuyau, et capable de réduire son encombrement au sol et d'améliorer le degré de liberté de conception en adoptant le boîtier de type tuyau. [MÉTHODE DE RÉSOLUTION DES PROBLÈMES] Dans ce haut-parleur, une unité de haut-parleur (2) d'un diamètre à peu près égal au diamètre cylindrique du boîtier (1) est fixée vers l'extérieur par scellement à une extrémité du boîtier cylindrique (1). Le boîtier (1) est érigé avec l'unité du haut-parleur (2) face vers le haut. Une plaque au sol (9) est installée dans la partie basse du boîtier (1) de sorte qu'un vide (une ouverture (10)) puisse être formé entre la partie basse et le boîtier (1). Un matériau absorbant le son (8) est installé sur la surface interne du boîtier (1).
PCT/JP2005/004320 2004-03-12 2005-03-11 Haut-parleur WO2005089013A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2004070138A JP2005260627A (ja) 2004-03-12 2004-03-12 スピーカー
JP2004-070138 2004-03-12

Publications (1)

Publication Number Publication Date
WO2005089013A1 true WO2005089013A1 (fr) 2005-09-22

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ID=34975994

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2005/004320 WO2005089013A1 (fr) 2004-03-12 2005-03-11 Haut-parleur

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Country Link
JP (1) JP2005260627A (fr)
WO (1) WO2005089013A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2017191981A (ja) * 2016-04-12 2017-10-19 宏尚 佐藤 スピーカ装置

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4870242B1 (ja) * 2011-10-04 2012-02-08 寛 梅田 バスレフ型無指向性スピーカー
JP2016054436A (ja) * 2014-09-04 2016-04-14 株式会社シロクマ スピーカー装置
JP2019080254A (ja) * 2017-10-26 2019-05-23 知名　弘 発光機能付きスピーカー
KR101965339B1 (ko) * 2017-10-31 2019-08-13 주식회사 디아이티랩 음향 기능을 갖는 공명 모듈러 가구

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6072087U (ja) * 1983-10-21 1985-05-21 山水電気株式会社 スピ−カ装置
JPH03128596A (ja) * 1989-09-06 1991-05-31 Kiyouji Onohashi 反転式重ね構造多重筒型スピーカーシステム装置
JPH05176392A (ja) * 1991-12-25 1993-07-13 Matsushita Electric Ind Co Ltd スピーカ
JPH0644291U (ja) * 1992-11-25 1994-06-10 株式会社東芝 重低音スピーカ装置
JPH11136781A (ja) * 1997-10-31 1999-05-21 Victor Co Of Japan Ltd 位相反転形スピーカキャビネット
JP2000023273A (ja) * 1998-06-26 2000-01-21 Nakamichi Corp バスレフ型スピーカ装置
JP2002010383A (ja) * 2000-06-21 2002-01-11 Hiroshi China 全指向性バックロードホーン型スピーカー
JP2002291085A (ja) * 2001-03-28 2002-10-04 Haruhiko Imamura スピーカ装置

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6072087U (ja) * 1983-10-21 1985-05-21 山水電気株式会社 スピ−カ装置
JPH03128596A (ja) * 1989-09-06 1991-05-31 Kiyouji Onohashi 反転式重ね構造多重筒型スピーカーシステム装置
JPH05176392A (ja) * 1991-12-25 1993-07-13 Matsushita Electric Ind Co Ltd スピーカ
JPH0644291U (ja) * 1992-11-25 1994-06-10 株式会社東芝 重低音スピーカ装置
JPH11136781A (ja) * 1997-10-31 1999-05-21 Victor Co Of Japan Ltd 位相反転形スピーカキャビネット
JP2000023273A (ja) * 1998-06-26 2000-01-21 Nakamichi Corp バスレフ型スピーカ装置
JP2002010383A (ja) * 2000-06-21 2002-01-11 Hiroshi China 全指向性バックロードホーン型スピーカー
JP2002291085A (ja) * 2001-03-28 2002-10-04 Haruhiko Imamura スピーカ装置

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2017191981A (ja) * 2016-04-12 2017-10-19 宏尚 佐藤 スピーカ装置

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