WO2005015945A1 - スピーカグリル - Google Patents
スピーカグリル Download PDFInfo
- Publication number
- WO2005015945A1 WO2005015945A1 PCT/JP2004/011632 JP2004011632W WO2005015945A1 WO 2005015945 A1 WO2005015945 A1 WO 2005015945A1 JP 2004011632 W JP2004011632 W JP 2004011632W WO 2005015945 A1 WO2005015945 A1 WO 2005015945A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- speaker
- sound
- diaphragm
- sound hole
- grill according
- Prior art date
Links
- 230000002093 peripheral effect Effects 0.000 claims abstract description 21
- 230000003014 reinforcing effect Effects 0.000 claims description 9
- 238000010586 diagram Methods 0.000 description 18
- BGPVFRJUHWVFKM-UHFFFAOYSA-N N1=C2C=CC=CC2=[N+]([O-])C1(CC1)CCC21N=C1C=CC=CC1=[N+]2[O-] Chemical compound N1=C2C=CC=CC2=[N+]([O-])C1(CC1)CCC21N=C1C=CC=CC1=[N+]2[O-] BGPVFRJUHWVFKM-UHFFFAOYSA-N 0.000 description 4
- 230000015556 catabolic process Effects 0.000 description 3
- 238000006731 degradation reaction Methods 0.000 description 3
- 230000000903 blocking effect Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000004907 flux Effects 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 239000004642 Polyimide Substances 0.000 description 1
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 229920001721 polyimide Polymers 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
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
- H04R1/02—Casings; Cabinets ; Supports therefor; Mountings therein
- H04R1/023—Screens for loudspeakers
Definitions
- the present invention relates to a speaker grille for a speaker attached to a cabinet or the like.
- the speaker grille is designed to have an aperture ratio that does not impair the sound quality while maintaining the strength to protect the speakers.
- the spout force grille used for speakers with a small diaphragm area has various devices to maintain strength without closing the top of the diaphragm as much as possible.
- the conventional speaker grill 91 disclosed in Japanese Patent Application Laid-Open No. 2003/3783 shown in FIG. 27 is provided on the front of the speaker 92 and has a nonuniform aperture ratio sound. It has holes 9 3.
- the speaker grille requires a relatively high aperture ratio so as not to disturb the vibration of the speaker, and mainly has a sound hole in a portion facing the center of the diaphragm with a high sound pressure level.
- the area of the sound hole surface is required to be 60% or more in order to suppress 5 kHz or more to the characteristics of approximately 6 dB.
- the smaller the speaker the higher the aperture area of the aperture area.
- Figure 28 shows the acoustic characteristics when the aperture area is reduced to 28%.
- the characteristic with the speaker grille indicated by the broken line 96 is lower in sound pressure level near 5 kHz and 10 kHz compared with the characteristic 95 before the speaker grille indicated by the solid line.
- the sound pressure level is high around 3 kHz by resonance.
- the sound hole design of the speaker grill greatly affects the acoustic characteristics of the attached speaker.
- the speaker grill according to the present invention has a diaphragm and is disposed in front of a speaker that reproduces a sound of 1 kHz or more.
- the speaker grill includes a line facing an area from the edge portion of the diaphragm of the speaker to the outer peripheral fixing portion of the diaphragm. This speaker grill has excellent acoustic characteristics and is also excellent in strength.
- FIG. 1A is a perspective view of a speaker grill and a speaker to be combined therewith according to Embodiment 1 of the present invention.
- FIG. 1B is a cross-sectional view of an essential part of the speaker of FIG. 1A.
- FIG. 1C is a cross-sectional view of another loudspeaker in combination with the loudspeaker grille of FIG. 1A.
- FIG. 2 is an acoustic characteristic diagram when the speaker grille and the speaker of FIG. 1A are combined.
- Fig. 3 is an acoustic characteristic diagram when the speaker grille provided with a sound hole at the center is combined with the speaker of Fig. 1A.
- Fig. 4 is an acoustic characteristic diagram when the longitudinal direction of the loudspeaker in Fig. 1A is cut in half.
- Fig. 5 is an acoustic characteristic diagram when the short diameter direction of the speaker in Fig. 1A is cut in half. '
- FIG. 6 is an acoustic characteristic diagram when the speaker grill of FIG. 1A is combined with the speaker.
- FIG. 10 shows the speaker grille according to the second embodiment of the present invention and it It is a perspective view with the speaker to combine.
- Fig. 1 1 is an acoustic characteristic diagram when the speaker grill of Fig. 10 is combined with the speaker.
- Fig. 12 is an acoustic characteristic diagram when the speaker grille provided with a sound hole at the center is combined with the speaker of Fig. 10.
- FIG. 13 is a perspective view of a speaker grill and a speaker combined therewith according to a third embodiment of the present invention.
- Fig. 14 is an acoustic characteristic diagram when the longitudinal direction of the loudspeaker in Fig. 13 is cut in half.
- Fig.15 is an acoustic characteristic diagram when the short diameter direction of the speaker in Fig.13 is cut in half.
- FIG. 16 is an acoustic characteristic diagram when the speaker grill of FIG. 13 is combined with the speaker force.
- Figures 17 to 19 are acoustic characteristic diagrams when the aperture ratio is changed in the speaker grill of Figure 13.
- FIG. 20 is a block diagram of another speaker grille according to Embodiment 3 of the present invention.
- FIG. 23 is an acoustic characteristic diagram when the speaker grill of FIG. 20 and the speaker of FIG. 13 are combined.
- Fig. 24 is an acoustic characteristic diagram when the speaker grill of Fig. 21 and the speaker of Fig. 13 are combined.
- FIG. 25 is an acoustic characteristic diagram when the speaker grill of FIG. 22 and the speaker of FIG. 13 are combined.
- FIG. 26 is a cross-sectional view of the combination of the speaker of FIG. 13 and any of the speaker grills of FIGS.
- Figure 27 is a block diagram of a conventional speaker grille.
- Figure 28 is an acoustic characteristic diagram when the aperture area is reduced in the conventional configuration.
- FIG. 1A is a perspective view of a speaker grill and a speaker to be combined therewith according to Embodiment 1 of the present invention.
- FIG. 1B is a cross-sectional view of the spin of FIG. 1A.
- the speaker 1 has a diaphragm 6 that forms an elliptical vibration surface with a major axis of 12 cm and a minor axis of 8 cm.
- the periphery of diaphragm 6 is fixed to frame 7 and gasket 100.
- the speaker grille 3 is disposed in front of the speaker 1 and fixed to the frame 7 to cover the diaphragm 6.
- the speaker grille 3 is manufactured by cutting or molding a resin such as acrylic or a metal such as aluminum. The thickness is about 0.1 to 10 m m.
- the speaker grille 3 may be formed integrally with a housing of an acoustic product such as a television or radio, so it may be formed by cutting wood, and the material is not particularly limited.
- the speaker grille 3 has sound holes 2 separated by reinforcing ribs 5 for securing the strength of the entire speaker grille 3.
- Each sound hole 2 includes a line 8 opposed to a region from the edge portion 4 A of the diaphragm 6 to the outer peripheral fixing portion 4 of the diaphragm 6.
- the sound hole 2 has an arc-shaped curved portion 9 parallel to the outer peripheral fixing portion 4 of the diaphragm 6.
- the opening of the sound hole 2 may include such a non-specified line.
- the outer peripheral fixing portion 4 of the diaphragm 6 means the inner peripheral line of the gasket 100 provided on the outside of the edge portion 4A. As shown in Figure 1 C In the case of a speaker without a pocket, it means the inner circumference of frame 7 outside edge 4A. In any case, the outer periphery fixing portion 4 means the outermost periphery of the portion vibrating on the vibration surface when the speaker 1 generates a sound. However, it is preferable that the sound hole 2 includes a line facing the outer peripheral surface 4 B of the edge portion 4 A because the main part that vibrates is inside the outer peripheral surface of the edge portion 4 A.
- FIG. 2 shows the acoustic characteristics when the speaker grill 3 and the speaker 1 configured in this way are combined.
- FIG. 3 shows an acoustic characteristic in the case where a speaker grille and a speaker 1 in which a round hole having the same area as the sound hole 2 is aligned with the center of the diaphragm 6 instead of the sound hole 2 are combined.
- the characteristics 1 1 before attaching the speaker grille and the characteristics 1 2 and 1 3 with the speaker grille attached.
- characteristic 13 resonance phenomena occur near 1 to 2 kHz and 4 kHz, and the harmonic response is degraded due to the reaction.
- the aperture ratio is the effective aperture area formed by the sound hole 2 with respect to the projection area by the diaphragm 6.
- the effective opening area is the area of the sound hole 2 itself. It is.
- the opposing portion of the outer peripheral fixing portion 4 is included in the sound hole 2
- the effective opening area is the area of the sound hole 2
- the portion blocked by the gasket 100 or the frame 7 is It is the reduced area.
- the characteristic 1 6 of Fig. 6 shows the acoustic characteristics when the speaker grille 3 of the shape shown in Fig. 1A is combined with the speed 1 with the same aperture ratio.
- a resonance phenomenon has occurred. This is because, as described above, the portion blocked by the opposite surface of the wedge portion 4A is large.
- the characteristic 16 has less resonance and is better than the characteristics 14 and 15.
- Figures 7 and 8 show the characteristics 1 7 when the width 2 A is 5 mm and the characteristics 1 8 when the width 2 A is 10 m.
- the characteristic 1 9 when the width 2 A is 15 mm is equivalent to the characteristic 1 6 shown in Fig. 6, and a characteristic of about 1 3 d B in a band of 1 kHz or more It has been suppressed to decline.
- the aperture ratio is 31%. That is, the aperture ratio is preferably 31% or more. In terms of the strength of the speaker grille 3, the aperture ratio is preferably less than 60%.
- FIG. 10 is a perspective view of the speaker grille according to the second embodiment of the present invention and a speaker combined therewith.
- the speaker 1 has a diaphragm 6 that forms a circular vibrating surface with a diameter of 8 cm.
- the other respects are the same as in the first embodiment.
- FIG. 12 shows the acoustic characteristics in the case of combining the speaker grille and the speaker 1 in which a round hole having the same area as the sound hole 2 is aligned with the center of the diaphragm 6 instead of the sound hole 2.
- characteristic 2 2 around l to 2 k H z The resonance phenomenon occurs near the and 5 kHz, and the harmonic response is degraded by the reaction.
- characteristic 2 has significantly improved these characteristic variations.
- the aperture ratio in this case is preferably 31% or more and less than 60% as in the first embodiment.
- FIG. 13 is a perspective view of a speaker grill and a speaker combined therewith according to a third embodiment of the present invention.
- the speaker 1 has a long side 7 3 m m and a short side 1 7 m m, and has a diaphragm 6 forming an oblong vibration surface.
- the diaphragm 6 is made of a resin film such as polyimide, and its periphery is fixed to the frame 7.
- the speaker grille 3 is disposed on the front of the speaker 1 and fixed to the frame 7 to cover the diaphragm 6.
- the speaker grille 3 has reinforcing ribs 5 for securing the strength of the entire speaker grille 3 and sound holes 2 separated by a blocking portion 5A for blocking the central portion of the vibrating surface.
- the closed portion 5 A protects the central portion of the diaphragm 6.
- Each sound hole 2 includes a line 8 opposed to a region from the edge portion 4 A of the diaphragm 6 to the outer peripheral fixing portion 4 of the diaphragm 6.
- the sound holes 2 at both ends have arc-like curved portions 9 parallel to the outer peripheral fixing portion 4 of the diaphragm 6. As described above, by forming the sound hole 2 by having the curved portion 9 along the outer peripheral fixing portion 4, the sound hole 2 is provided in the portion facing the edge portion 4 A as much as possible.
- the acoustic characteristics of the combination of the speaker grill 3 and the speaker 1 configured in this way are shown in FIG.
- the aperture ratio to the vibration cross-sectional area is set to 47%.
- the acoustic characteristics for the case of half interception of the long side direction of the speed force 1 and the half interception of the short side direction with the same aperture ratio are the characteristics of Fig. 14 4 and the characteristics of Fig. 15 respectively. Shown in 2 5. In each figure, do not install the speaker grille 3 Sound characteristics are shown.
- the characteristic 24 a resonance phenomenon occurs. This is because, as described above, the portion blocked by the facing surface of the edge portion 4A is large.
- the resonance phenomenon is suppressed. It is considered that the resonance is suppressed in the characteristic 25 because the speaker 1 itself is smaller than those in the first and second embodiments.
- the characteristic 2 6 has a profile close to the characteristic 2 3 compared to the characteristic 2 5 and is more preferable.
- Figures 17 and 18 show the characteristics 2 7 when the width 2 A is 2 mm and the characteristics 2 8 when the width 2 A is 3 mm, respectively.
- Characteristic 2.6 shown in Fig. 16 is the case where width 2 A is 4 mm, and it is equivalent to characteristic 29 shown in Fig. 19 when width 2 A is 5 mm, 1 k H In the band of z or more, the characteristic degradation is suppressed to about 3 d B.
- the aperture ratio is 47% as described above. That is, the aperture ratio is preferably 4 7% or more. From the viewpoint of the strength of the speaker grille 3, the aperture ratio is preferably less than 60%.
- the sound hole 2 is provided only in the portion facing the edge 4 A, and the reinforcing rib 5 B extends in the long side direction of the vibration plane so as to divide the two sound holes 2 in the short side direction of the vibration plane.
- FIG. 21 and 22 show a speaker grill 3 having, in addition to the configuration of FIG. 20, a plurality of reinforcing ribs 5 provided to further divide each of the two sound holes in the direction of the short side of the vibrating surface. . That is, ribs 5B having a width of about 6 mm in the vertical direction are arranged in the lateral direction by centering. Furthermore, in Fig.21, the sound holes 2 with a width of about 14 mm and the left and right equally spaced at the center The ribs 5 with a width of about 2 mm are alternately arranged vertically up to about 50 mm in width. In Fig.
- the sound holes 2 with a width of about 4 mm and the ribs with a width of about 4 mm are alternately arranged in the center and distributed in the center.
- the aperture ratio is 48%, 28% and 22% respectively.
- the acoustic characteristics when these speaker grills 3 are combined with the speaker 1 shown in Fig. 13 are shown in Fig. 23, Fig. 24 and Fig. 25 respectively.
- the characteristic shown by the solid line is the characteristic 31 before the speaker net is attached, and the broken line shows the characteristics 3 3, 3 4 and 3 5 after the speaker net is attached.
- the configuration corresponding to Fig. 24 has an aperture ratio of 28% with respect to the speaker aperture area, and although it is inferior to the characteristic 33, the characteristic degradation is about 13 dB in a band of 8 kHz or more. It is suppressed.
- the configuration corresponding to Fig. 25 has an aperture ratio of 22% with respect to the speaker aperture area, so it is inferior to the characteristic 33, but the characteristic degradation is suppressed to about 16 dB in the band of 5 kHz or more. It is done.
- the speed force 1 has a flat voice coil 4 2 on the diaphragm 6 at a position opposite to the magnet 4 1.
- the magnet 43 can be provided on the closed portion 5A or the rib 5B. Furthermore, the magnetic flux of the magnet 4 3 may be concentrated by the yoke 4 4.
- Magnets 4 3 are placed opposite to magnet 4 1 and their magnetic poles are arranged so as to mutually reciprocate. By this configuration, the direction of the generated magnetic flux becomes horizontal and is orthogonal to the direction of the current flowing through the coil 4 2. This increases the magnetic efficiency.
- the sound hole 2 is described as a shape surrounded by an arc-shaped curve or a straight line, but the shape of the sound hole 2 is limited to this. I will not. It may be formed in the area inside the line 8 including the line 8 opposed to the area from the edge portion 4 A of the speaker 1 to the outer peripheral fixing portion 4 of the diaphragm 6.
- the present invention is not limited to this.
- the sound hole 2 may be provided including a line facing the inner circumferential surface of the edge portion 4A and inside the line. Even in this case, the effects of the present invention can be achieved to some extent. In particular, in the case of a speaker having a large aperture, it is possible to secure acoustic characteristics even when a sound hole is provided inside the inner peripheral surface of the edge portion 4A.
- the acoustic characteristics significantly decrease due to the absence of the sound hole 2 in front of the edge 4 A, so at least the line corresponding to 3 mm inside from the outer peripheral surface of the edge 4 A It is better to provide a sound hole 2 at a position that includes the If it is about 3 mm, it is possible to obtain the same effect as that described in the embodiment of the present invention.
- the speaker grill according to the present invention has a diaphragm and is disposed in front of a speaker that reproduces a sound of 1 kHz or more.
- This speaker grill includes a line facing the area from the edge of the diaphragm of the speaker to the outer peripheral fixing part of the diaphragm, and has sound holes only in the area inside this line.
- This speaker grill is useful as a sound hole of an acoustic product having a speaker.
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Details Of Audible-Bandwidth Transducers (AREA)
- Diaphragms For Electromechanical Transducers (AREA)
Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2005513020A JP4086071B2 (ja) | 2003-08-07 | 2004-08-06 | スピーカグリル |
EP04771607A EP1523215B1 (en) | 2003-08-07 | 2004-08-06 | Speaker grille |
US10/524,593 US7266211B2 (en) | 2003-08-07 | 2004-08-06 | Speaker grill |
CN2004800212160A CN1826834B (zh) | 2003-08-07 | 2004-08-06 | 扬声器音孔板 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2003-288717 | 2003-08-07 | ||
JP2003288717 | 2003-08-07 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2005015945A1 true WO2005015945A1 (ja) | 2005-02-17 |
Family
ID=34131525
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2004/011632 WO2005015945A1 (ja) | 2003-08-07 | 2004-08-06 | スピーカグリル |
Country Status (5)
Country | Link |
---|---|
US (1) | US7266211B2 (ja) |
EP (1) | EP1523215B1 (ja) |
JP (1) | JP4086071B2 (ja) |
CN (1) | CN1826834B (ja) |
WO (1) | WO2005015945A1 (ja) |
Families Citing this family (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7543681B2 (en) * | 2005-01-14 | 2009-06-09 | Audio Technologies, Inc. | Architectural speaker assembly |
CN104717586B (zh) | 2008-08-14 | 2019-06-11 | 哈曼国际工业有限公司 | 用于直接辐射式扩音器的相位插件和声透镜 |
NL2004781C2 (nl) * | 2010-05-31 | 2011-12-01 | Alcons Audio Bv | Luidspreker. |
US20120121924A1 (en) * | 2010-11-17 | 2012-05-17 | Oakwood Metal Fabricating Company | Speaker cover |
US9716942B2 (en) | 2015-12-22 | 2017-07-25 | Bose Corporation | Mitigating effects of cavity resonance in speakers |
US9712911B2 (en) | 2015-12-22 | 2017-07-18 | Bose Corporation | Conformable adaptors for diffraction slots in speakers |
CN110049901B (zh) | 2016-10-28 | 2022-09-06 | 伯斯有限公司 | 具有声学通道的靠背扬声器 |
US10194245B1 (en) * | 2017-07-28 | 2019-01-29 | Bose Corporation | Acoustic transducer with vibration damping |
WO2019236867A1 (en) * | 2018-06-08 | 2019-12-12 | Bose Corporation | Headrests |
US10911875B2 (en) * | 2018-08-30 | 2021-02-02 | Apple Inc. | Electro-acoustic transducer diaphragm with integrated structural features, and related systems and methods |
US11590869B2 (en) | 2021-05-28 | 2023-02-28 | Bose Corporation | Seatback speakers |
EP4158907A1 (en) | 2020-06-01 | 2023-04-05 | Bose Corporation | Backrest speakers |
DE102021127864A1 (de) | 2021-10-26 | 2023-04-27 | Karsten Atmani, bürgerlicher Name Buß | Lautsprecher |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5081132A (ja) * | 1973-11-16 | 1975-07-01 | ||
JPS59166584U (ja) * | 1983-04-20 | 1984-11-08 | 株式会社東芝 | スピ−カ装置 |
JPS6037989U (ja) * | 1983-08-23 | 1985-03-15 | オンキヨー株式会社 | ド−ム型スピ−カ− |
JPS61107288U (ja) * | 1984-12-18 | 1986-07-08 | ||
JPS63183782U (ja) * | 1987-05-19 | 1988-11-25 | ||
JP2003037883A (ja) * | 2001-07-26 | 2003-02-07 | Matsushita Electric Ind Co Ltd | スピーカグリル |
Family Cites Families (17)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US103453A (en) * | 1870-05-24 | Improvement in soda-fountain | ||
BE386404A (ja) * | 1931-02-12 | |||
US3716671A (en) * | 1971-05-17 | 1973-02-13 | Motorola Inc | Speaker housing |
US3952834A (en) * | 1973-10-18 | 1976-04-27 | Pioneer Electronic Corporation | Embedded type speaker with over lying grill |
US3909530A (en) * | 1974-01-07 | 1975-09-30 | Federal Sign And Signal Corp | Loudspeaker with shallow re-entrant grille-like horn |
JPS59166584A (ja) | 1983-03-11 | 1984-09-19 | Hitachi Ltd | 「けい」光体 |
US4554250A (en) | 1983-06-30 | 1985-11-19 | E. R. Squibb & Sons, Inc. | Method of increased production of penicillin acylase and plasmid employed therein |
JPS61107288A (ja) | 1984-10-30 | 1986-05-26 | セイコーインスツルメンツ株式会社 | 画像メモリシステム |
JPS61198402A (ja) * | 1985-02-27 | 1986-09-02 | Ozen Corp | 録音内容に応じた複数の外部出力軸を有する簡易音響再生機 |
JPH0790388B2 (ja) | 1987-01-27 | 1995-10-04 | 日本電装株式会社 | 抵抗溶接の良否判定方法及び装置 |
US5133428A (en) * | 1991-04-04 | 1992-07-28 | Perrson John K | Direction-adjustable speaker system |
US5619585A (en) * | 1994-07-14 | 1997-04-08 | Grasso; Mark A. | Means for affixing an ornamental sculpture to a sound emitting device |
US5565659A (en) * | 1995-02-27 | 1996-10-15 | Oakwood Metal Fabricating Company | Speaker cover grille |
JP3136959B2 (ja) * | 1995-08-31 | 2001-02-19 | 松下電器産業株式会社 | スピーカ |
JP3634143B2 (ja) * | 1998-03-31 | 2005-03-30 | 三菱電機株式会社 | スピーカ装置及びその防水カバー |
FR2827731B1 (fr) * | 2001-07-23 | 2004-01-23 | Nexo | Haut-parleur a radiation directe et rayonnement optimise |
JP3471775B2 (ja) * | 2001-08-27 | 2003-12-02 | ヤマハメタニクス株式会社 | マイクホルダ |
-
2004
- 2004-08-06 EP EP04771607A patent/EP1523215B1/en not_active Expired - Fee Related
- 2004-08-06 US US10/524,593 patent/US7266211B2/en not_active Expired - Fee Related
- 2004-08-06 WO PCT/JP2004/011632 patent/WO2005015945A1/ja active Application Filing
- 2004-08-06 CN CN2004800212160A patent/CN1826834B/zh not_active Expired - Fee Related
- 2004-08-06 JP JP2005513020A patent/JP4086071B2/ja not_active Expired - Fee Related
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5081132A (ja) * | 1973-11-16 | 1975-07-01 | ||
JPS59166584U (ja) * | 1983-04-20 | 1984-11-08 | 株式会社東芝 | スピ−カ装置 |
JPS6037989U (ja) * | 1983-08-23 | 1985-03-15 | オンキヨー株式会社 | ド−ム型スピ−カ− |
JPS61107288U (ja) * | 1984-12-18 | 1986-07-08 | ||
JPS63183782U (ja) * | 1987-05-19 | 1988-11-25 | ||
JP2003037883A (ja) * | 2001-07-26 | 2003-02-07 | Matsushita Electric Ind Co Ltd | スピーカグリル |
Also Published As
Publication number | Publication date |
---|---|
JP4086071B2 (ja) | 2008-05-14 |
EP1523215A1 (en) | 2005-04-13 |
JPWO2005015945A1 (ja) | 2006-10-12 |
CN1826834A (zh) | 2006-08-30 |
CN1826834B (zh) | 2010-12-22 |
US20050286735A1 (en) | 2005-12-29 |
EP1523215B1 (en) | 2011-12-21 |
EP1523215A4 (en) | 2010-01-13 |
US7266211B2 (en) | 2007-09-04 |
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