WO2008141785A1 - Elektroakustischer schallwandler, hörer und mikrofon - Google Patents
Elektroakustischer schallwandler, hörer und mikrofon Download PDFInfo
- Publication number
- WO2008141785A1 WO2008141785A1 PCT/EP2008/003988 EP2008003988W WO2008141785A1 WO 2008141785 A1 WO2008141785 A1 WO 2008141785A1 EP 2008003988 W EP2008003988 W EP 2008003988W WO 2008141785 A1 WO2008141785 A1 WO 2008141785A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- membrane
- grooves
- bead
- microphone
- receiver
- Prior art date
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
- H04R7/00—Diaphragms for electromechanical transducers; Cones
- H04R7/02—Diaphragms for electromechanical transducers; Cones characterised by the construction
- H04R7/12—Non-planar diaphragms or cones
- H04R7/14—Non-planar diaphragms or cones corrugated, pleated or ribbed
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R7/00—Diaphragms for electromechanical transducers; Cones
- H04R7/16—Mounting or tensioning of diaphragms or cones
Definitions
- Electroacoustic transducer Hand and microphone
- the present invention relates to an electroacoustic transducer, a receiver and a microphone.
- EP 1 615 466 shows an electroacoustic transducer with a bead having a plurality of grooves extending radially.
- No. 2,439,665 shows a loudspeaker diaphragm which has embossments running concentrically to the center of the diaphragm in a region of the outer edge.
- a variety of radially arranged imprints cut the concentric imprints.
- DE 19 10 970 shows an electroacoustic transducer with a diaphragm whose edge region has a multiplicity of folds which form an accordion-like sequence of inclined surfaces.
- US 1, 859, 782 shows a membrane for a loudspeaker. The membrane has a plurality of intersecting concentric circular imprints.
- a dynamic transducer with a membrane, wherein the membrane has a bead. On a first side of the bead, first and second grooves are arranged such that the first and second grooves intersect.
- diamond-shaped protrusions or recesses are formed on the first side of the bead by the intersection of the first and second grooves.
- the first and second grooves have different angles to a first end of the membrane.
- the first and second grooves have different angles to an end of the diaphragm so that the first and second grooves intersect asymmetrically.
- the membrane is configured as a film, wherein the first and second grooves are embossed in the film.
- the invention relates to the idea of providing an electro-acoustic sound transducer system, the system having a membrane with at least one bead. has.
- the bead has a first and second groove, with the first and second grooves (on one side of the membrane) intersect.
- the intersection of the first and second grooving results in diamond-shaped elevations on a bead surface.
- the diamonds are preferably asymmetrical, which can be made possible by different angles of the first and second grooves. By stretching or compressing the grooves, the diamond-shaped structure of the bead could be deformed. Due to the asymmetry of the grooves, a preferred direction of the membrane or the bead can form, whereby the required deformation force can be further reduced.
- a membrane for such a transducer system allows for an automated process and is easier to demould. Furthermore, such a transducer has improved acoustic properties as well as a lower resonant frequency.
- the dynamic transducer described above can be used for example in a dynamic (head) handset or in a dynamic microphone.
- FIG. 1 shows a schematic view of a membrane according to a first embodiment
- Fig. 2 shows a frequency response of a membrane according to the prior art and a membrane according to the first embodiment
- Fig. 1 shows a schematic view of a membrane according to a first embodiment.
- the membrane 10 has an outer end 10a and an inner end 10b and a bead 11 between the outer and inner ends 10a, 10b.
- first and second grooves 20, 30 are provided such that the first and second grooves 20, 30 intersect.
- a membrane with asymmetric cross-grooving on the bead can be obtained.
- diamond-shaped projections or recesses 40 are obtained. Due to the different angles of the first and second creases (with respect to one end 10a, 10b of the membrane), these diamonds are configured asymmetrically.
- the diamond-shaped structure of the bead allows easier deformation when the bead is stretched or compressed.
- FIG. 2 shows a representation of the frequency response of a membrane according to the prior art and of the membrane according to the first exemplary embodiment.
- the membrane according to the prior art has a simple groove, while the membrane according to the first embodiment has a crossed grooving.
- the frequency response M1 of the membrane according to the prior art has modes at 5 kHz in the form of a break-in. Such modes are not present in the frequency response M2 of the membrane according to the first embodiment.
- the resonance frequency of the diaphragm according to the first embodiment is lower than the resonance frequency of the diaphragm according to the prior art, and the frequency response M2 of the diaphragm according to the first embodiment shows a later decrease to lower frequencies.
- Fig. 3 shows an impedance characteristic of a membrane according to the prior art and a membrane according to the first embodiment.
- the impedance characteristic A1 corresponds to the impedance characteristic of a membrane according to the prior art
- the impedance characteristic A2 corresponds to the impedance characteristic of a membrane according to the first embodiment. It thus becomes clear that the resonance frequency of the diaphragm according to the first exemplary embodiment is lower than the resonance frequency of the membrane according to the prior art.
- the membrane according to the first exemplary embodiment can be formed, for example, from a (plastic) film, for example, the plastic film can have a thickness of approximately 6 ⁇ m.
- the dynamic transducer described above can be used for example in a dynamic headphone or in a dynamic microphone.
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Diaphragms For Electromechanical Transducers (AREA)
- Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US12/598,035 US8345916B2 (en) | 2007-05-18 | 2008-05-19 | Electroacoustic sound transducer, receiver and microphone |
CN200880016603A CN101682816A (zh) | 2007-05-18 | 2008-05-19 | 电声的声换能器,耳机和麦克风 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102007023512A DE102007023512A1 (de) | 2007-05-18 | 2007-05-18 | Elektroakustischer Schallwandler |
DE102007023512.9 | 2007-05-18 |
Publications (2)
Publication Number | Publication Date |
---|---|
WO2008141785A1 true WO2008141785A1 (de) | 2008-11-27 |
WO2008141785A4 WO2008141785A4 (de) | 2009-01-22 |
Family
ID=39672776
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP2008/003988 WO2008141785A1 (de) | 2007-05-18 | 2008-05-19 | Elektroakustischer schallwandler, hörer und mikrofon |
Country Status (4)
Country | Link |
---|---|
US (1) | US8345916B2 (de) |
CN (1) | CN101682816A (de) |
DE (1) | DE102007023512A1 (de) |
WO (1) | WO2008141785A1 (de) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DK178943B1 (en) * | 2015-11-03 | 2017-06-19 | Fibona Acoustics Aps | Loudspeaker membrane and low-profile loudspeaker |
US10917725B2 (en) | 2015-11-03 | 2021-02-09 | Fibona Acoustics Aps | Loudspeaker membrane with curved structure paths |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8170254B2 (en) * | 2007-07-02 | 2012-05-01 | Tracy Dennis A | Low profile loudspeaker |
JP5665194B2 (ja) * | 2011-08-19 | 2015-02-04 | 株式会社オーディオテクニカ | 電気音響変換器の振動板およびその製造方法 |
CN105122838B (zh) * | 2013-02-27 | 2018-08-21 | Gp 声学(英国)有限公司 | 电声学隔膜 |
US9253576B2 (en) | 2013-11-21 | 2016-02-02 | Bose Corporation | Suspension for acoustic device |
US9628917B2 (en) | 2014-07-23 | 2017-04-18 | Bose Corporation | Sound producing system |
JP6685624B2 (ja) * | 2017-01-24 | 2020-04-22 | 三菱電機株式会社 | スピーカー |
IT202100017741A1 (it) * | 2021-07-07 | 2023-01-07 | Sica Altoparlanti S R L | Membrana per altoparlante erosa tramite incisione laser per la riduzione delle distorsioni e del beack-up |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1859782A (en) * | 1929-06-11 | 1932-05-24 | Rca Corp | Acoustic diaphragm |
US2439665A (en) * | 1944-01-31 | 1948-04-13 | Rca Corp | Sound reproducing device |
DE4329637A1 (de) * | 1993-09-02 | 1995-03-09 | Sennheiser Electronic | Verfahren zum Herstellen einer profilierten Membran für elektro-akustische Wandler, wie Kopfhörer sowie nach diesem Verfahren hergestellte Wandlermembran |
DE10058274A1 (de) * | 2000-11-23 | 2002-05-29 | Alfa Laval Flow Gmbh | Membran mit strukturierter Oberfläche |
EP1615466A2 (de) * | 2004-07-07 | 2006-01-11 | Tadashi Nagaoka | Akustische Membran |
US20070047757A1 (en) * | 2005-08-26 | 2007-03-01 | Foxconn Technology Co., Ltd. | Diaphragm for micro-electroacoustic device |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB191405038A (en) | 1914-02-26 | 1915-02-25 | Harry Weir Hess | Improvements in Acoustic Instruments. |
US1781387A (en) * | 1926-07-31 | 1930-11-11 | Bell Telephone Labor Inc | Diaphragm |
US2624417A (en) * | 1947-02-20 | 1953-01-06 | Joseph B Brennan | Acoustic diaphragm with flexible rim portion and rigid body portion |
US3563337A (en) * | 1968-03-06 | 1971-02-16 | Hitachi Ltd | Electroacoustic transducer |
JPS5619298A (en) | 1979-07-26 | 1981-02-23 | Sony Corp | Speaker diaphragm |
US4375182A (en) * | 1980-10-31 | 1983-03-01 | Z John R | Ultra-sensitive diaphragm with dual stress-relief structures |
JPS607299A (ja) | 1983-06-27 | 1985-01-16 | Audio Technica Corp | 音響変換器のダイヤフラム |
DE102007023979B4 (de) | 2007-05-23 | 2009-05-07 | Umicore Ag & Co. Kg | Zweistufiges Verfahren zur Reaktivierung thermisch gealterter Stickoxid-Speicherkatalysatoren |
-
2007
- 2007-05-18 DE DE102007023512A patent/DE102007023512A1/de not_active Withdrawn
-
2008
- 2008-05-19 WO PCT/EP2008/003988 patent/WO2008141785A1/de active Application Filing
- 2008-05-19 CN CN200880016603A patent/CN101682816A/zh active Pending
- 2008-05-19 US US12/598,035 patent/US8345916B2/en not_active Expired - Fee Related
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1859782A (en) * | 1929-06-11 | 1932-05-24 | Rca Corp | Acoustic diaphragm |
US2439665A (en) * | 1944-01-31 | 1948-04-13 | Rca Corp | Sound reproducing device |
DE4329637A1 (de) * | 1993-09-02 | 1995-03-09 | Sennheiser Electronic | Verfahren zum Herstellen einer profilierten Membran für elektro-akustische Wandler, wie Kopfhörer sowie nach diesem Verfahren hergestellte Wandlermembran |
DE10058274A1 (de) * | 2000-11-23 | 2002-05-29 | Alfa Laval Flow Gmbh | Membran mit strukturierter Oberfläche |
EP1615466A2 (de) * | 2004-07-07 | 2006-01-11 | Tadashi Nagaoka | Akustische Membran |
US20070047757A1 (en) * | 2005-08-26 | 2007-03-01 | Foxconn Technology Co., Ltd. | Diaphragm for micro-electroacoustic device |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DK178943B1 (en) * | 2015-11-03 | 2017-06-19 | Fibona Acoustics Aps | Loudspeaker membrane and low-profile loudspeaker |
US10917725B2 (en) | 2015-11-03 | 2021-02-09 | Fibona Acoustics Aps | Loudspeaker membrane with curved structure paths |
Also Published As
Publication number | Publication date |
---|---|
WO2008141785A4 (de) | 2009-01-22 |
US8345916B2 (en) | 2013-01-01 |
DE102007023512A1 (de) | 2008-11-20 |
US20100215196A1 (en) | 2010-08-26 |
CN101682816A (zh) | 2010-03-24 |
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