EP2700247A1 - Device for emitting an acoustic wave - Google Patents
Device for emitting an acoustic waveInfo
- Publication number
- EP2700247A1 EP2700247A1 EP12724668.4A EP12724668A EP2700247A1 EP 2700247 A1 EP2700247 A1 EP 2700247A1 EP 12724668 A EP12724668 A EP 12724668A EP 2700247 A1 EP2700247 A1 EP 2700247A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- section
- coupler
- emitting device
- emitting
- mpa
- 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.)
- Granted
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
-
- 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
- H04R1/32—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only
- H04R1/40—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only by combining a number of identical transducers
- H04R1/403—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only by combining a number of identical transducers loud-speakers
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R2201/00—Details of transducers, loudspeakers or microphones covered by H04R1/00 but not provided for in any of its subgroups
- H04R2201/40—Details of arrangements for obtaining desired directional characteristic by combining a number of identical transducers covered by H04R1/40 but not provided for in any of its subgroups
- H04R2201/401—2D or 3D arrays of transducers
-
- 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
- H04R7/04—Plane diaphragms
- H04R7/06—Plane diaphragms comprising a plurality of sections or layers
- H04R7/10—Plane diaphragms comprising a plurality of sections or layers comprising superposed layers in contact
-
- 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
- H04R7/122—Non-planar diaphragms or cones comprising a plurality of sections or layers
- H04R7/125—Non-planar diaphragms or cones comprising a plurality of sections or layers comprising a plurality of superposed layers in contact
-
- 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
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
- H04R9/02—Details
- H04R9/04—Construction, mounting, or centering of coil
- H04R9/046—Construction
Definitions
- the invention relates to a device for transmitting an acoustic wave, such as a loudspeaker.
- Acoustic wave emission devices are commonly used comprising a flared structural part (or salad bowl) which carries at its base an electromechanical transducer (including for example a coil) and which defines at its flared end an outlet surface.
- a flared structural part or salad bowl
- an electromechanical transducer including for example a coil
- a diaphragm connected to the transducer is then generally suspended mounted within the structural part (i.e., on the same side of the exit surface as the transducer).
- the membrane is vibrated by the transducer and thus emits an acoustic wave (in this case through the exit surface).
- US patent application 2009/149116 has proposed a design according to which a radiating diaphragm is mounted at the end of a cylindrical coil body. This design does not include the flared structural part (or salad bowl) conventionally used, as underlined by the patent application.
- the invention proposes a device for transmitting an acoustic wave comprising a flared structural part carrying at its base an electromechanical transducer and defining at its flared end an exit surface, characterized by a mechano-acoustic coupler made in one piece and presenting:
- the coupler is also a solid piece.
- Such a device makes it possible to use a conventional flared structural part, of salad bowl type, and to juxtapose several emission devices to form a continuous emission surface (thanks to the surface section greater than the exit surface).
- the coupler may also have an emitting surface at the third section.
- This emitting surface is for example flat or cylindrical.
- the juxtaposition of planar or cylindrical emissive surface devices makes it possible to easily obtain a continuous emission surface (formed by the joining of the emitting surfaces of the devices), plane or cylindrical, respectively.
- Other forms of emissive surface are also conceivable, such as for example a spherical emissive surface.
- End portions of the third section opposite the second section are free, for example, and can thus be vibrated by the transducer.
- the coupler has for example a homogeneous density in its volume.
- the third section has a density different from the density of the second section.
- the second section has for example a symmetry of revolution.
- the second section could be symmetrical with respect to each of two planes substantially parallel to the emission axis of the device (the axis in which the first, second and third sections succeed each other).
- the second section may not have symmetry.
- the coupler has for example a density of less than 110 kg. m “3 (and / or greater than 32 kg. m “ 3 ), is typically between 32 kg. m “3 and 110 kg. m” 3.
- the drive of the coupler (by the transducer) is thus possible in good conditions despite its volume greater than that of a membrane.
- the coupler is for example made of at least one material having a Young's modulus greater than 36 MPa and / or less than 160 MPa, ie typically between 36 MPa and 160 MPa.
- the coupler is for example made of at least one material having a shear modulus greater than 13 MPa and / or less than 50 MPa, ie typically between 13 MPa and 50 MPa.
- the coupler is for example made of at least one material having a Poisson's ratio greater than 0.2 and / or less than 0.3, which is typically between 0.2 and 0.3.
- the coupler is for example made of at least one waterproof material.
- the coupler When the coupler is suspended on the structural part at the second section by means of a first suspension, the coupler can also be suspended on the structural part by means of a second suspension distinct from the first suspension. This second suspension can be done through another element such as the coil holder.
- FIG. 1 shows a sectional view of a speaker according to a first embodiment of the invention
- FIG. 2 represents a perspective view of the loudspeaker of FIG. 1;
- FIG. 3 represents a sectional view of a loudspeaker according to a second embodiment
- FIG. 4 presents a perspective view of the loudspeaker of FIG.
- FIG. 5 represents a first possibility of juxtaposing a plurality of loudspeakers each conforming to FIGS. 3 and 4;
- FIG. 6 shows a possibility of juxtaposition of a plurality of loudspeakers each conforming to Figures 1 and 2;
- FIG. 7 represents a second possibility of juxtaposition of a plurality of loudspeakers each conforming to FIGS. 3 and 4.
- the loudspeaker shown in FIGS. 1 and 2 comprises a flared structural part or salad bowl 2, of generally cylindrical shape of revolution about an axis X of the loudspeaker (which corresponds as explained below to the main direction of the loudspeaker). emission of acoustic waves by the loudspeaker).
- the salad bowl thus has a base 22, which corresponds to the end of the salad bowl 2 along the X axis at which the salad bowl 2 has the smallest space in section perpendicular to the X axis.
- the salad bowl 2 has, at its flared end 24 opposite the base 22 along the axis X, an outlet surface S (for example planar) whose surface (always in section perpendicular to the axis X) is therefore greater than the sectional area of the base 22.
- an outlet surface S for example planar
- an electromechanical transducer 3 which comprises a first piece of soft iron 32, a second piece of soft iron 34 and a magnet 33. These three elements are fixed relative to each other and relative to the salad bowl 2.
- the electromechanical transducer also comprises a coil body 36 on which a coil 38 is mounted.
- the first piece of soft iron 32 comprises a first cylindrical portion of size (in section perpendicular to the X axis) identical to the bulk of the magnet 33 and the second piece of soft iron 34.
- the magnet 33 and the second piece of soft iron 34 are made in annular form around the axis X.
- the first piece of soft iron 32 also comprises a second portion having a cross-sectional area (perpendicular to the X axis) smaller than that of the first part; the second part is received inside the annular magnet 33 and the second annular piece 34.
- the internal diameter of the annular pieces 33, 34 is greater than the external diameter of the second part of the first piece 32, this makes it possible to provide an annular space where the coil 38 carried by the coil support 36 is received.
- the coil body 36 here has the shape of a straight cylinder and carries, at the end (along the X axis) of the cylinder opposite the end bearing the coil 36, a mechano-acoustic coupler 4 here formed of a full piece in ROHACELL.
- the coupler 4 has three sections which extend successively along the axis X:
- a first section 41 here produced in the form of a right cylinder with an outside diameter identical to the inside diameter of the coil support 36 in order to allow the coupling 4 to be mounted on the coil support 36;
- a second section 42 which extends from the first section 41 and up to the level of the exit surface S of the salad bowl 2; - a third section 43 which extends from the second section 42 (at the outlet surface S) to an emitting surface 45, flat and generally rectangular in the present embodiment.
- the three sections are made of the same homogeneous material as indicated above and the coupler therefore has a homogeneous density in its volume.
- each section is made of a specific material.
- the coupler 4 is suspended on the salad bowl 2 at its second section 42 by means of a first suspension 51.
- This first suspension 51 is produced here in the form of an annular elastic piece (around the X axis) mounted in the example of Figure 1 between the flared end 24 of the salad bowl 2 and the second section 42 of the coupler 4.
- the coupler 4 is however not connected (either by a suspension or a rigid attachment) to the structure of the speaker at its third section 43.
- the end regions of the emitting surface 45 (which extend here over the entire circumference of the emitting surface 45), that is to say the end portions of the third section 43 located opposite the second section 42, are free. These end regions are therefore vibrated by the transducer.
- the assembly formed by the coil body 36 and the coupler 4 is also suspended from the bowl 2 at the coil body 36 by means of two annular suspensions (or “spiders"). "in the English terminology) 52, 53.
- the second section 42 has a symmetry of revolution about the X axis.
- Other forms are however possible.
- the third section 43 extends from the second section 42 (that is to say from the exit surface S) to the emitting surface 45.
- the emitting surface 45 has a sectional area at least equal to the maximum space in section of the salad bowl, and therefore greater than the outlet surface S.
- the sectional area of the third section 43 goes from a value lower than the exit surface S (at this exit surface where the coupler 4 is still received inside the salad bowl 2) to a value greater than the exit surface S (especially at the level of the emitting surface 45 as just indicated). This is possible because the third section 43 extends outside (towards the front) of the salad bowl, that is to say opposite the transducer 3 with respect to the exit surface.
- the loudspeakers may be arranged in such a way that their respective emitting surfaces are contiguous and thus together define a continuous acoustic emission surface, here flat, as shown for example in Figure 5.
- Figures 3 and 4 show a second embodiment of the invention.
- the loudspeaker of FIGS. 3 and 4 comprises elements similar to those of the loudspeaker of FIGS. 1 and 2 and it is therefore not necessary to describe these elements again in detail.
- the loudspeaker of FIGS. 3 and 4 is distinguished from that of FIGS. 1 and 2 by the shape of its emitting surface 145: the third section 143 of the coupler 4 has an emitting surface 145 in the form of a straight cylinder portion of FIG. Y axis perpendicular to the X axis of the speaker.
- the emitting surface 145 also has a cross section perpendicular to the axis X a rectangular general shape and its end regions are free.
- the emitting surface presented by the third section of the coupler is spherical and thus makes it possible to obtain, by the juxtaposition of several emitting surfaces of different loudspeakers, a continuous and spherical emission surface.
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Health & Medical Sciences (AREA)
- Otolaryngology (AREA)
- Multimedia (AREA)
- Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
- Diaphragms For Electromechanical Transducers (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR1153405A FR2974476A1 (en) | 2011-04-20 | 2011-04-20 | DEVICE FOR EMITTING AN ACOUSTIC WAVE |
PCT/FR2012/050824 WO2012143657A1 (en) | 2011-04-20 | 2012-04-13 | Device for emitting an acoustic wave |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2700247A1 true EP2700247A1 (en) | 2014-02-26 |
EP2700247B1 EP2700247B1 (en) | 2018-10-31 |
Family
ID=46197593
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP12724668.4A Active EP2700247B1 (en) | 2011-04-20 | 2012-04-13 | Device for emitting an acoustic wave |
Country Status (5)
Country | Link |
---|---|
US (1) | US9544693B2 (en) |
EP (1) | EP2700247B1 (en) |
JP (1) | JP6014118B2 (en) |
FR (1) | FR2974476A1 (en) |
WO (1) | WO2012143657A1 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN108966095B (en) * | 2018-08-07 | 2024-06-18 | 张永春 | Speaker unit and speaker device |
Family Cites Families (20)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5379525A (en) * | 1976-12-23 | 1978-07-14 | Sony Corp | Compound diaphtagm for speakers |
JPS5418722A (en) | 1977-07-13 | 1979-02-13 | Pioneer Electronic Corp | Plane acoustic transducer |
JPS5511680A (en) * | 1978-07-12 | 1980-01-26 | Matsushita Electric Ind Co Ltd | Diaphragm unit for speaker |
US4239090A (en) * | 1979-03-29 | 1980-12-16 | Dahlquist Jon G | High accuracy bass reproducer device |
JPS5653896U (en) * | 1979-10-02 | 1981-05-12 | ||
GB2062408B (en) * | 1979-10-02 | 1984-02-22 | Victor Company Of Japan | Speaker |
JPS5653896A (en) | 1979-10-03 | 1981-05-13 | Nippon Steel Corp | Covered electrode for low hydrogen arc welding |
JPS56123197A (en) * | 1980-03-05 | 1981-09-28 | Victor Co Of Japan Ltd | Speaker diaphragm |
NL8200690A (en) * | 1982-02-22 | 1983-09-16 | Philips Nv | SPEAKER MEMBRANE CONTAINING A LAYER OF POLYMETHACRYLIMIDE FOAM. |
JPS60223400A (en) | 1984-04-20 | 1985-11-07 | Sanyo Electric Co Ltd | Flat type speaker |
JPS60186794U (en) * | 1984-05-18 | 1985-12-11 | 三洋電機株式会社 | flat speaker |
JPS61103395A (en) | 1984-10-26 | 1986-05-21 | Sony Corp | Flat plate speaker |
US4620606A (en) | 1985-06-03 | 1986-11-04 | Sharp Kabushiki Kaisha | Loudspeaker of plane diaphragm type |
US6449376B1 (en) * | 1999-09-20 | 2002-09-10 | Boston Acoustics, Inc. | Planar-type loudspeaker with at least two diaphragms |
GB2365655A (en) * | 2000-08-02 | 2002-02-20 | Fane Acoustics Ltd | Loudspeaker with an additional flat diaphragm connected to cone diaphragm |
US6839444B2 (en) * | 2000-11-30 | 2005-01-04 | New Transducers Limited | Loudspeakers |
GB2403091B (en) * | 2003-06-18 | 2006-08-09 | B & W Loudspeakers | Diaphragms for loudspeaker drive units |
US20050089187A1 (en) * | 2003-10-24 | 2005-04-28 | Turnmire Patrick M. | Nanoporous diaphragm for electromagentic transducer |
US7787645B2 (en) | 2007-11-30 | 2010-08-31 | Clair Brothers Audio Systems Inc. | Loudspeaker-transducer array |
US20100172537A1 (en) * | 2008-12-31 | 2010-07-08 | Jack Blaine Campbell | Loudspeaker with rear surround support |
-
2011
- 2011-04-20 FR FR1153405A patent/FR2974476A1/en not_active Withdrawn
-
2012
- 2012-04-13 JP JP2014505698A patent/JP6014118B2/en active Active
- 2012-04-13 WO PCT/FR2012/050824 patent/WO2012143657A1/en active Application Filing
- 2012-04-13 EP EP12724668.4A patent/EP2700247B1/en active Active
- 2012-04-13 US US14/112,043 patent/US9544693B2/en active Active
Also Published As
Publication number | Publication date |
---|---|
FR2974476A1 (en) | 2012-10-26 |
WO2012143657A1 (en) | 2012-10-26 |
EP2700247B1 (en) | 2018-10-31 |
JP2014516497A (en) | 2014-07-10 |
US20140037128A1 (en) | 2014-02-06 |
CN103650530A (en) | 2014-03-19 |
US9544693B2 (en) | 2017-01-10 |
JP6014118B2 (en) | 2016-10-25 |
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