CN107147961A - A kind of high sound level acoustical generator and its manufacture method - Google Patents
A kind of high sound level acoustical generator and its manufacture method Download PDFInfo
- Publication number
- CN107147961A CN107147961A CN201710377209.3A CN201710377209A CN107147961A CN 107147961 A CN107147961 A CN 107147961A CN 201710377209 A CN201710377209 A CN 201710377209A CN 107147961 A CN107147961 A CN 107147961A
- Authority
- CN
- China
- Prior art keywords
- loudspeaker
- shell
- pcb
- acoustical generator
- sound level
- 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
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 10
- 238000000034 method Methods 0.000 title claims abstract description 9
- 239000003292 glue Substances 0.000 claims abstract description 18
- 239000003822 epoxy resin Substances 0.000 claims abstract description 17
- 239000000463 material Substances 0.000 claims abstract description 17
- 239000002245 particle Substances 0.000 claims abstract description 17
- 229920000647 polyepoxide Polymers 0.000 claims abstract description 17
- 239000004033 plastic Substances 0.000 claims abstract description 7
- 229920003023 plastic Polymers 0.000 claims abstract description 7
- 238000001802 infusion Methods 0.000 claims abstract description 4
- 230000002093 peripheral effect Effects 0.000 claims description 4
- 229920000426 Microplastic Polymers 0.000 claims description 3
- 230000015572 biosynthetic process Effects 0.000 claims description 3
- 238000007789 sealing Methods 0.000 claims description 3
- CEOCDNVZRAIOQZ-UHFFFAOYSA-N pentachlorobenzene Chemical compound ClC1=CC(Cl)=C(Cl)C(Cl)=C1Cl CEOCDNVZRAIOQZ-UHFFFAOYSA-N 0.000 claims 9
- 238000002347 injection Methods 0.000 claims 1
- 239000007924 injection Substances 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 5
- 239000000203 mixture Substances 0.000 abstract description 3
- FPWNLURCHDRMHC-UHFFFAOYSA-N 4-chlorobiphenyl Chemical compound C1=CC(Cl)=CC=C1C1=CC=CC=C1 FPWNLURCHDRMHC-UHFFFAOYSA-N 0.000 description 12
- 238000010586 diagram Methods 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 230000005526 G1 to G0 transition Effects 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000012811 non-conductive material Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen 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
- H04R1/025—Arrangements for fixing loudspeaker transducers, e.g. in a box, furniture
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R27/00—Public address systems
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R31/00—Apparatus or processes specially adapted for the manufacture of transducers or diaphragms therefor
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Manufacturing & Machinery (AREA)
- Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
- Details Of Audible-Bandwidth Transducers (AREA)
Abstract
Include the rear and front end shell penetrated, the loudspeaker that is arranged in shell and PCB the invention discloses a kind of high sound level acoustical generator, loudspeaker and PCB are electrical connected, loudspeaker is installed in enclosure and enclosure is divided into front cavity and rear chamber, provided with the mixed layer being made up of epoxy resin and light material mix particles in rear chamber, loudspeaker rear end, PCB are covered by mixed layer；Its manufacture method, including step a are also disclosed, loudspeaker is fitted into enclosure and applies marine glue and is fixed；Step b, loudspeaker rear end is attached to by PCB by bolt, and sound chamber lid is loaded in front cavity；Step c, is sealed to injecting glue after the screw hole column of sound chamber lid periphery；Step d, the injected plastic particle into rear chamber；Step e, the infusion epoxy resin glue into rear chamber.Its technical scheme can reduce packed density using the mixture of epoxy resin and light material particle, effectively improve volume, and play the effect of waterproof.
Description
Technical field
The present invention relates to the acoustical generator equipment technical field that open air is used, and in particular to a kind of high sound level acoustical generator, also relates to
And the manufacture method of high sound level acoustical generator.
Background technology
Acoustical generator is widely used in life and industry, is applied especially on engineering truck, and the acoustical generator one of prior art
As include housing, wiring board and loudspeaker, wiring board, loudspeaker be each provided in housing, and wiring board is electrically connected with loudspeaker.
Refering to the Chinese patent " waterproof acoustical generator " that Patent No. is CN204652637U, a kind of waterproof sounding is disclosed
Device, including housing (1), wiring board (2) and loudspeaker (3), described wiring board (2), loudspeaker (3) are each provided at housing (1)
Interior, described wiring board (2) is electrically connected with loudspeaker (3)；Sealed between described loudspeaker (3) and housing (1)；Described shell
Provided with the epoxy resin block (5) sealed in body (1)；The rear end of the loudspeaker (3), wiring board (2) are covered by
In epoxy resin block (5), it can prevent rainwater or muddy water from corroding.
The problem of above-mentioned patent solves rain erosion and waterproof, but filled in housing after epoxy resin, due to pure
Filling epoxide-resin glue density it is larger, the phonation volume of internal loudspeaker can be influenceed.
The content of the invention
For the above-mentioned problems in the prior art, one kind is now provided and is intended to fill after epoxy resin in shell
The high sound level acoustical generator of loudspeaker phonation volume is not interfered with, to overcome above-mentioned technological deficiency.
Concrete technical scheme is as follows：
A kind of high sound level acoustical generator, including shell, the loudspeaker and PCB circuits that are arranged in shell that rear and front end is penetrated
Plate, and loudspeaker and PCB be electrical connected, loudspeaker be installed in enclosure and by enclosure be divided into front cavity and
Provided with the mixed layer sealed in rear chamber, rear chamber, and mixed layer is by epoxy resin and light material mix particles structure
Into the rear end of loudspeaker, PCB are covered by mixed layer.
Preferably, in being also equipped with a sound chamber lid in front cavity, and sound chamber lid rear side cover together in loudspeaker front end.
Preferably, the periphery ring-type of sound chamber lid is uniformly provided with several to the screw hole column that wears screw, and sound chamber
Lid is installed in front cavity by screw.
Preferably, loudspeaker is horizontally installed in shell, and pass through the internal perisporium of the connected shell of marine glue.
Preferably, the formation of the inside annular projection of the internal perisporium of shell has the annular matched with loudspeaker peripheral shape to install
Frame.
Preferably, PCB is integrally L-shaped, the rear end of PCB and loudspeaker passes through a bolt stationary phase
Even, and between PCB and loudspeaker provided with one it is made up of plastic material and in the pillar of central column, pillar is sheathed on bolt
Outside.
Preferably, being additionally provided with a binding post being mutually electrically connected with PCB on shell, binding post includes a screw, rubber
Rubber gasket and two nuts, screw passes through the conducting strip being connected with PCB, rubber washer, open up in case peripheral wall
Circular hole is connected with two nut threads.
Preferably, light material particle is plastic pellet.
Preferably, the quantity of screw hole column is four, and the week side of boss for being arranged in sound chamber lid of uniform ring-type.
Present invention also offers a kind of method to manufacture high sound level acoustical generator, comprise the following steps:
Step a, is fitted into enclosure by loudspeaker and marine glue is applied at cooperation and fix；
Step b, PCB and pillar is attached to by bolt the rear end of loudspeaker, and sound chamber lid is loaded into shell
Fixed in front cavity and with screw；
Step c, screw hole column injecting glue sealing after screw is screwed in sound chamber lid periphery
Step d, shell is overturn to rear end placed longitudinally position upward, into rear chamber injected plastic particle to
The position that the main part of PCB is flush；
Step e, the position that infusion epoxy resin glue is flush to the edge with outer casing back into rear chamber.
The beneficial effect of above-mentioned technical proposal is：
High sound level acoustical generator includes the rear and front end shell penetrated, the loudspeaker that is arranged in shell and PCB, raises
Sound device and PCB are electrical connected, and loudspeaker is installed in enclosure and enclosure is divided into front cavity and rear chamber,
Mixed layer filled with epoxy resin and light material particle in rear chamber, the rear end of loudspeaker, PCB are covered by
In mixed layer.Packed density can be reduced using the mixed layer of epoxy resin and light material particle, volume is effectively improved, compare
Volume loss can be reduced in traditional acoustical generator and bigger sound is sent so that sound level is bigger, and can effectively play anti-
The effect of water.
Brief description of the drawings
Fig. 1 is the Split type structure schematic diagram of high sound level acoustical generator of the present invention；
Fig. 2 is the side cross-sectional view of high sound level acoustical generator of the present invention；
Fig. 3 is the positive structure schematic of high sound level acoustical generator of the present invention；
Fig. 4 is the structure schematic diagram of high sound level acoustical generator of the present invention.
Embodiment
In order that the technical means, the inventive features, the objects and the advantages of the present invention are easy to understand, it is real below
The high sound level acoustical generator that example combination 1 to 4 couple of present invention of accompanying drawing provides is applied to be specifically addressed.
It is the Split type structure schematic diagram of high sound level acoustical generator refering to Fig. 1；It is the side section of high sound level acoustical generator with reference to Fig. 2
Structural representation；And Fig. 3, it is the positive structure schematic of high sound level acoustical generator；And Fig. 4, it is the back of the body of high sound level acoustical generator
Face structural representation.Structure as shown in Figure 2 is defined for product side surface direction, and in Fig. 2 paper direction from right to left
For the present invention by front end rear end direction.
Shown in as shown in Figure 1 to Figure 4, the high sound level acoustical generator that the present invention is provided includes shell 1, the setting that rear and front end is penetrated
In loudspeaker 2 and PCB 3 in shell 1, and loudspeaker 2 and PCB 3 are electrical connected, wherein, loudspeaker 2 is fixedly mounted with
Front cavity 11 and rear chamber 12 will be divided into the inside of shell 1 and inside shell 1, it is mixed provided with what is sealed in rear chamber 12
Layer 5 is closed, and mixed layer 5 is made up of epoxy resin 52 and the mixing of light material particle 51, the rear end of loudspeaker 2, PCB 3
It is covered by mixed layer 5.
In this programme, it is contemplated that can influence the sound that loudspeaker 2 is sent using the filling of pure epoxy resin 52, and use ring
The mixed layer 5 of oxygen tree fat 52 and light material particle 51 can reduce packed density, effectively improve volume.And above-mentioned front cavity
Sealed against each other between 11 and rear chamber 12.
In a preferred embodiment, specifically as shown in Figures 1 and 2, in being also equipped with one in front cavity 11
Sound chamber lid 4, and sound chamber lid 4 rear side cover together in loudspeaker 2 front end.Further, the periphery ring-type of sound chamber lid 4 is uniformly set
Several are equipped with to be installed in front cavity 11 by screw to the screw hole column 41 that wears screw, and sound chamber lid 4.Further,
The inside of shell 1 is provided with the screw being oppositely arranged with screw hole column 41, and screw injecting glue after screwing in screw hole column 41 and screw is sealed,
The side outflow forward from the gap of screw when rear chamber 12 fills mixed layer 5 can be effectively prevented, and front side waterproof can be played
Effect.And specifically, the quantity of screw hole column 41 is four, and the week side of boss for being arranged in sound chamber lid 4 of uniform ring-type.
As further preferred embodiment, loudspeaker 2 is horizontally installed in shell 1, and connected outer by marine glue 6
The internal perisporium of shell 1.Further, the formation of the inside annular projection of the internal perisporium of shell 1 has what is matched with the peripheral shape of loudspeaker 2
Annular mounting frame 13.Specifically, the rear end of loudspeaker 2 stretches to perisporium and the phase of annular mounting frame 13 by the front opening of shell 1
Support, then annular configuration marine glue 6 is fixed.So as to play position fix and waterproof effect.
In a preferred embodiment, specifically as shown in Figure 1, Figure 2 and shown in Fig. 4, it is in " L " that PCB 3 is overall
Type, PCB 3 and the rear end of loudspeaker 2 are fixedly linked by a bolt 31, and are provided between PCB 3 and loudspeaker 2
One is made up and in the pillar 32 of central column, pillar 32 is sheathed on outside bolt 31 of plastic material, to by PCB 3
Kept apart between main part and loudspeaker 2 with non-conductive material, effectively improve the tone color of the sounding of loudspeaker 2, it is to avoid interference.
As further preferred embodiment, a binding post being mutually electrically connected with PCB 3 is additionally provided with shell 1
7, binding post 7 includes a screw 71, rubber washer 72 and two nuts 73, and screw 71 is passed through and leading that PCB 3 is connected
Electric piece 33, rubber washer 72, the circular hole 14 opened up on the perisporium of shell 1 are threadedly coupled with two nuts 73.In addition, the present embodiment
In, high sound level acoustical generator also includes a support 74, and support 74 is affixed to merge with the outside of shell 1 and is mutually electrically connected with screw 71.
In addition, as shown in Fig. 3, Fig. 4 and Fig. 1, the electric connection line of PCB 3, i.e., red-black electrical connection is by opening up
Passed in another through hole 15 on the perisporium of shell 1, realize the function that cabling is electrically connected with externally fed equipment, and it is close at through hole 15
Envelope processing, it is conventional means mode, therefore is not repeated here.In addition, above-mentioned light material particle 51 is plastic pellet, but
Can also be the particle that other universal light materials are made, such as plastic cement is possibly even to use rubber-like material system
Into particle substitute, therefore be not limited to this.It is worthy of note that, in being the inner structure of rear chamber 12 of clear display housing 1, Fig. 4
Omission shows mixed layer 5, but should not turn into the reasons why itself and content be not corresponding.It is worthy of note that, the meaning of above-mentioned high sound level
Think to refer to damage smaller relative to existing product sound, bigger sound can be obtained, sound level is typically more than 60 decibels.
Hereinafter, illustrated with a kind of specific embodiment, it should be pointed out that described in implementation below it
Structure, technique, selection are only to the feasibility for illustrating embodiment, and the intention of the unrestricted scope of the present invention.
The present invention is during the manufacturing, and the process and step of manufacture method are mainly as follows：
Step a, is fitted into the inside of shell 1 by loudspeaker 2 and marine glue 6 is applied at cooperation and fix；Rigging position then by
The above-mentioned annular mounting frame 13 in shell 1 is positioned；
Step b, PCB 3 and pillar 32 is attached to by bolt 31 rear end of loudspeaker 2, and sound chamber lid 4 is loaded
Fixed in the front cavity 11 of shell 1 and with screw；
Step c, the injecting glue sealing after screw is screwed in of screw hole column 41 to the periphery of sound chamber lid 4；
Step d, shell 1 is overturn to rear end placed longitudinally position upward, and into rear chamber 12, injected plastic particle is extremely
The position being flush with the main part of PCB 3；
Step e, the position that infusion epoxy resin glue is flush to the edge with the rear end of shell 1 into rear chamber 12.
The production process that this product is completed after certain time is finally stood, and time of repose is with atmospheric temperature or interior
The change of temperature and it is different, can also insert in various drying equipments machine dries, and it is conventional means, therefore is not repeated here.
In addition, eliminating the cabling mode of electrical connection and the installation steps of binding post 7 in step, it is carried out after the stepb, is normal
The common mounting means of rule, and also omit the mounting means of pillar 32 in step b, those skilled in that art are from above-mentioned production
It can draw, therefore repeat no more in the description of product structure.
The acoustical generator obtained by above-mentioned steps can reduce volume loss compared to traditional acoustical generator and send bigger
Sound so that sound level is bigger, and the effect of waterproof can be effectively played.
Presently preferred embodiments of the present invention is the foregoing is only, is merely illustrative for the purpose of the present invention, and it is non-limiting
's.Those skilled in the art understands, many changes can be carried out to it in the spirit and scope that the claims in the present invention are limited,
Modification, in addition it is equivalent, but fall within protection scope of the present invention.
Claims (10)
1. a kind of high sound level acoustical generator, including shell (1) that rear and front end is penetrated, the loudspeaker that is arranged in the shell (1)
And PCB (3), and the loudspeaker (2) and the PCB (3) are electrical connected (2), it is characterised in that
The loudspeaker (2) be installed in the shell (1) it is internal and will be divided into inside the shell (1) front cavity (11) and after
Provided with the mixed layer (5) sealed in cavity (12), the rear chamber (12), and the mixed layer (5) is by epoxy resin
(52) constituted with light material particle (51) mixing, the rear end of the loudspeaker (2), PCB (3) are covered by described
In mixed layer (5).
2. high sound level acoustical generator as claimed in claim 1, it is characterised in that in being also equipped with one in the front cavity (11)
Sound chamber lid (4), and the sound chamber lid (4) rear side cover together in the loudspeaker (2) front end.
3. high sound level acoustical generator as claimed in claim 2, it is characterised in that the periphery ring-type of the sound chamber lid (4) is uniform
Several are provided with to the screw hole column (41) that wears screw, and the sound chamber lid (4) by the screw be installed in it is described before
In cavity (11).
4. high sound level acoustical generator as claimed in claim 1 or 2, it is characterised in that the loudspeaker (2) is horizontally installed to described
In shell (1), and pass through the internal perisporium of the connected shell (1) of marine glue (6).
5. high sound level acoustical generator as claimed in claim 4, it is characterised in that the internal perisporium of the shell (1) is convex to inner annular
The formation risen has the annular mounting frame (13) matched with the loudspeaker (2) peripheral shape.
6. the high sound level acoustical generator as described in claim 1 or 3, it is characterised in that the PCB (3) is in integrally " L "
Type, the PCB (3) and the rear end of loudspeaker (2) are fixedly linked by a bolt (31), and the PCB (3)
It is made up between the loudspeaker (2) provided with one of plastic material and in the pillar (32) of central column, the pillar (32) is arranged
In the bolt (31) outside.
7. high sound level acoustical generator as claimed in claim 6, it is characterised in that be additionally provided with the shell (1) one with it is described
The binding post (7) that PCB (3) is mutually electrically connected, the binding post (7) includes a screw (71), rubber washer (72) and two
Individual nut (73), the screw (71) passes through conducting strip (33), the rubber washer being connected with the PCB (3)
(72), the circular hole (14) opened up on shell (1) perisporium is threadedly coupled with two nuts (73).
8. high sound level acoustical generator as claimed in claim 6, it is characterised in that the light material particle (51) is plastic pellet
Son.
9. high sound level acoustical generator as claimed in claim 3, it is characterised in that the quantity of the screw hole column (41) is four, and
The week side of boss for being arranged in the sound chamber lid (4) of uniform ring-type.
10. a kind of method to manufacture the high sound level acoustical generator as described in above-mentioned any one of claim 1 to 9, its feature exists
In comprising the following steps:
Step a, is fitted into the shell (1) inside by the loudspeaker (2) and marine glue (6) is applied at cooperation and fix；
Step b, the PCB (3) and pillar (32) is attached to by bolt (31) rear end of the loudspeaker (2),
The sound chamber lid (4) is loaded in the front cavity (11) of the shell (1) and fixed with screw；
Step c, screw hole column (41) injecting glue sealing after screw is screwed in sound chamber lid (4) periphery；
Step d, the shell (1) is overturn to rear end placed longitudinally position upward, to the rear chamber (12) in injection mould
The position that material particle is flush to the main part with the PCB (3)；
Step e, the position being flush to the interior infusion epoxy resin glue of the rear chamber (12) to the edge with the shell (1) rear end
Put.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710377209.3A CN107147961B (en) | 2017-05-25 | 2017-05-25 | High sound level sounder and manufacturing method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710377209.3A CN107147961B (en) | 2017-05-25 | 2017-05-25 | High sound level sounder and manufacturing method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107147961A true CN107147961A (en) | 2017-09-08 |
| CN107147961B CN107147961B (en) | 2024-08-23 |
Family
ID=59780131
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710377209.3A Active CN107147961B (en) | 2017-05-25 | 2017-05-25 | High sound level sounder and manufacturing method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107147961B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11176919B2 (en) | 2018-11-08 | 2021-11-16 | Apple Inc. | Acoustic filler including acoustically active beads and expandable filler |
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| CN2101611U (en) * | 1991-09-02 | 1992-04-15 | 龙武林 | Music alarm for steering and backing of car |
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| KR101043653B1 (en) * | 2010-12-07 | 2011-06-27 | 유한회사 삼신기업 | Composition of forming for soundproofing plate |
| CN102265332A (en) * | 2008-12-23 | 2011-11-30 | 罗伯特·博世有限公司 | Ultrasonic transducer for use in a fluid medium |
| CN203167186U (en) * | 2013-01-30 | 2013-08-28 | 威立达数码科技(深圳)有限公司 | Loudspeaker box |
| CN104393880A (en) * | 2014-12-11 | 2015-03-04 | 安徽波维电子科技有限公司 | K-waveband satellite receiving outdoor unit |
| CN204652637U (en) * | 2015-06-19 | 2015-09-16 | 宁波东方电子有限公司 | Waterproof acoustical generator |
| CN205249611U (en) * | 2015-12-11 | 2016-05-18 | 延锋伟世通电子科技（南京）有限公司 | Plug -in components formula electronic components's fixed knot constructs |
| CN206713009U (en) * | 2017-05-25 | 2017-12-05 | 宁波东方电子有限公司 | A kind of high sound level acoustical generator |
-
2017
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4044855A (en) * | 1974-11-01 | 1977-08-30 | Sansui Electric Co., Inc. | Loudspeaker device |
| CN2101611U (en) * | 1991-09-02 | 1992-04-15 | 龙武林 | Music alarm for steering and backing of car |
| US5731553A (en) * | 1997-01-29 | 1998-03-24 | Excel Sound & Art | Speaker system |
| JP2004312471A (en) * | 2003-04-08 | 2004-11-04 | Shima System:Kk | Speaker system |
| JP2005037218A (en) * | 2003-07-14 | 2005-02-10 | Matsushita Electric Ind Co Ltd | Ultrasonic transmitter/receiver and manufacturing method therefor |
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| CN102265332A (en) * | 2008-12-23 | 2011-11-30 | 罗伯特·博世有限公司 | Ultrasonic transducer for use in a fluid medium |
| KR101043653B1 (en) * | 2010-12-07 | 2011-06-27 | 유한회사 삼신기업 | Composition of forming for soundproofing plate |
| CN102098610A (en) * | 2011-03-11 | 2011-06-15 | 湖南继善高科技有限公司 | Loudspeaker unit, loudspeaking device and orientated sound wave bird driving device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11176919B2 (en) | 2018-11-08 | 2021-11-16 | Apple Inc. | Acoustic filler including acoustically active beads and expandable filler |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107147961B (en) | 2024-08-23 |
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