CN109413542A - A kind of underwater acoustical generator of low-frequency high-power - Google Patents
A kind of underwater acoustical generator of low-frequency high-power Download PDFInfo
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- CN109413542A CN109413542A CN201811391678.1A CN201811391678A CN109413542A CN 109413542 A CN109413542 A CN 109413542A CN 201811391678 A CN201811391678 A CN 201811391678A CN 109413542 A CN109413542 A CN 109413542A
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Classifications
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- 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
- H04R1/44—Special adaptations for subaqueous use, e.g. for hydrophone
Abstract
The invention discloses a kind of underwater acoustical generator of low-frequency high-power, including acoustical generator shell, acoustical generator shell one side is open, the open-mouth is provided with the first vibrating diaphragm and the second vibrating diaphragm, it is closely connected between first vibrating diaphragm and the second vibrating diaphragm, the first vibrating diaphragm is set to outside, and the second vibrating diaphragm is set to inside；Magnetic material is arranged in acoustical generator enclosure interior, it is mutually enclosed outside magnetic material by the first permeability magnetic material and the second permeability magnetic material, first permeability magnetic material and the second permeability magnetic material form the gap that can be inserted one end of voice coil on the enclosing face of the second vibrating diaphragm of face, and the other end of voice coil is connect with the second vibrating diaphragm；Wherein there are gaps between the open wall of the both sides of the face and acoustical generator shell of the first vibrating diaphragm and the second vibrating diaphragm, and the both sides of the face of the first vibrating diaphragm and the second vibrating diaphragm pass through flexible flexible joining part and connect with open wall.Underwater generator architecture provided by the invention is simple, can pressure and voice coil temperature in real-time monitoring shell, voice coil temperature enhancing voice coil service life is effectively reduced.
Description
Technical field
The invention belongs to field of transducer, are related to a kind of underwater acoustical generator of low-frequency high-power.
Background technique
China's Coastal Areas thermal power plant is large number of at present, since using seawater, as recirculated cooling water, border on the sea is electric
While factory can save comparable investment operating cost, various aquatic organisms bring circulation by water pump, seriously threaten
The safe operation of unit.In the various factors for influencing stock of fish amount, the hydraulic turbine may cause the decline of fish survival rate, danger
The evil ecological balance.In addition, drilling platforms and submarine pipeline are also easy to be damaged when encountering larger fish or the shoal of fish.Platform is normal
Large amount of organic can be generated in production process, this can attract a large amount of fish to come near platform, and then cause fish fan and
Fisherman brings security risk to the normal operation of platform to fishing around it.For guarantee underwater facility and operation at sea safety,
Solve between the mankind and underwater species the problems such as interfering with each other, protecting ecology and sustainable development need to develop a set of reliable drive
Fish equipment.This equipment protection is also possible to the movable protective with naval vessel either the protection of fixed regional area.Needle
To the market demand, the result of study of some scholars shows that the sensitive frequency threshold of most of fish in 100-3000Hz, is sent under water
Low-frequency sound wave effective attracting or can drive fish, and different according to the type of marine organisms, the selection of frequency of sound wave is different.Therewith very
More pallesthesiometers, aquafarm sound equipment come out, their structure is mostly the structure using air horn, and on a speaker
Waterproof case is added to realize underwater operation, but its efficiency is lower, Acoustic Wave Propagation is apart from short；Some scholars use piezoelectric structure, shell
Watertight is carried out using encapsulating polyurethane, but the low frequency sounding effect of piezoelectric type pallesthesiometer is bad；There are also use electrodynamic type knot
Structure, such as CN1744769, electric water music body-sensing vibration transmitting transducer is a kind of amusement equipment of small size, and structure is small
Ingeniously, operating distance is limited, and weak heat-dissipating not can be carried out industrial application；A kind of underwater very low frequency broadband in patent CN102075828A
Sound source, compression flexible air-bag volume guarantees that enclosure interior air pressure and external water pressure reach unanimously under the equipment utilization different depth,
This structural volume is big, and underwater installation, which is hung, keeps balanced structure complicated.
In addition, there is many gas-liquid heat exchange devices in the industries such as electric power, heat supply, chemical industry.The equipment is in long-term use process
In be also easy to produce scale problems, seriously affect its heat exchange efficiency and industrial normal operation.In order to realize on-line cleaning, environmental protection
Energy-efficient purpose has ultrasound wave descaling device in the market.But since dirty matter is different, the sound wave scale removal effect of different frequency is not yet
Equally, the descaling equipment of low frequency does not occur also on the market, so the low-frequency sound wave that the underwater acoustical generator of low frequency of the invention generates exists
Online assignment may be implemented in scale removal field, and effective antiscale is at low cost, increases service life of equipment.
Summary of the invention
It is an object of the invention to overcome the shortcomings of existing underwater acoustical generator, it is simple to provide a kind of structure, real-time monitoring shell
The underwater acoustical generator of voice coil temperature enhancing voice coil service life is effectively reduced, it can be achieved that underwater low frequency in interior pressure and voice coil temperature
The underwater acoustical generator of high-power long distance work.
Technical scheme is as follows:
A kind of underwater acoustical generator of low-frequency high-power, including acoustical generator shell, acoustical generator shell one side is open, is arranged in the open-mouth
There are the first vibrating diaphragm and the second vibrating diaphragm, closely connected between the first vibrating diaphragm and the second vibrating diaphragm, the first vibrating diaphragm is set to outside, the second vibration
Film is set to inside；Magnetic material is arranged in acoustical generator enclosure interior, passes through the first permeability magnetic material and second outside magnetic material
Permeability magnetic material mutually encloses, and the first permeability magnetic material and the second permeability magnetic material are formed on the enclosing face of the second vibrating diaphragm of face and can be incited somebody to action
The gap that one end of voice coil is inserted, the other end of voice coil are connect with the second vibrating diaphragm；Wherein the first vibrating diaphragm and the second vibrating diaphragm
There are gap between both sides of the face and the open wall of acoustical generator shell, and the both sides of the face of the first vibrating diaphragm and the second vibrating diaphragm pass through it is soft
Property flexible joining part connect with open wall.
The underwater acoustical generator of the low-frequency high-power, the open-position-side both ends connecting flange ring of acoustical generator shell 2.
The underwater acoustical generator of the low-frequency high-power, the first permeability magnetic material 10a, the second permeability magnetic material 10b and magnetism
Material 11 is fixed by binder, and the magnetic material 11 is neodymium iron boron.
The underwater acoustical generator of the low-frequency high-power further includes cooling cycle heat exchange pipeline, pressure-equalizing passageway and electromagnetism
Control valve, wherein around being wrapped on voice coil, head and the tail connect to form cooling with solenoid electric valve cooling cycle heat exchange pipeline
Circulation loop；Pressure-equalizing passageway one end is set to acoustical generator enclosure interior bottom end, and the other end connects solenoid electric valve.
The underwater acoustical generator of the low-frequency high-power, the flexibility flexible joining part are flexible perpendicular to connection direction
Connector.
The underwater acoustical generator of the low-frequency high-power, acoustical generator enclosure interior are provided with magnetic circuit fixed frame, and the magnetic circuit is solid
Determine frame one end and be fixedly connected with the first permeability magnetic material, the other end is fixedly connected with the inner wall of acoustical generator shell.
The underwater acoustical generator of the low-frequency high-power is provided with temperature sensor on the second vibrating diaphragm, sets on magnetic circuit fixed frame
It is equipped with pressure sensor, temperature sensor and pressure sensor pass through the control port being arranged on route and acoustical generator shell and connect
It connects.
The underwater acoustical generator of the low-frequency high-power, the lead of voice coil connect with the signal port being arranged on acoustical generator shell
It connects.
The underwater acoustical generator of the low-frequency high-power, voice coil coiling multilayer enameled wire, post on every layer of enameled wire it is axial
The cooling fin of cloth.
The underwater acoustical generator of the low-frequency high-power, staggered between every two layers of cooling fin, cooling fin extends and with the
The connection of two vibrating diaphragms.
Underwater acoustical generator provided by the invention includes temperature sensor and pressure sensor, and temperature sensor can real-time monitoring
The temperature of voice coil, temperature are more than that then solenoid electric valve opens cooling cycle pipeline to setting value, and the refrigerant in cooling cycle pipeline can
The temperature of voice coil is effectively reduced, avoids voice coil temperature is excessively high from blowing；Pressure in pressure sensor real-time monitoring shell, when pressure in shell
When inconsistent with shell external pressure, Electromagnetic Control valve opening pressure equalizing main, adjustment housings internal and external pressure balance.
Underwater acoustical generator provided by the invention includes pressure-equalizing passageway, pressure in adjustable shell, compared with traditional structure,
Eliminate flexible air-bag, it is excessive and equipment is top-heavy to avoid volume caused by installation flexible air-bag, installation just the defects of；
Coiling lattice coil on the voice coil that underwater acoustical generator provided by the invention includes, coiling multilayer enameled wire on voice coil, every layer
Axially uniformly distributed cooling fin, staggered, the gap between every layer of enameled wire of increase between every two layers of cooling fin are posted on enameled wire.
Cooling fin is extended to be connect with the second vibrating diaphragm, most of heat can be discharged into water by the second vibrating diaphragm and the first vibrating diaphragm.
Underwater acoustical generator provided by the invention overcomes existing sound wave descaling equipment only with ultrasonic transducer, can not go
Except the problem of the dirty matter in part, better effect after low-frequency sound wave scale removal is used.The underwater acoustical generator of low frequency is added on descaling equipment,
It can use the low-frequency sound wave shear action that spread speed difference accordingly generates in different medium in pipeline, reach and preferably remove
Dirty effect.
The underwater acoustical generator of low-frequency high-power provided by the invention can achieve resonance frequency < 200Hz, sound at resonance frequency
Arbitrarily downgrade up to 180dB, and the distance of propagation is farther, expels the range of marine organisms bigger, better effect.
Aluminum alloy materials, matter can be used in the underwater acoustical generator of low-frequency high-power provided by the invention, flange ring, acoustical generator shell
Light anti-corrosion.Can be fastened by screw on the inside of flexible flexible joining part with the first vibrating diaphragm and the second vibrating diaphragm, on the outside of flexible flexible joining part and
Flange ring and cylindrical shell can be fastened by screw.There are two use for flexible flexible joining part, are first sealing waterproofs, are second conducts
Elastic construction guarantees that the first vibrating diaphragm and the second vibrating diaphragm can move back and forth.It is connected by screw between voice coil and the second vibrating diaphragm tight
Gu multilayer enamel covered wire resistant to high temperature can be wound on voice coil, high-temperature plastic hydropexis is used between enamel covered wire.The lead edge of voice coil
Second vibrating diaphragm and acoustical generator shell wall side are postponed and are connect with signal port.Solenoid electric valve and cooling cycle heat exchange pipeline and pressure
Equalizing main connection, pressure-equalizing passageway are laid with along acoustical generator enclosure interior bottom end lower edge.It is uniformly wrapped on the outside of voice coil
One layer of ultra-thin cooling cycle heat exchange pipeline is then changed using solenoid electric valve control cooling cycle when voice coil temperature is excessively high
Cooling medium in heat pipeline flows speed, guarantees rapid cooling, reduces voice coil and overheats the risk burnt, increases the use of voice coil
Service life.If shell external and internal pressure is unbalance, it can be filled by pressure-equalizing passageway or discharge gas, make shell external and internal pressure
Reach balance.It is adhesively fixed, then is filled by glue between first permeability magnetic material and the second permeability magnetic material and NdFeB material
The magnetic induction intensity of magnetic, magnetic gap can be adjusted as needed.Magnetic circuit fixed frame is to guarantee that it is working for fixing magnet steel
It does not move, does not rotate in the process.Magnetic circuit fixed frame and the first permeability magnetic material and acoustical generator inner walls are fastened by screw.Temperature
Sensor can be patch type temperature sensor, is close to voice coil using glue or screw and fixes, voice coil can be monitored in real time
Temperature.The output data line of temperature sensor is postponed and is connect with control port along the second vibrating diaphragm and acoustical generator inner walls face.Pressure
Force snesor can be fixed in the reserved card slot of magnetic circuit fixed frame, and the output data line of pressure sensor is by magnetic circuit fixed frame bottom
It draws in the line outlet groove at end, is connect with control port.The intracorporal pressure of pressure sensor real-time monitoring acoustical generator shell, when in shell
Pressure and shell outside pressure it is inconsistent when, can according to actual requirement adjust solenoid electric valve.Signal port and control port
It can be made of watertight connector and watertight cable, watertight cable uses and uses Special tensile flexible cable under water, outside cable
Sheath uses import polyethers composite, has many advantages, such as wear-resisting, corrosion-resistant, oil resistant, acid and alkali-resistance and anti-aging, watertight connector
Using deep water connector, it is sealed between cylindrical shell by way of sealing ring and bolt presses.
The underwater acoustical generator of low-frequency high-power of the present invention uses large-sized magnetic Circuit Design, and permeability magnetic material uses neodymium resistant to high temperature
Iron boron material, large-sized magnetic Circuit Design can volume of air in a large amount of compression shell, enhance the underwater acoustical generator of low-frequency high-power
Pressure-resistant performance, while large scale is conducive to trigger low-frequency sound wave.
Pressure-equalizing passageway of the present invention is arranged in acoustical generator enclosure interior bottom end, and gas has been effectively ensured in the intracorporal stream of shell
Dynamic property.Have solenoid electric valve, pressure can be adjusted as desired at any time, be then not required to gasbag pressure compensating module, also should not counterweight,
To reduce the overall volume and weight of underwater acoustical generator.
Detailed description of the invention
Fig. 1 is the underwater acoustical generator structural schematic diagram of low-frequency high-power described in embodiment 1；
Fig. 2 is the underwater acoustical generator structural schematic diagram of low-frequency high-power as described in example 2；；
Label in figure 1 above and Fig. 2,1 flange ring, 2 acoustical generator shells, 3 first vibrating diaphragms, 4 second vibrating diaphragms, 5 is flexible soft
Connector, 6 voice coils, 7 cooling cycle heat exchange pipelines, 8 pressure-equalizing passageways, 9 solenoid electric valves, 10a the first magnetic conduction material
Material, the second permeability magnetic material of 10b, 11 magnetic materials, 12 magnetic circuit fixed frames, 13 temperature sensors, 14 pressure sensors, 15
Control port, 16 signal ports.
Specific embodiment:
Below in conjunction with attached drawing, the underwater acoustical generator of low-frequency high-power provided by the invention is further described.
Embodiment 1:
As shown in Figure 1, for the underwater acoustical generator structural schematic diagram of low-frequency high-power provided in this embodiment, including acoustical generator shell 2,
2 one side of acoustical generator shell is open, and the open-mouth is provided with the first vibrating diaphragm 3 and the second vibrating diaphragm 4, the first vibrating diaphragm 3 and the second vibrating diaphragm 4
Between closely connect, the first vibrating diaphragm 3 be set to outside, the second vibrating diaphragm 4 be set to inside；Acoustical generator shell 2 is internally provided with magnetic
Property material 11, mutually enclosed by the first permeability magnetic material 10a and the second permeability magnetic material 10b outside magnetic material 11, the first magnetic conduction
Material 10a and the second permeability magnetic material 10b is formed on the enclosing face of the second vibrating diaphragm of face 4 can be inserted into it for one end of voice coil 6
In gap, the other end of voice coil 6 connect with the second vibrating diaphragm 4；The wherein both sides of the face and hair of the first vibrating diaphragm 3 and the second vibrating diaphragm 4
There are gaps between the open wall of sound device shell 2, and the both sides of the face of the first vibrating diaphragm 3 and the second vibrating diaphragm 4 are flexible coupling by flexibility
Part 5 is connect with open wall.The lead of voice coil 6 is connect with the signal port 16 being arranged on acoustical generator shell 2；Acoustical generator shell 2
Open-position-side both ends connecting flange ring 1 play convenient for connect with other equipment, while flange ring 1 and the compacting of acoustical generator shell 2
Sealing function.
The underwater acoustical generator of low-frequency high-power provided in this embodiment, passes through the first permeability magnetic material 10a and the second permeability magnetic material
The characteristics of structure of 10b and magnetic material 11 constitutes magnetic circuit, and such magnetic circuit belongs to internal magnetic circuit, internal magnetic type magnetic circuit is that leakage field is small,
It is not interfered vulnerable to external magnetic field.There are certain gap between first permeability magnetic material 10a and the second permeability magnetic material 10b, voice coil 6 is set
In the gap, voice coil 6 is connect with the second vibrating diaphragm 4.First vibrating diaphragm 3 and the second vibrating diaphragm 4 are fastened by screw, 3 He of the first vibrating diaphragm
There are the gap of 1-2mm, flexible 5 one end of flexible joining part between the both sides of the face of second vibrating diaphragm 4 and the open wall of acoustical generator shell 2
It is fastened with the first vibrating diaphragm 3 and the second vibrating diaphragm 4 by screw, the other end passes through the open wall of screw and 2 open end of acoustical generator shell
Fastening, flexible flexible joining part 5 have certain elasticity and toughness, rise and are connecting open wall and the first vibrating diaphragm 3 and the second vibrating diaphragm 4
There is certain elasticity in vertical direction, sealing function and the first vibrating diaphragm 3 of limitation can be played and the second vibrating diaphragm 4 is moving back and forth
Middle amplitude is excessive.Magnetic material 11 using axial charging permanent-magnet material generate magnetic field, magnetic material 11 generate magnetic field via
First permeability magnetic material 10a and the second permeability magnetic material 10b constraint, generates stronger magnetic induction intensity at the gap that voice coil 6 is inserted into.
When the logical upper alternating current of voice coil 6, voice coil 6 is pushed the first vibrating diaphragm 3 and the second vibrating diaphragm 4 by the effect of Lorentz force in magnetostatic field
It is of reciprocating vibration.When underwater acoustical generator vibrates in water, the first vibrating diaphragm 3 and the second vibrating diaphragm 4 push aqueous medium to generate sound wave, will be defeated
The electric energy entered is converted to radiating acoustic energy and goes out.
Embodiment 2
The present embodiment is further improvement on that basis of example 1, as shown in Fig. 2, further include cooling cycle heat exchange pipeline 7,
Pressure-equalizing passageway 8 and solenoid electric valve 9, wherein cooling cycle heat exchange pipeline 7 is around being wrapped on voice coil 6, head and the tail with
The connection of solenoid electric valve 9 forms cooling circuit；8 one end of pressure-equalizing passageway is set to 2 inner bottom of acoustical generator shell, separately
One end connects solenoid electric valve 9；Magnetic material 11 is neodymium iron boron, is capable of providing good magnetism, is arranged inside acoustical generator shell 2
There is magnetic circuit fixed frame 12, described 12 one end of magnetic circuit fixed frame is fixedly connected with the first permeability magnetic material 10a, and the other end is fixedly connected with sounding
The inner wall of device shell 2；It is provided with temperature sensor 14 on second vibrating diaphragm 4, pressure sensor 15 is provided on magnetic circuit fixed frame 12,
Temperature sensor 13 and pressure sensor 14 are connect by the control port 15 being arranged on route and acoustical generator shell 2；Voice coil 6
Coiling multilayer enameled wire posts axially uniformly distributed cooling fin, staggered, heat dissipation between every two layers of cooling fin on every layer of enameled wire
Piece extends and connect with the first vibrating diaphragm 3 and the second vibrating diaphragm 4.
The underwater acoustical generator of low frequency of the present invention is mounted on condenser shell or cloth is placed in the water chamber of condenser.Sound wave
When acting on liquid, dirty layer and condenser equipment pipe wall, since the three is not quite similar for the frequency response of sound wave, thus it is each
It is also asynchronous from the vibration of generation, the relative motion of high speed can be thus generated on the contact surface, and this speed difference is final to show
For the relative shear between dirty layer and condenser equipment tube wall interface, causes layer of scale that fatigue occurs and loosens, that is, reach and remove
The effect of dirt.Due to being low-frequency sound wave, wave length of sound is longer, has more penetration power, what can be propagated is farther, and sphere of action is more
Extensively.
Claims (10)
1. a kind of underwater acoustical generator of low-frequency high-power, which is characterized in that including acoustical generator shell 2, acoustical generator shell 2 opens on one side
Mouthful, the open-mouth is provided with the first vibrating diaphragm 3 and the second vibrating diaphragm 4, is closely connected between the first vibrating diaphragm 3 and the second vibrating diaphragm 4, first
Vibrating diaphragm 3 is set to outside, and the second vibrating diaphragm 4 is set to inside；Acoustical generator shell 2 is internally provided with magnetic material 11, magnetic material
11 outsides are mutually enclosed by the first permeability magnetic material 10a and the second permeability magnetic material 10b, the first permeability magnetic material 10a and the second magnetic conduction
Material 10b forms the gap that can be inserted one end of voice coil 6 on the enclosing face of the second vibrating diaphragm of face 4, voice coil 6 it is another
One end is connect with the second vibrating diaphragm 4；Wherein the open wall of the both sides of the face of the first vibrating diaphragm 3 and the second vibrating diaphragm 4 and acoustical generator shell 2 it
Between there are gap, and the both sides of the face of the first vibrating diaphragm 3 and the second vibrating diaphragm 4 pass through flexible flexible joining part 5 and connect with opening wall.
2. the underwater acoustical generator of low-frequency high-power according to claim 1, which is characterized in that the open-position-side of acoustical generator shell 2
Both ends connecting flange ring 1.
3. the underwater acoustical generator of low-frequency high-power according to claim 1, which is characterized in that the first permeability magnetic material 10a,
Second permeability magnetic material 10b and magnetic material 11 are fixed by binder, and the magnetic material 11 is neodymium iron boron.
4. the underwater acoustical generator of low-frequency high-power according to claim 1, which is characterized in that further include cooling cycle heat exchanger tube
Road 7, pressure-equalizing passageway 8 and solenoid electric valve 9, wherein cooling cycle heat exchange pipeline 7 surround and is wrapped on voice coil 6, head and the tail
It connect to form cooling circuit with solenoid electric valve 9；8 one end of pressure-equalizing passageway is set to 2 inner bottom of acoustical generator shell
End, the other end connect solenoid electric valve 9.
5. the underwater acoustical generator of low-frequency high-power according to claim 1, which is characterized in that it is described flexibility flexible joining part 5 be
Perpendicular to the connection flexible connector in direction.
6. the underwater acoustical generator of low-frequency high-power according to claim 1, which is characterized in that be arranged inside acoustical generator shell 2
There is magnetic circuit fixed frame 12, described 12 one end of magnetic circuit fixed frame is fixedly connected with the first permeability magnetic material 10a, and the other end is fixedly connected with sounding
The inner wall of device shell 2.
7. the underwater acoustical generator of low-frequency high-power according to claim 6, which is characterized in that be provided with temperature on the second vibrating diaphragm 4
Sensor 14 is spent, is provided with pressure sensor 15 on magnetic circuit fixed frame 12, temperature sensor 13 and pressure sensor 14 pass through
The control port 15 being arranged on route and acoustical generator shell 2 is connect.
8. the underwater acoustical generator of low-frequency high-power according to claim 1, which is characterized in that the lead of voice coil 6 and setting exist
Signal port 16 on acoustical generator shell 2 connects.
9. the underwater acoustical generator of low-frequency high-power according to claim 1, which is characterized in that 6 coiling multilayer enameled wire of voice coil,
Axially uniformly distributed cooling fin is posted on every layer of enameled wire.
10. the underwater acoustical generator of low-frequency high-power according to claim 9, which is characterized in that between every two layers of cooling fin staggeredly
Arrangement, cooling fin extend and connect with the second vibrating diaphragm 4.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811391678.1A CN109413542A (en) | 2018-11-21 | 2018-11-21 | A kind of underwater acoustical generator of low-frequency high-power |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811391678.1A CN109413542A (en) | 2018-11-21 | 2018-11-21 | A kind of underwater acoustical generator of low-frequency high-power |
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| CN109413542A true CN109413542A (en) | 2019-03-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811391678.1A Pending CN109413542A (en) | 2018-11-21 | 2018-11-21 | A kind of underwater acoustical generator of low-frequency high-power |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112073861A (en) * | 2020-11-11 | 2020-12-11 | 汉桑（南京）科技有限公司 | Audio equipment |
| CN112073854A (en) * | 2020-08-27 | 2020-12-11 | 瑞声新能源发展(常州)有限公司科教城分公司 | Sound production device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030123692A1 (en) * | 2001-02-26 | 2003-07-03 | Masataka Ueki | Speaker |
| CN102075828A (en) * | 2010-12-06 | 2011-05-25 | 中国船舶重工集团公司第七一五研究所 | Underwater very low frequency (VLF) broadband sound source |
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| CN208956309U (en) * | 2018-11-21 | 2019-06-07 | 南京常荣声学股份有限公司 | A kind of underwater acoustical generator of low-frequency high-power |
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| US20030123692A1 (en) * | 2001-02-26 | 2003-07-03 | Masataka Ueki | Speaker |
| CN1462565A (en) * | 2001-02-26 | 2003-12-17 | 优异塔克斯株式会社 | Loudspeaker |
| CN102075828A (en) * | 2010-12-06 | 2011-05-25 | 中国船舶重工集团公司第七一五研究所 | Underwater very low frequency (VLF) broadband sound source |
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| CN208956309U (en) * | 2018-11-21 | 2019-06-07 | 南京常荣声学股份有限公司 | A kind of underwater acoustical generator of low-frequency high-power |
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| CN112073854A (en) * | 2020-08-27 | 2020-12-11 | 瑞声新能源发展(常州)有限公司科教城分公司 | Sound production device |
| CN112073861A (en) * | 2020-11-11 | 2020-12-11 | 汉桑（南京）科技有限公司 | Audio equipment |
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