CN206835377U - Loudspeaker test device and loudspeaker test equipment - Google Patents
Loudspeaker test device and loudspeaker test equipment Download PDFInfo
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- CN206835377U CN206835377U CN201720659719.5U CN201720659719U CN206835377U CN 206835377 U CN206835377 U CN 206835377U CN 201720659719 U CN201720659719 U CN 201720659719U CN 206835377 U CN206835377 U CN 206835377U
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- loudspeaker
- power amplifier
- piezoelectric ceramic
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Abstract
The utility model provides a kind of loudspeaker test device and loudspeaker test equipment, is related to the technical field of electronic component detection, and loudspeaker test device includes audio input device, power amplifier and multiple loudspeaker incoming ends；Power amplifier electrically connects with audio input device, and multiple loudspeaker incoming ends electrically connect with power amplifier；Power amplifier is used to amplify the audio signal of audio input device；Multiple loudspeaker incoming ends are used to electrically connect with multiple piezoelectric ceramic loudspeakers respectively.In use, the sound that user can be sent by listening to each piezoelectric ceramic loudspeaker, best one piezoelectric ceramic loudspeaker of tone color is selected, this specific audio signal is directed to so as to select, the piezoelectric ceramic loudspeaker of best results, you can determine most suitable size.
Description
Technical field
Electronic component detection technique field is the utility model is related to, more particularly, to a kind of loudspeaker test device and is raised one's voice
Device test equipment.
Background technology
Piezoelectric ceramic loudspeaker is a kind of function element for electric signal being changed into acoustical signal.Nineteen nineties
Just, the appearance of piezoelectric ceramic loudspeaker generates serious impact to electrodynamic type coil loud speaker.Due to piezoelectric ceramic loudspeaker
Without magnetic circuit and voice coil loudspeaker voice coil, therefore it enjoys more design spaces in volume, and this is also that piezoelectric ceramic loudspeaker is extensive
One of major reason of concern and application.Piezoelectric ceramic loudspeaker is mainly inverse by the piezoelectric ceramic piece generation of inside loudspeakers
Piezo-electric effect realizes a kind of electroacoustic translation function device mutually changed between electricity and acoustics.Because it has ultra-thin thickness
Degree, simple structure, without electromagnetic interference, ultralow power consumption the advantages that, piezoelectric ceramic loudspeaker gradually portable is disappeared by numerous
Expense electronic product is favored, and is widely used in portable mobile terminal equipment, and turns into loudspeaker competitive field
Outstanding person.
The basic functional principle of piezoelectric ceramic loudspeaker is that electric signal is transformed into mechanical signal, make piezoelectric ceramic piece and
Metallic membrane vibrates, and drives the air on periphery to vibrate, air is sent sound, so as to realize between " electricity-power-sound "
Energy conversion.Relative to conventional coil loudspeaker, it does piezoelectric ceramic loudspeaker in thickness, service life, power consumption, electromagnetic field
Disturb, cost of manufacture etc. has great advantage.
At present, in high-fidelity music center field, frequently with piezoelectric ceramic loudspeaker as loudspeaker, but piezoelectric ceramics is raised
The equipment of the special reliability testing of sound device still has blank.Because its influence of performance quality to tonequality is very big.Therefore, such as
What can be directed to specific audio signal, select the piezoelectric ceramic loudspeaker of most suitable size, and this problems demand solves.
Utility model content
The purpose of this utility model is to provide a kind of loudspeaker test device and loudspeaker test equipment, existing to improve
Having does not have a kind of equipment of reliability testing present in technology, can be directed to specific audio signal, select most suitable
The technical problem of the piezoelectric ceramic loudspeaker of size.
Loudspeaker test device provided by the utility model, including audio input device, power amplifier and multiple raise one's voice
Device incoming end；Power amplifier electrically connects with audio input device, and multiple loudspeaker incoming ends electrically connect with power amplifier；Work(
Rate amplifier is used to amplify the audio signal of audio input device；Multiple loudspeaker incoming ends be used for respectively with multiple piezoelectric ceramics
Loudspeaker electrically connects.
Further, loudspeaker test device also includes selecting switch；Selecting switch respectively with power amplifier and multiple
Loudspeaker incoming end electrically connects, for by the circuit communication of loudspeaker incoming end and power amplifier or disconnection.
Further, loudspeaker test device also includes adjusting switch；Adjusting switch respectively with power amplifier and audio
Loader electrically connects, and is inputted for adjusting from audio input device to the volume of the audio signal of power amplifier.
Further, loudspeaker test device also includes Current Voltage detector；Stream Voltage detector is put with power respectively
Big device and loudspeaker incoming end electrical connection, for detecting the electric current and electricity of circuit between power amplifier and loudspeaker incoming end
Pressure.
Further, loudspeaker test device also includes decibel value detector；Decibel value detector is used to detect piezoelectricity pottery
Porcelain loudspeaker sends the decibel value of sound.
Further, loudspeaker test device also includes fixture and the multiple installation portions being arranged on fixture；It is more
Individual loudspeaker incoming end is arranged on fixture；Multiple installation portions are used to multiple piezoelectric ceramic loudspeakers be fixedly mounted respectively.
Further, installation portion is the installation neck that piezoelectric ceramic loudspeaker is set for card.
Further, loudspeaker test device also includes shell；Shell is located at outside audio input device and power amplifier.
Further, it is provided with fixed pedestal on the inwall of shell；Power amplifier and audio input device are and fixed base
Seat is fixedly connected.
Further, the utility model additionally provides a kind of loudspeaker test equipment, and loudspeaker test equipment includes frequency
Detector and loudspeaker test device.
Loudspeaker test device provided by the utility model, in use, audio input device export specific audio
Signal, and it is transferred to power amplifier；Power amplifier is transferred to multiple loudspeaker incoming ends after audio signal is amplified.Use
After various sizes of piezoelectric ceramic loudspeaker is linked into multiple loudspeaker incoming ends by person, multiple piezoelectric ceramic loudspeakers can be sent out
Go out sound.Because the size of multiple piezoelectric ceramic loudspeakers differs, therefore the sound that each piezoelectric ceramic loudspeaker is sent
Tone color is also different.The sound that user can send by listening to each piezoelectric ceramic loudspeaker, select best one pressure of tone color
Electroceramics loudspeaker, this specific audio signal, the piezoelectric ceramic loudspeaker of best results are directed to so as to select, you can really
Make most suitable size.
Brief description of the drawings
, below will be right in order to illustrate more clearly of the utility model embodiment or technical scheme of the prior art
The required accompanying drawing used is briefly described in embodiment or description of the prior art, it should be apparent that, describe below
In accompanying drawing be some embodiments of the present utility model, for those of ordinary skill in the art, do not paying creativeness
On the premise of work, other accompanying drawings can also be obtained according to these accompanying drawings.
Fig. 1 is the structural representation for the loudspeaker detection means that the utility model embodiment provides；
Fig. 2 is the part-structure schematic diagram for the loudspeaker detection means that the utility model embodiment provides；
Fig. 3 is the part-structure schematic diagram of the piezoelectric ceramic loudspeaker shown in Fig. 1；
Fig. 4 is the part-structure schematic diagram for the loudspeaker detection means that another embodiment of the utility model provides.
Icon：1- audio input devices；2- power amplifiers；3- loudspeaker incoming ends；4- piezoelectric ceramic loudspeakers；5- is selected
Switch；6- adjusting switch；7- Current Voltage detectors；8- fixtures；9- installation portions；10- installs neck；11- bottom plates；12- is recessed
Groove；Electrode in 13-；21- power amplifier elements；22- power supplys；91- supports；92- fixed card buckles.
Embodiment
The technical solution of the utility model is clearly and completely described below in conjunction with accompanying drawing, it is clear that described
Embodiment is the utility model part of the embodiment, rather than whole embodiments.Based on the embodiment in the utility model, sheet
The every other embodiment that field those of ordinary skill is obtained under the premise of creative work is not made, belongs to this practicality
Novel protected scope.
, it is necessary to explanation in description of the present utility model, such as occur term " " center ", " on ", " under ", " left side ",
" right side ", " vertical ", " level ", " interior ", " outer " etc., orientation or position relationship indicated by it be based on orientation shown in the drawings or
Position relationship, it is for only for ease of description the utility model and simplifies description, rather than indicates or imply signified device or member
Part must have specific orientation, with specific azimuth configuration and operation, therefore it is not intended that to limitation of the present utility model.
In addition, such as there is term " first ", " second ", " the 3rd " are only used for describing purpose, and it is not intended that instruction or implying relative
Importance.
, it is necessary to which explanation, unless otherwise clearly defined and limited, term " are pacified in description of the present utility model
Dress ", " connected ", " connection " should be interpreted broadly, for example, it may be fixedly connected or be detachably connected, or integratedly
Connection；Can be mechanical connection or electrical connection；Can be joined directly together, can also be indirectly connected by intermediary,
It can be the connection of two element internals.For the ordinary skill in the art, above-mentioned art can be understood with concrete condition
Concrete meaning of the language in the utility model.
Fig. 1 is the structural representation for the loudspeaker detection means that the utility model embodiment provides；As shown in figure 1, this reality
The loudspeaker test device of example offer, including audio input device 1, power amplifier 2 and multiple loudspeaker incoming ends 3 are provided；Work(
Rate amplifier 2 electrically connects with audio input device 1, and multiple loudspeaker incoming ends 3 electrically connect with power amplifier 2；Power amplification
Device 2 is used to amplify the audio signal of audio input device 1；Multiple loudspeaker incoming ends 3 are used to raise with multiple piezoelectric ceramics respectively
Sound device 4 electrically connects.
Wherein, the type of audio input device 1 can be it is a variety of, such as：Mobile phone, tablet personal computer and radio etc..
Further, power amplifier 2 should include power amplifier element 21 and power supply 22, and power supply 22 is electrically connected with power amplifier element 21
Connect, in use, power supply 22 is used to power to power amplifier element 21, and one end and the audio input device 1 of power amplifier element 21 are electrically connected
Connect, the other end electrically connects with multiple loudspeaker incoming ends 3, for amplifying and being transferred to more the audio signal of audio input device 1
Individual loudspeaker incoming end 3.
Further, multiple loudspeaker incoming ends 3 should electrically connect with various sizes of piezoelectric ceramic loudspeaker 4.
The loudspeaker test device that the present embodiment provides, in use, audio input device 1 export specific audio letter
Number, and it is transferred to power amplifier 2；Power amplifier 2 is transferred to multiple loudspeaker incoming ends 3 after audio signal is amplified.Make
After various sizes of piezoelectric ceramic loudspeaker 4 is linked into multiple loudspeaker incoming ends 3 by user, multiple piezoelectric ceramic loudspeakers 4
Sound can be sent.Because the size of multiple piezoelectric ceramic loudspeakers 4 differs, therefore each piezoelectric ceramic loudspeaker 4 is sent out
The sound timbre gone out is also different.The sound that user can send by listening to each piezoelectric ceramic loudspeaker 4, select tone color best
A piezoelectric ceramic loudspeaker 4, be directed to this specific audio signal so as to select, the piezoelectric ceramics of best results is raised one's voice
Device 4, you can determine most suitable size.
As shown in figure 1, on the basis of above-described embodiment, further, loudspeaker test device also includes selecting switch
5；Selecting switch 5 electrically connects with power amplifier 2 and multiple loudspeaker incoming ends 3 respectively, for by loudspeaker incoming end 3 and work(
The circuit communication of rate amplifier 2 or disconnection.
Wherein, can be connected in parallel between multiple loudspeaker incoming ends 3.In use, user is by audio input
Device 1 electrically connects with power amplifier 2, the audio signal access of audio input device 1；Then user will be more by selecting switch 5
Individual loudspeaker incoming end 3 electrically connects with power amplifier 2 respectively, so as to make multiple piezoelectric ceramic loudspeakers 4 send sound respectively,
Can tell wherein has the piezoelectric ceramic loudspeaker 4 of optimal tone color, and the size of the piezoelectric ceramic loudspeaker 4 is to be directed to
The most suitable size of this specific audio signal.
Further, user can also divide multiple piezoelectric ceramic loudspeakers 4 for some groups, be divided by selecting switch 5
Loudspeaker incoming end 3 corresponding to every group is not electrically connected with power amplifier 2, so as to make every group of piezoelectric ceramic loudspeaker 4 same
When send sound, you can tell one group of piezoelectric ceramic loudspeaker 4 of optimal tone color, the piezoelectric ceramic loudspeaker 4 of the group
Size is the most suitable packet size for this specific audio signal.
In the present embodiment, loudspeaker test device also includes selecting switch 5.In use, selecting switch 5 is used to incite somebody to action
Circuit communication or disconnection of the loudspeaker incoming end 3 with power amplifier 2.When circuit communication, corresponding to loudspeaker incoming end 3
Piezoelectric ceramic loudspeaker 4 sends sound, when a circuit is open.Piezoelectric ceramic loudspeaker 4 can not be sent out corresponding to loudspeaker incoming end 3
Go out sound.The setting of selecting switch 5 can make user want the piezoelectricity listened to according to sense of hearing hobby or actual demand, selection
The sound of ceramic loudspeaker 4, so it is more convenient for identifying, and the accuracy of judgement can be improved.
As shown in figure 1, on the basis of above-described embodiment, further, loudspeaker test device also includes adjusting switch
6；Adjusting switch 6 electrically connects with power amplifier 2 and audio input device 1 respectively, is inputted for adjusting from audio input device 1 to work(
The volume of the audio signal of rate amplifier 2.
In the present embodiment, in use, user can be inputted by adjusting switch 6 to control from audio input device 1
To the volume of the audio signal of power amplifier 2, so as to adjust the size for the sound that piezoelectric ceramic loudspeaker 4 is sent.Adjust
The setting of section switch 6 can make user according to surrounding environment, to change the size for the sound that piezoelectric ceramic loudspeaker 4 is sent,
It is easy to not hear the tone color situation of various sizes of piezoelectric ceramic loudspeaker 4, it is convenient to identify, improve the accuracy of judgement.
As shown in figure 1, on the basis of above-described embodiment, further, loudspeaker test device also includes Current Voltage
Detector 7；Stream Voltage detector electrically connects with power amplifier 2 and loudspeaker incoming end 3 respectively, for detecting power amplifier
The electric current and voltage of circuit between 2 and loudspeaker incoming end 3.
In the present embodiment, loudspeaker test device also includes Current Voltage detector 7, and Current Voltage detector 7 is used to examine
The electric current and voltage of circuit between measurement of power rate amplifier 2 and loudspeaker incoming end 3.In use, when power amplifier 2
During circuit communication between loudspeaker incoming end 3, current electric current and voltage can be shown on Current Voltage detector 7；Work as work(
, can not display data or display on Current Voltage detector 7 when circuit between rate amplifier 2 and loudspeaker incoming end 3 disconnects
Data are zero.This set can make whether the timely discovery circuit of user connects, and whether there is damage, and device being capable of normal operation.
On the basis of above-described embodiment, further, loudspeaker test device also includes decibel value detector；Decibel value
Detector is used to detect the decibel value that piezoelectric ceramic loudspeaker 4 sends sound.
Wherein, decibel value detector should be arranged on close proximity to the position of piezoelectric ceramic loudspeaker 4, can so reduce the external world
The interference of environment.
In the present embodiment, in use, when piezoelectric ceramic loudspeaker 4 sends sound, decibel value detector can
Show that current piezoelectric ceramic loudspeaker 4 sends the decibel value of sound, be easy to user to understand current piezoelectric ceramic loudspeaker 4 and send
The size of sound.
Fig. 2 is the part-structure schematic diagram for the loudspeaker detection means that the utility model embodiment provides；Fig. 3 is Fig. 1 institutes
The part-structure schematic diagram of the piezoelectric ceramic loudspeaker shown；As shown in Figures 2 and 3, on the basis of above-described embodiment, further
, loudspeaker test device also includes fixture 8 and the multiple installation portions 9 being arranged on fixture 8；Multiple loudspeaker accesses
End 3 is arranged on fixture 8；Multiple installation portions 9 are used to multiple piezoelectric ceramic loudspeakers 4 be fixedly mounted respectively.
Wherein, interior electrode 13 is provided with piezoelectric ceramic loudspeaker 4, interior electrode 13 electrically connects with loudspeaker incoming end 3.
Further, loudspeaker detection means can also include bottom plate 11；Fixture 8 can be fixed plate, and fixed plate is solid
Surely it is arranged on one end of the upper surface of bottom plate 11；Multiple loudspeaker incoming ends 3 are arranged in fixed plate, piezoelectric ceramic loudspeaker 4
Simultaneously the upper surface with bottom plate 11 abuts.
Further, installation portion 9 can include support 91 and fixed card buckle 92.Support 91 and the fixation of fixed card buckle 92 are set
Put in the upper surface of bottom plate 11.Support 91 abuts with the one end of piezoelectric ceramic loudspeaker 4 away from loudspeaker incoming end 3, for limiting
The motion of piezoelectric ceramic loudspeaker 4 processed along a first direction.Wherein first direction is that support 91 abuts with piezoelectric ceramic loudspeaker 4
One end and loudspeaker incoming end 3 line direction.One end of fixed card buckle 92 is be hinged with bottom plate 11, and the other end is used to be pressed in
One side of the electroceramics loudspeaker 4 away from bottom plate 11, bottom plate 11 and fixed card buckle 92 coordinate to limit piezoelectric ceramic loudspeaker 4 along
Move in two directions.Wherein second direction is perpendicular to the direction of the upper surface of piezoelectric ceramic loudspeaker 4.In use, use
Piezoelectric ceramic loudspeaker 4 is placed on bottom plate 11 by person, makes the interior electrode 13 and loudspeaker incoming end 3 of piezoelectric ceramic loudspeaker 4
Electrical connection, and one end of piezoelectric ceramic loudspeaker 4 is abutted with support 91；Then fixed card buckle 92 is adjusted, makes fixed card buckle 92
One end be pressed in the one side of piezoelectric ceramic loudspeaker 4, so as to fix piezoelectric ceramic loudspeaker 4.
Further, fixed card buckle 92 may be configured as multiple.Piezoelectric ceramic loudspeaker 4 can so be fixed more steady
It is fixed.
In the present embodiment, loudspeaker test device includes fixture 8 and multiple installation portions 9.In use, it is multiple
Piezoelectric ceramic loudspeaker 4 is separately fixed on multiple installation portions 9, and piezoelectric ceramic loudspeaker 4 is raised one's voice with multiple on fixture 8
Device incoming end 3 electrically connects, to ensure the connection of circuit, so as to make piezoelectric ceramic loudspeaker 4 send sound.Fixture 8 and multiple
It is more stable that the setting of installation portion 9 can make piezoelectric ceramic loudspeaker 4 be connected with loudspeaker incoming end 3, ensures device just
Often operation.
Fig. 4 is the part-structure schematic diagram for the loudspeaker detection means that another embodiment of the utility model provides, such as Fig. 4 institutes
Show, on the basis of above-described embodiment, further, installation portion 9 is the installation neck that piezoelectric ceramic loudspeaker 4 is set for card
10。
Wherein, groove 12 is also provided with installation portion 9, groove 12 is arranged on the edge on one side of installation neck 10.
In use, when user needs to take out piezoelectric ceramic loudspeaker 4 from installation neck 10, finger can be placed in groove
At 12, firmly one end of piezoelectric ceramic loudspeaker 4 is lifted upwards, then taken out whole piezoelectric ceramic loudspeaker 4.Groove 12
Setting can convenient use person by piezoelectric ceramic loudspeaker 4 from installation neck 10 in take out.
In the present embodiment, installation neck 10 set piezoelectric ceramic loudspeaker 4 for card, this set is simple to operate, cost compared with
It is low.
On the basis of above-described embodiment, further, loudspeaker test device also includes shell；Shell is located at audio
Outside loader 1 and power amplifier 2.
In the present embodiment, in use, audio input device 1 and power amplifier 2 are arranged at the inside of shell, use
In protection audio input device 1 and power amplifier 2.
On the basis of above-described embodiment, further, fixed pedestal is provided with the inwall of shell；Power amplifier 2
It is fixedly connected with audio input device 1 with fixed pedestal.
Wherein, the set location of fixed pedestal can be it is a variety of, such as：On the madial wall of shell or shell inner bottom wall
On.
In the present embodiment, in use, audio input device 1 and power amplifier 2 are fixedly connected with fixed pedestal,
This set can make the more stable of audio input device 1 and power amplifier 2 and cage connection.
On the basis of above-described embodiment, further, the utility model embodiment additionally provides a kind of loudspeaker test
Equipment, loudspeaker test equipment include frequency tester and loudspeaker test device.
In the present embodiment, in use, audio input device 1 exports specific audio signal, and is transferred to power and puts
Big device 2；Power amplifier 2 is transferred to multiple loudspeaker incoming ends 3 after audio signal is amplified.User is by various sizes of pressure
After electroceramics loudspeaker 4 is linked into multiple loudspeaker incoming ends 3, multiple piezoelectric ceramic loudspeakers 4 can send sound.Due to more
The size of individual piezoelectric ceramic loudspeaker 4 differs, therefore the sound timbre that each piezoelectric ceramic loudspeaker 4 is sent is also different.
The sound that user can send by listening to each piezoelectric ceramic loudspeaker 4, best one piezoelectric ceramics of tone color is selected to raise one's voice
Device 4, this specific audio signal, the piezoelectric ceramic loudspeaker 4 of best results, you can determine most suitable are directed to so as to select
The size of conjunction.Frequency tester can measure the frequency for the sound that current piezoelectric ceramic loudspeaker 4 is sent, so as to user
Obtain parameter that more can be for reference.
Finally it should be noted that：Various embodiments above is only to illustrate the technical solution of the utility model, rather than it is limited
System；Although the utility model is described in detail with reference to foregoing embodiments, one of ordinary skill in the art should
Understand：It can still modify to the technical scheme described in foregoing embodiments, either to which part or whole
Technical characteristic carries out equivalent substitution；And these modifications or replacement, the essence of appropriate technical solution is departed from this practicality newly
The scope of each embodiment technical scheme of type.
Claims (10)
- A kind of 1. loudspeaker test device, it is characterised in that including：Audio input device, power amplifier and multiple loudspeakers Incoming end；The power amplifier electrically connects with the audio input device, multiple loudspeaker incoming ends with the power amplification Device electrically connects；The power amplifier is used to amplify the audio signal of the audio input device；Multiple loudspeaker accesses Hold for being electrically connected respectively with multiple piezoelectric ceramic loudspeakers.
- 2. loudspeaker test device according to claim 1, it is characterised in that also including selecting switch；The selecting switch electrically connects with the power amplifier and multiple loudspeaker incoming ends respectively, for being raised described Circuit communication or disconnection of the sound device incoming end with the power amplifier.
- 3. loudspeaker test device according to claim 1, it is characterised in that also including adjusting switch；The adjusting switch electrically connects with the power amplifier and the audio input device respectively, for adjusting from the audio Loader inputs the volume of the audio signal to the power amplifier.
- 4. loudspeaker test device according to claim 1, it is characterised in that also including Current Voltage detector；The stream Voltage detector electrically connects with the power amplifier and the loudspeaker incoming end respectively, described for detecting The electric current and voltage of circuit between power amplifier and the loudspeaker incoming end.
- 5. loudspeaker test device according to claim 1, it is characterised in that also including decibel value detector；The decibel value detector is used to detect the decibel value that piezoelectric ceramic loudspeaker sends sound.
- 6. loudspeaker test device according to claim 1, it is characterised in that also including fixture and be arranged on described Multiple installation portions on fixture；Multiple loudspeaker incoming ends are arranged on the fixture；Multiple installation portions are multiple for being fixedly mounted respectively Piezoelectric ceramic loudspeaker.
- 7. loudspeaker test device according to claim 6, it is characterised in that the installation portion is to set piezoelectricity pottery for card The installation neck of porcelain loudspeaker.
- 8. according to the loudspeaker test device described in claim any one of 1-7, in addition to shell；The shell is located at outside the audio input device and the power amplifier.
- 9. loudspeaker test device according to claim 8, it is characterised in that be provided with fixation on the inwall of the shell Pedestal；The power amplifier and the audio input device are fixedly connected with the fixed pedestal.
- 10. a kind of loudspeaker test equipment, it is characterised in that including frequency tester and as described in claim any one of 1-9 Loudspeaker test device.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720659719.5U CN206835377U (en) | 2017-06-07 | 2017-06-07 | Loudspeaker test device and loudspeaker test equipment |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720659719.5U CN206835377U (en) | 2017-06-07 | 2017-06-07 | Loudspeaker test device and loudspeaker test equipment |
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| CN206835377U true CN206835377U (en) | 2018-01-02 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106998524A (en) * | 2017-06-07 | 2017-08-01 | 盐城工学院 | Loudspeaker test device and loudspeaker test equipment |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106998524A (en) * | 2017-06-07 | 2017-08-01 | 盐城工学院 | Loudspeaker test device and loudspeaker test equipment |
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