CN207968788U - Tablet microphone - Google Patents
Tablet microphone Download PDFInfo
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- CN207968788U CN207968788U CN201820460257.9U CN201820460257U CN207968788U CN 207968788 U CN207968788 U CN 207968788U CN 201820460257 U CN201820460257 U CN 201820460257U CN 207968788 U CN207968788 U CN 207968788U
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- microphone
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- web plate
- tablet
- plate
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Abstract
The utility model is related to a kind of tablet microphones, including capacitance sound head（1）And microphone main body, capacitance sound head（1）Embedded in the center of microphone main body, the microphone main body uses two vertical plates body structure, and the front apron in the two vertical plates body structure uses porous plate web plate（2）, porous plate web plate（2）Rear end be a cavity（5）, porous plate web plate（2）With cavity（5）Between be equipped with sound-absorbing material（4）, porous plate web plate（2）As fixed frame, fixing internal sound-absorbing material（4）, cavity（5）Rear end side wall be equipped with metal slot fixed plate（7）.The tablet microphone of the utility model, structure novel, optimum performance, significant effect can be played in the occasion of no Acoustic treatment or poor Acoustic treatment by having.
Description
Technical field
The utility model is related to sound equipment equipment technology field, specifically a kind of tablet microphone.
Background technology
Show profession capacitance microphone in the room of no Acoustic treatment in use, the too many room reflections sound of typing, causes
Through sound source cannot be clearly recorded, excessive reflected sound can make the source of sound entirely recorded smudgy, and when post-production can not
Remove reflected sound.
Invention content
The purpose of this utility model is that enable professional capacitance microphone in no Acoustic treatment or poor Acoustic treatment
Occasion plays optimum performance, in conjunction with principle the being made into one Combined microphone of sE acoustic filterings, the signal of this microphone structure
Figure.
To achieve the above object, a kind of tablet microphone is designed, which is characterized in that including capacitance sound head 1 and microphone
Main body, capacitance sound head 1 are embedded in the center of microphone main body, and the microphone main body uses two vertical plates body structure, described perpendicular
Front apron in straight tablet body structure uses porous plate web plate 2, and the rear end of porous plate web plate 2 is a cavity 5, porous plate web plate
Sound-absorbing material 4 is equipped between 2 and cavity 5, porous plate web plate 2 is used as fixed frame, fixing internal sound-absorbing material 4, after cavity 5
End side wall is equipped with metal slot fixed plate 7.
3 associated layer of the first wool felt is attached between the porous plate web plate 2 and sound-absorbing material 4.
3 associated layer of the second wool felt is attached between the cavity 5 and metal slot fixed plate 7.
Capacitance sound head 1 is embedded in the center of tablet body structure.
The sound-absorbing material 4 is using environmentally friendly mineral wool or acoustics sponge 4.
2 open-work rate of the porous plate web plate is up to 49.15%.
For the porous plate web plate 2 using the porous aluminum web plate of 1mm thickness, punching rate, which takes in 103*103mm, 460
3.8mm hole.
The tablet microphone of the utility model, structure novel, having can be in the field of no Acoustic treatment or poor Acoustic treatment
It closes and plays optimum performance, significant effect.
Description of the drawings
Fig. 1 is tablet microphone structure schematic diagram
Description of symbols in figure
1 capacitance sound head, 2 porous plate web plates, 3 first wool felts, 4 sound-absorbing materials, 5 cavitys, 6 second wool felts, 7 metallic channels
Hole fixed plate.
Specific implementation mode
The technical solution of the utility model is further elaborated in conjunction with accompanying drawings and embodiments, it is believed that art technology
It is clear for personnel.
The participation of reflected sound is also had, when anti-other than receiving direct sound wave using microphone location usually in a room
Penetrate sound it is identical with through acoustic frequency when will produce interference phenomenon, after superposition the case where sound wave, depend on the phase of the outer sound wave of microphone
Position relationship,
Wherein, P1：0 ° of direction incident sound pressure
P2：180 ° of direction reflecting acoustic pressures
：Acoustic pressure after synthesis
ω：Angular frequency
φ：Direct sound wave and reflected sound phase difference
t :Delay time
When phase=0 ° of direct sound wave and reflected sound difference, the amplitude for changing frequency can be made to increase by 1 times, otherwise φ=180 ° are just
It just mutually keeps out, so wanting the characteristic in removal room it is necessary to think that method eliminates reflected sound.
As shown in Figure 1, acoustical material and capacitance sound head 1 are effectively bonded together, when sound source is along 0 ° of microphone axis
When direction is propagated, microphone diameter d=320mm
As d >=λ, when the size ratio wavelength of microphone is much larger, sound wave can penetrate the acoustical material in microphone, make acoustic energy
It gradually is converted into thermal energy, the energy for sound wave of decaying, the acoustic energy not being consumed completely can continue to propagate through ZERO, rigid when meeting
Wall back reflection continues to reach sound head 1 after remaining little through microphone to 180 ° of directions of microphone.
As d≤λ, when size≤wavelength of microphone, sound wave can bypass microphone continuation and propagate forward.
It being found by above conclusion, the frequency of sound wave that microphone can influence is 1062Hz---20KHz,
Effect per layer material：
As shown in Figure 1,
Cavity 5 is remained after environmentally friendly mineral wool or acoustics sponge 4, is coordinated with the sound-resistance material of front, centering low frequency has suction
Sound acts on.Absorb sound frequency：
Wherein description of symbols：
fo：Absorption frequency,
M0：The surface density of acoustical material before cavity（Kg/㎡）
L：Air layer thickness before cavity（cm）
ρ：Atmospheric density
C：THE VELOCITY OF SOUND IN AIR
K：Rigidity factor
The characteristic of fixing internal acoustical material is played, it is another not influence the reflection of sound wave, using 2 open-work rate of porous plate web plate
Up to 49.15%, as fixed frame.
The punching rate ρ of porous aluminum web plate used at present0, taking in 103*103mm has 460 holes 3.8mm
1.92=11.3354mm2 of single hole area S=π *
P0=
The aluminium net plate of 1mm thickness used at present does the perforation structure design of sound wave, small because damping, to obtain resonance sound-absorbing
Peak is relatively flat, the sound-absorbing material of the special filling multilayer different densities on perforation web plate, because of the mesh of 3.8mm, 1mm thickness
Plate itself damps smaller, sound-absorbing material need to be added, after the porous sound-absorbing material of multilayer different densities is tightly attached to perforated plate
Face, as shown below：
When sound wave is when across porous plate web plate 2, streamline focuses at 2 one apertures of porous plate web plate, passes through porous plate
Streamline is restored to former distribution again after web plate 2, and the intensive place's particle of streamline excessively increases, using the sound-absorbing material 4 of filter densities,
Cavity 5 and 6 second wool felt of sound-absorbing material for being close to 7 inside of metal slot fixed plate, make it generate big damping, sound-absorbing material
It is sound absorption structure in parallel with metal slot fixed plate 7, can works respectively, sound sucting band can be apparent broadening.
Since the surface of mineral wool or acoustics sponge 4 has high frequency reflection, increase to reduce its surface where high frequency reflection
Add the wool felt material (3) (6) of the high entrant sound rate of one layer of low-density.
Claims (7)
1. a kind of tablet microphone, which is characterized in that including capacitance sound head（1）And microphone main body, capacitance sound head（1）It is embedded in
The center of microphone main body, the microphone main body uses two vertical plates body structure, in the two vertical plates body structure
Front apron uses porous plate web plate（2）, porous plate web plate（2）Rear end be a cavity（5）, porous plate web plate（2）With cavity（5）
Between be equipped with sound-absorbing material（4）, porous plate web plate（2）As fixed frame, fixing internal sound-absorbing material（4）, cavity（5）After
End side wall is equipped with metal slot fixed plate（7）.
2. a kind of tablet microphone as described in claim 1, which is characterized in that the porous plate web plate（2）With sound-absorbing material
（4）Between be attached with the first wool felt（3）Associated layer.
3. a kind of tablet microphone as described in claim 1, which is characterized in that the cavity（5）With metal slot fixed plate
（7）Between be attached with the second wool felt（3）Associated layer.
4. a kind of tablet microphone as described in claim 1, which is characterized in that capacitance sound head（1）Embedded in tablet body structure
Center.
5. a kind of tablet microphone as described in claim 1, which is characterized in that the sound-absorbing material（4）Using environmentally friendly glass
Cotton or acoustics sponge（4）.
6. a kind of tablet microphone as described in claim 1, which is characterized in that the porous plate web plate（2）Open-work rate reaches
49.15%。
7. a kind of tablet microphone as described in claim 1, which is characterized in that the porous plate web plate（2）Using 1mm thickness
The porous aluminum web plate of degree, punching rate, which takes in 103*103mm, 460 holes 3.8mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820460257.9U CN207968788U (en) | 2018-04-03 | 2018-04-03 | Tablet microphone |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820460257.9U CN207968788U (en) | 2018-04-03 | 2018-04-03 | Tablet microphone |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207968788U true CN207968788U (en) | 2018-10-12 |
Family
ID=63726894
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820460257.9U Active CN207968788U (en) | 2018-04-03 | 2018-04-03 | Tablet microphone |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207968788U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110856064A (en) * | 2019-11-27 | 2020-02-28 | 内蒙古农业大学 | Livestock feeding sound signal acquisition device and acquisition method using same |
-
2018
- 2018-04-03 CN CN201820460257.9U patent/CN207968788U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110856064A (en) * | 2019-11-27 | 2020-02-28 | 内蒙古农业大学 | Livestock feeding sound signal acquisition device and acquisition method using same |
| CN110856064B (en) * | 2019-11-27 | 2021-06-04 | 内蒙古农业大学 | Livestock feeding sound signal acquisition device and acquisition method using same |
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