CN204697266U - Audio amplifier - Google Patents
Audio amplifier Download PDFInfo
- Publication number
- CN204697266U CN204697266U CN201520311994.9U CN201520311994U CN204697266U CN 204697266 U CN204697266 U CN 204697266U CN 201520311994 U CN201520311994 U CN 201520311994U CN 204697266 U CN204697266 U CN 204697266U
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- CN
- China
- Prior art keywords
- audio amplifier
- loud speaker
- phase
- passive radiator
- chamber
- Prior art date
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Abstract
The utility model discloses a kind of audio amplifier, comprise casing, dividing plate, loud speaker, passive radiator and phase-reversing tube is comprised in casing, described casing is divided into the first chamber, side and the second chamber, side by dividing plate, described passive radiator is installed on dividing plate, described loud speaker is installed on the side plate of the casing for the formation of described first chamber, side, and described phase-reversing tube is installed on the side of the casing for the formation of described second chamber, side.The utility model provides a kind of response that can promote low frequency, can reduce again the audio amplifier of the playback lower limit of low frequency.
Description
Technical field
The utility model relates to stereo set field, particularly relates to audio amplifier.
Background technology
In acoustic product, traditional audio amplifier is designed with three kinds: closed audio amplifier, phase inverted cabinet and passive radiator audio amplifier.Refer to accompanying drawing 1 to Fig. 3, be respectively the schematic diagram of these three kinds of traditional audio amplifiers.
The design of often kind of audio amplifier is different, and acoustical quality is individual not identical yet, and cost is also not identical.Under identical cavity volume, all there is certain defect in three kinds of traditional audio amplifier designs.
Shown in Figure 1, closed audio amplifier by the forward radiation sound wave of loud speaker 61 and backward radiation sound wave completely isolated, acoustic short circuit can be avoided to cause low frequency to weaken, but, closed audio amplifier needs cavity volume consistent with the equivalent volume Vas in the TS parameter of loud speaker 61 usually, otherwise the equivalent mechanical resistance of low frequency entire amount sense inside can be caused to increase, thus causes the low frequency reproduction lower limit of audio amplifier to raise, low-frequency range Frequency Response is deteriorated, and cannot obtain good bass and experience.And in prior art, to strengthen the entire amount sense of closed audio amplifier low frequency, DSP (Digital Signal Processor must be increased by front end, digital signal processor) electrical property of low frequency is adjusted, significantly promote the frequency response of low-frequency range, but increase the significantly increase that DSP can bring cost.
Shown in Figure 2, phase inverted cabinet utilizes Helmholz resonance principle, by loud speaker 62 backward radiation sound wave after phase-reversing tube paraphase, outlet sound mouth is radiated loud speaker 62 front, with the forward radiation sound wave in-phase stacking of loud speaker 62, thus obtain the low frequency reproduction lower limit lower than closed audio amplifier.But, the Q value (be also called damping coefficient) of phase inverted cabinet to loud speaker has strict condition restriction, the characteristic of the good phase inverting box of specific Q value competence exertion, simultaneously, phase inverting box is due to the existence of phase-reversing tube, airflow noise, wind noise can be caused, thus cause the sense of hearing of sound to be deteriorated, bring bad experience to consumer.
Shown in Figure 3, the sound of the instability that passive radiator audio amplifier then can avoid phase inverted cabinet to produce, also compare the playback lower limit that closed audio amplifier reduces loud speaker 63 low frequency simultaneously, but, the usual efficiency of passive radiator case is lower, and the response of low frequency is not as phase inverted cabinet, and transient response is not good, bad Consumer's Experience can be brought equally, simultaneously because passive radiator weight distribution problem also may bring vibration uneven.
Utility model content
Main purpose of the present utility model is to provide a kind of response that can promote low frequency, can reduce again the audio amplifier of the playback lower limit of low frequency.
For achieving the above object, the utility model provides a kind of audio amplifier, comprise casing, dividing plate, loud speaker, passive radiator and phase-reversing tube is comprised in casing, described casing is divided into the first chamber, side and the second chamber, side by dividing plate, described passive radiator is installed on dividing plate, and described loud speaker is installed on the side plate of the casing for the formation of described first chamber, side, and described phase-reversing tube is installed on the side plate of the casing for the formation of described second chamber, side.
Preferably, the side plate being provided with described loud speaker and the side plate being provided with described phase-reversing tube are oppositely arranged.
Preferably, the side plate being provided with described loud speaker is all parallel with described dividing plate with the side plate being provided with described phase-reversing tube.
Preferably in, described speaker openings is arranged at tank surface.
Preferably, described first chamber, side and described second chamber, side are symmetrical arranged.
Preferably, described loud speaker, described passive radiator and described phase-reversing tube in height shift to install.
Preferably, described loud speaker, described passive radiator and described phase-reversing tube in height set gradually from top to bottom.
Preferably, described loud speaker, described passive radiator and described phase-reversing tube are arranged from top to bottom at equal intervals.
The utility model combines the advantageous way of phase inverted cabinet and passive radiator audio amplifier.First go out passive radiator according to the characteristics design of passive radiator audio amplifier, and then increase an individual cavity, and according to the overall acoustic characteristic of passive radiator audio amplifier, increase the phase-reversing tube that can promote low-frequency effect.Combination on the whole, both can in conjunction with both advantages: the high efficiency of passive radiator audio amplifier, and the low frequency reproduction lower limit of phase inverted cabinet; Both shortcomings can be avoided again: the LF-response of passive radiator audio amplifier is not good, and the airflow noise of phase inverted cabinet, wind noise etc. simultaneously.
Accompanying drawing explanation
Fig. 1 is the structural representation of closed audio amplifier in prior art;
Fig. 2 is the structural representation of phase inverted cabinet in prior art;
Fig. 3 is the structural representation of passive radiator audio amplifier in prior art;
Fig. 4 is the structural representation of the utility model audio amplifier.
The realization of the utility model object, functional characteristics and advantage will in conjunction with the embodiments, are described further with reference to accompanying drawing.
Embodiment
Should be appreciated that specific embodiment described herein only in order to explain the utility model, and be not used in restriction the utility model.
The utility model provides a kind of audio amplifier, as shown in Figure 4, comprise casing 1, dividing plate 5, loud speaker 2, passive radiator 3 and phase-reversing tube 4 is comprised in casing 1, casing 1 is divided into the first chamber, side 11 and the second chamber, side 12 by dividing plate 5, passive radiator 3 is installed on dividing plate 5, and loud speaker 2 is installed on the side plate of the casing 1 for the formation of the first chamber, side 11, and phase-reversing tube 4 is installed on the side plate of the casing 1 for the formation of the second chamber, side 12.
The utility model combines the advantageous way of phase inverted cabinet and passive radiator 3 audio amplifier.First go out passive radiator 3 according to the characteristics design of passive radiator 3 audio amplifier, and then increase an individual cavity, and according to the overall acoustic characteristic of passive radiator 3 audio amplifier, increase the phase-reversing tube 4 that can promote low-frequency effect.Combination on the whole, both can in conjunction with both advantages: the high efficiency of passive radiator 3 audio amplifier, and the low frequency reproduction lower limit of phase inverted cabinet; Both shortcomings can be avoided again: the LF-response of passive radiator 3 audio amplifier is not good, and the airflow noise of phase inverted cabinet, wind noise etc. simultaneously.
Particularly, loud speaker 2 of the present utility model meets following equation:
f
s＝(1/2π)*(M
msC
ms)
-1/2；
Q
ts＝(2*π*f
s*M
ms*R
e)/((BL)
2+R
e*R
m)；
V
as＝ρ
oC
o 2C
ms；
Wherein, f
sfor the resonance frequency of loud speaker 2, Q
tsfor the electric Q value of loud speaker 2, V
asfor the equivalent volume of loud speaker 2, M
msfor loud speaker 2 vibroseis equivalent mass, C
msfor the mechanical compliance of loud speaker 2, R
efor loud speaker 2 D.C. resistance, R
mfor loud speaker 2 equivalent mass, B is the magnetic flux density in loud speaker 2 magnetic gap, and L is the effective length of voice coil loudspeaker voice coil wire in magnetic gap, ρ
ofor atmospheric density, C
ofor acoustic velocity under normal temperature.
Meet the loud speaker 2 of aforesaid equation requirement, sounding is stable, low-frequency effect better, simultaneously, based on the equation of above-mentioned loud speaker 2, designer can design or select suitable loud speaker 2 quickly, reduces the dependence of loud speaker 2 in the design or to experience in selecting, improves design efficiency.
Further, passive radiator 3 of the present utility model meets following equation:
f
p＝(1/2π)*(M
pC
pm)
-1/2；
Wherein, f
pfor the resonance frequency of passive radiator 3, M
pfor the mechanical compliance of passive radiator 3, C
pmfor the additional mass of passive radiator 3.
Meet the passive radiator 3 of aforesaid equation requirement, there is good bass performance, and when with loud speaker 2 frequency match, namely ideally, f
swith f
pequal, passive radiator 3 can the tone color of end adjustment audio amplifier entirety very well, makes audio amplifier entirety have the performance of better bass.
The further end, phase-reversing tube 4 of the present utility model meets following equation:
L
b＝2.25*10
3*d
2/(f
p 2*V
b)-0.85d；
Wherein, L
bfor the length of phase-reversing tube 4, d is the diameter of guide pipe, V
bfor the dischargeable capacity of passive radiator 3 outside.
On loud speaker 2 and passive radiator 3 basis, phase-reversing tube 4 also meets aforesaid equation, the radiation efficiency of loud speaker 2 is improved, thus extends the LF-response of audio amplifier, promotes low frequency audio.Certainly, phase-reversing tube 4, in concrete design process, first should determine L
bwith the numeral of in d, V simultaneously
balso be given value, so that calculate another numerical value.
It should be noted that in the utility model embodiment, the XY coordinate system definition according to setting up in Fig. 4: the side being positioned at X-axis positive direction is defined as top, the side being positioned at X-axis negative direction is defined as below; The side being positioned at Y-axis positive direction is defined as left, and the side being positioned at Y-axis negative direction is defined as right.
Shown in Figure 4, first chamber, side 11 and the second chamber, side about 12 are arranged, first chamber, side 11 and the second chamber, side 12 are also symmetrical arranged, further, the side plate being provided with loud speaker 2 and the side plate being provided with phase-reversing tube 4 are oppositely arranged, and all parallel with described dividing plate this set makes the structure of audio amplifier more reasonable, and be also convenient to produce in the setting of symmetry.
Continue shown in Figure 4, loud speaker 2 opening is arranged at casing 1 surface, and the forward radiation sound wave of raising one's voice can directly blaze abroad, and reduces the decay of sound wave.
Continue shown in Figure 4, in the utility model, loud speaker 2, passive radiator 3 and phase-reversing tube 4 are from left to right arranged, further, loud speaker 2, passive radiator 3 and phase-reversing tube 4 in height shift to install, be conducive to making the sound wave of passive radiator 3 and phase-reversing tube 4 sluggish in the sound wave of loud speaker 2, thus improve the bass effect of audio amplifier.Particularly, in this enforcement, loud speaker 2, passive radiator 3 and phase-reversing tube 4 set gradually from top to bottom, and arrange at equal intervals, are conducive to the bass effect improving audio amplifier further.
These are only preferred embodiment of the present utility model; not thereby the scope of the claims of the present utility model is limited; every utilize the utility model specification and accompanying drawing content to do equivalent structure or equivalent flow process conversion; or be directly or indirectly used in other relevant technical fields, be all in like manner included in scope of patent protection of the present utility model.
Claims (8)
1. an audio amplifier, comprise casing, it is characterized in that, dividing plate, loud speaker, passive radiator and phase-reversing tube is comprised in casing, described casing is divided into the first chamber, side and the second chamber, side by dividing plate, described passive radiator is installed on dividing plate, and described loud speaker is installed on the side plate of the casing for the formation of described first chamber, side, and described phase-reversing tube is installed on the side plate of the casing for the formation of described second chamber, side.
2. audio amplifier as claimed in claim 1, is characterized in that, the side plate being provided with described loud speaker and the side plate being provided with described phase-reversing tube are oppositely arranged.
3. audio amplifier as claimed in claim 1, it is characterized in that, the side plate being provided with described loud speaker is all parallel with described dividing plate with the side plate being provided with described phase-reversing tube.
4. audio amplifier as claimed in claim 1, it is characterized in that, described speaker openings is arranged at tank surface.
5. audio amplifier as claimed in claim 1, it is characterized in that, described first chamber, side and described second chamber, side are symmetrical arranged.
6. audio amplifier as claimed in claim 1, it is characterized in that, described loud speaker, described passive radiator and described phase-reversing tube in height shift to install.
7. audio amplifier as claimed in claim 6, it is characterized in that, described loud speaker, described passive radiator and described phase-reversing tube in height set gradually from top to bottom.
8. audio amplifier as claimed in claim 7, it is characterized in that, described loud speaker, described passive radiator and described phase-reversing tube are arranged from top to bottom at equal intervals.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520311994.9U CN204697266U (en) | 2015-05-14 | 2015-05-14 | Audio amplifier |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520311994.9U CN204697266U (en) | 2015-05-14 | 2015-05-14 | Audio amplifier |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204697266U true CN204697266U (en) | 2015-10-07 |
Family
ID=54237513
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520311994.9U Expired - Fee Related CN204697266U (en) | 2015-05-14 | 2015-05-14 | Audio amplifier |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204697266U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107786927A (en) * | 2016-08-31 | 2018-03-09 | 雅马哈株式会社 | Speaker system |
| CN108200512A (en) * | 2017-12-29 | 2018-06-22 | 联想(北京)有限公司 | Speaker and its control method |
| CN108322864A (en) * | 2017-01-16 | 2018-07-24 | 上海传英信息技术有限公司 | A kind of sound cavity apparatus and mobile terminal |
| CN110572755A (en) * | 2019-09-06 | 2019-12-13 | 歌尔科技有限公司 | Acoustic device and electronic apparatus |
-
2015
- 2015-05-14 CN CN201520311994.9U patent/CN204697266U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107786927A (en) * | 2016-08-31 | 2018-03-09 | 雅马哈株式会社 | Speaker system |
| CN107786927B (en) * | 2016-08-31 | 2020-03-31 | 雅马哈株式会社 | Loudspeaker system |
| CN108322864A (en) * | 2017-01-16 | 2018-07-24 | 上海传英信息技术有限公司 | A kind of sound cavity apparatus and mobile terminal |
| CN108200512A (en) * | 2017-12-29 | 2018-06-22 | 联想(北京)有限公司 | Speaker and its control method |
| CN108200512B (en) * | 2017-12-29 | 2023-12-22 | 联想(北京)有限公司 | Sound box and control method thereof |
| CN110572755A (en) * | 2019-09-06 | 2019-12-13 | 歌尔科技有限公司 | Acoustic device and electronic apparatus |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20151007 Termination date: 20210514 |