CN2641963Y - Loudspeakers - Google Patents
Loudspeakers Download PDFInfo
- Publication number
- CN2641963Y CN2641963Y CN 03247496 CN03247496U CN2641963Y CN 2641963 Y CN2641963 Y CN 2641963Y CN 03247496 CN03247496 CN 03247496 CN 03247496 U CN03247496 U CN 03247496U CN 2641963 Y CN2641963 Y CN 2641963Y
- Authority
- CN
- China
- Prior art keywords
- basin
- bullet
- audio amplifier
- casing
- box
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Abstract
The utility model provides a sound box, which adopts an elastic cone, rather than an inverted tube, to form a sealed box, isolating air in the box body from the outside, and eliminating airflow noise produced by air releasing out of the inverted tube in the box body of a prior inverted sound box, therefore, the lower limit of the low-frequency replay of the sound box is raised, no air current sound is produced, and the oscillation amplitude of a speaker cone is reduced, thereby the lower limit of the low-frequency replay of the sound box is reduced.
Description
Technical field
The utility model relates to a kind of audio amplifier, especially a kind of audio amplifier that can effectively prevent airflow noise and can reduce low frequency playback lower limit.
Background technology
As everyone knows, present audio amplifier mainly is divided into closed audio amplifier and phase inverted cabinet two big classes.Advantages such as it is exactly closed audio amplifier that whole box body is closed, and it has simple in structure, and the low-frequency distortion degree is little during playback, and damping is big, its shortcoming are that the sound wave of just having stopped speaker awl basin front and back disturbs, and but the back sound wave is not made full use of.At above situation, the designer designed a kind of phase inverted cabinet afterwards, its basic principle is perforate and load onto circular phase-reversing tube on the panel of casing, radiate after making the sound wave of loud speaker back side radiation anti-phase, with the sound wave of speaker awl basin head-on radiation mutually superposition total sound radiation pressure is strengthened, but when the signal frequency of resetting is very low, air in the casing will release from phase-reversing tube, thereby generation airflow noise, and the acoustic resistance of box house is reduced, the Oscillation Amplitude of speaker awl basin strengthens, thereby causes the low frequency playback lower limit of audio amplifier to promote, and the audio distortions degree increases.
Summary of the invention
The utility model has overcome the shortcoming that exists in the prior art, and a kind of audio amplifier of eliminating airflow noise and can effectively reducing low frequency playback lower limit is provided.
The technical scheme that the utility model is taked is: it comprises casing, loud speaker and bullet basin, loud speaker and play basin and all be installed on the casing, and this casing, loud speaker and bullet basin form a closed box, and playing basin is the recessed and scalable vibrating diaphragm of an arc.
Technical solutions of the utility model also may further be: this bullet basin is an awl basin shape vibrating diaphragm, and the dust cap of the center of this basin shape vibrating diaphragm with a projection spherical in shape.
The audio amplifier of the utility model forms a closed box, and air can't release, and can not produce airflow noise; When the speaker awl basin vibrated, the air pressure in the casing changed thereupon, drove the bullet basin and did corresponding vibrations, and at this moment, the acoustic resistance in the casing improves relatively, and the Oscillation Amplitude of speaker awl basin reduces, and reduce together with vibration frequency, thereby low frequency playback lower limit reduces.
Description of drawings
Below in conjunction with accompanying drawing and embodiment the utility model is described in further detail:
Fig. 1 is the schematic perspective view of the utility model audio amplifier;
Fig. 2 be among Fig. 1 A-A to profile.
Embodiment
See also shown in Figure 1ly, it comprises the audio amplifier of the utility model a casing 1, loud speaker 2 and plays basin 3, wherein, and loud speaker 2 and play basin 3 and be installed on the casing 1; Its circuit of the audio amplifier of the utility model, magnetic circuit are all same as the prior art, so do not repeat them here.
Please consult Fig. 1 again, this bullet basin 3 has the recessed and scalable vibrating diaphragm of an arc 31, and in the present embodiment, this vibrating diaphragm 31 is set to bore basin shape, has the dust cap 32 of a projection spherical in shape in the center of this vibrating diaphragm 31.
See also shown in Figure 2, this casing 1, loud speaker 2 and bullet basin 3 form a closed box 4, air in the closed box 4 can be compressed under the effect of loud speaker 2 back sides vibration and produce resonance, play basin 3 vibrations and sounding thereby drive, when the resonance frequency of sound frequency and audio amplifier near or when identical, the amplitude of loud speaker 2 awl basins becomes very little, because hindering the energy that plays basin 3 acoustic radiations disappears, at this moment the amplitude that plays basin 3 reaches maximum, produce stronger homophase acoustic radiation, loud speaker 2 low frequency radiation abilities are strengthened; When sound frequency further improved, the amplitude that plays basin 3 began to weaken, and the amplitude of loud speaker 2 awl basins begins to strengthen, because both phase places are much at one, and the mutual superposition of acoustic pressure.
The utility model also can use bigbore bullet basin under the condition that reduces tank-volumes hardly, the low frequency playback lower limit of audio amplifier is further expanded.
Comprehensive the above as can be known because the audio amplifier of the utility model forms a closed box, air stream can't release, and can not produce airflow noise; When the speaker awl basin vibrated, the air pressure in the casing changed thereupon, drove the bullet basin and did corresponding vibrations, and at this moment, the acoustic resistance in the casing improves relatively, and the Oscillation Amplitude of speaker awl basin reduces, and reduce together with vibration frequency, thereby low frequency playback lower limit reduces.
Claims (3)
1, a kind of audio amplifier, it comprises casing, loud speaker and bullet basin, loud speaker and bullet basin all are installed on the casing, it is characterized in that described casing, loud speaker and bullet basin form a closed box, and this bullet basin are the recessed and scalable vibrating diaphragm of an arc.
2, the audio amplifier according to claim 1 is characterized in that, described bullet basin is an awl basin shape vibrating diaphragm.
3, the audio amplifier according to claim 2 is characterized in that the dust cap that the center of described awl basin shape vibrating diaphragm has a projection spherical in shape.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03247496 CN2641963Y (en) | 2003-06-20 | 2003-06-20 | Loudspeakers |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03247496 CN2641963Y (en) | 2003-06-20 | 2003-06-20 | Loudspeakers |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2641963Y true CN2641963Y (en) | 2004-09-15 |
Family
ID=34292855
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 03247496 Expired - Fee Related CN2641963Y (en) | 2003-06-20 | 2003-06-20 | Loudspeakers |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2641963Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101090582B (en) * | 2006-06-16 | 2011-08-31 | 雅马哈株式会社 | Loudspeaker system and loudspeaker enclosure |
| CN105953910A (en) * | 2016-05-27 | 2016-09-21 | 成都信息工程大学 | Silhouette rocket bomb high-altitude explosion sub-tone acquisition device |
| CN110213690A (en) * | 2019-06-29 | 2019-09-06 | 先歌音响（吉安）有限公司 | A kind of HIFI sound box system and reinforce the method for resetting sound effect |
-
2003
- 2003-06-20 CN CN 03247496 patent/CN2641963Y/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101090582B (en) * | 2006-06-16 | 2011-08-31 | 雅马哈株式会社 | Loudspeaker system and loudspeaker enclosure |
| CN105953910A (en) * | 2016-05-27 | 2016-09-21 | 成都信息工程大学 | Silhouette rocket bomb high-altitude explosion sub-tone acquisition device |
| CN105953910B (en) * | 2016-05-27 | 2019-04-16 | 成都信息工程大学 | A kind of shadow rocket projectile high-altitude explosion subsonics acquisition device |
| CN110213690A (en) * | 2019-06-29 | 2019-09-06 | 先歌音响（吉安）有限公司 | A kind of HIFI sound box system and reinforce the method for resetting sound effect |
| CN110213690B (en) * | 2019-06-29 | 2020-05-15 | 先歌音响（吉安）有限公司 | HIFI sound box system and method for enhancing sound reproduction effect |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20040915 Termination date: 20120620 |