CN101472208A - Long distance microphone with high directionality - Google Patents
Long distance microphone with high directionality Download PDFInfo
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- CN101472208A CN101472208A CNA2007101735503A CN200710173550A CN101472208A CN 101472208 A CN101472208 A CN 101472208A CN A2007101735503 A CNA2007101735503 A CN A2007101735503A CN 200710173550 A CN200710173550 A CN 200710173550A CN 101472208 A CN101472208 A CN 101472208A
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- microphone
- mirror
- curved surface
- surface mirror
- long distance
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Abstract
The invention relates to a high-directivity long-distance microphone, which includes a normal microphone. The invention is characterized in that the normal microphone is fixed on a perifocus position of a reflection curvature surface mirror through a microphone holder; the reflection curvature surface mirror is fixed on a whole bracket with wheels at the bottom; and a telescopic back bracket is attached to the back of the reflection curvature surface mirror. The invention has the advantages that the voice made by a spokesman is focused on a normal microphone after being reflected through the reflection curvature surface mirror, so as to enable the microphone to possess the high directivity and the long-distance property, avoid the trouble that the microphone needs to be passed among spokesmen when a spokesman finishes the speech, and save the time of all attendants.
Description
Technical field
The present invention relates to a kind of transaudient equipment, especially a kind of long distance microphone with high directionality.
Background technology
Microphone is a requisite transaudient equipment in various large-scale activities such as reception, seminar or the forum, yet the staff need pass microphone in meeting owing to the limitation that has microphone reception voice signal scope and distance now causes, and is a kind of huge waste of personnel and time.
Summary of the invention
Purpose of the present invention: aim to provide a kind of microphone that can overcome above-mentioned defective, wish that it can be as camera lens, as long as the people of the accurate speech of the pair just can be amplified its sound, thereby alleviate the work load that the staff passs microphone, saved participant's time simultaneously.
A kind of long distance microphone with high directionality, comprise common microphone 4, it is characterized in that: described common microphone 4 is fixed on the perifocus position of reflecting curved surface mirror 2 by microphone holder 3, reflecting curved surface mirror 2 is fixed on a bottom to be had on the integral support 1 of wheel, and the back side of reflecting curved surface mirror 2 is with a telescopic after-poppet 5.
Described wheel is two front-wheels 6 and a trailing wheel 7.
Described reflecting curved surface mirror 2 is ELLIPTIC REVOLUTION curved mirror, parabola surface of revolution mirror or circumference surface of revolution mirror.
Described common microphone 4 is wireless microphone or cable microphone.
Compare with common microphone commonly used in the present meeting, long distance microphone with high directionality of the present invention has accurate directive property, can be at the sound wave that arrives the spokesman than remote capture, and say that it is focused on the common microphone, reach desirable acoustic effect, thereby alleviated the burden that the staff passs microphone greatly, the time of also effectively having saved the participant.
Description of drawings
Accompanying drawing 1 is the schematic diagram of sound focusing mirror;
Accompanying drawing 2 is a front view of the present invention;
Accompanying drawing 3 is a left view of the present invention.
Among the figure: 1, integral support 2, reflecting curved surface mirror 3, microphone holder 4, common microphone 5, telescopic after-poppet 6, front-wheel 7, trailing wheel
Embodiment
This long distance microphone with high directionality mainly utilizes the principle of sound focusing mirror.Its basic principle as shown in Figure 1, the curved mirror on the left side is a section of ELLIPTIC REVOLUTION curved surface, this curved surface has two focus A, B, a non-direction microphone place from the near focus A place of curved mirror, sound source is at focus B place.Curved mirror and microphone all place the sound field far field.When wave length of sound during less than bifocal distance and less than curved mirror diameter D, from the sound wave of sound source radiation after the oval calotte reflection, focus on the A place, form acoustic image, therefore the sound pressure level at A place is much higher than the free field result, the sound wave of the sound source radiation of other position focuses on other picture point place after the curved surface mirroring.So the sound focusing mirror system can increase substantially signal to noise ratio, gathers the sound in interested sound source zone.
The technical scheme that realizes this long distance microphone with high directionality as shown in Figure 2;
Form by integral support 1, elliptic reflecting surface 2, microphone holder 3, common microphone 4, telescopic after-poppet 5, front-wheel 6 and trailing wheel 7 etc.;
3 wheels are arranged at the bottom of integral support 1, and 2 is that 6,1 on front-wheel is a trailing wheel 7, and trailing wheel 7 can freely turn to, thereby drives whole contrive equipment left-right rotation easily.
When changing the spokesman, can be according to different spokesman's position and height, adjust the luffing angle of reflecting curved surface mirror 2 and the position of whole contrive equipment, make any spokesman when its speech, can both be positioned on the major axes orientation of reflecting curved surface mirror 2, thereby reach best acoustic effect.
Can also make whole contrive equipment more accurate by fix a laser pointer at the afterbody of microphone holder 3 to spokesman's location.
Reflecting curved surface mirror 2 can adopt ELLIPTIC REVOLUTION curved mirror, parabola surface of revolution mirror or circumference surface of revolution mirror, but near the audio-visual effects that the ELLIPTIC REVOLUTION curved mirror generates focus is best.
To common microphone 4 no specific (special) requirements, wireless microphone or cable microphone all can in this technical scheme.
Claims (6)
1, a kind of long distance microphone with high directionality, comprise common microphone (4), it is characterized in that: described common microphone (4) is fixed on the perifocus position of reflecting curved surface mirror (2) by microphone holder (3), reflecting curved surface mirror (2) is fixed on a bottom to be had on the integral support (1) of wheel, and the back side of reflecting curved surface mirror (2) is with a telescopic after-poppet (5).
2, long distance microphone with high directionality according to claim 1 is characterized in that: described wheel is two front-wheels (6) and a trailing wheel (7).
3, long distance microphone with high directionality according to claim 1 is characterized in that: described reflecting curved surface mirror (2) is the ELLIPTIC REVOLUTION curved mirror.
4, long distance microphone with high directionality according to claim 1 is characterized in that: described reflecting curved surface mirror (2) is a parabola surface of revolution mirror.
5, long distance microphone with high directionality according to claim 1 is characterized in that: described reflecting curved surface mirror (2) is a circumference surface of revolution mirror.
6, long distance microphone with high directionality according to claim 1 is characterized in that: described common microphone (4) is wireless microphone or cable microphone.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007101735503A CN101472208A (en) | 2007-12-28 | 2007-12-28 | Long distance microphone with high directionality |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007101735503A CN101472208A (en) | 2007-12-28 | 2007-12-28 | Long distance microphone with high directionality |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101472208A true CN101472208A (en) | 2009-07-01 |
Family
ID=40829270
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2007101735503A Pending CN101472208A (en) | 2007-12-28 | 2007-12-28 | Long distance microphone with high directionality |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101472208A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102771140B (en) * | 2010-02-08 | 2016-08-31 | 罗伯特·博世有限公司 | high directivity boundary microphone |
-
2007
- 2007-12-28 CN CNA2007101735503A patent/CN101472208A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102771140B (en) * | 2010-02-08 | 2016-08-31 | 罗伯特·博世有限公司 | high directivity boundary microphone |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Open date: 20090701 |