Reflection-type paraboloid sound guiding device
A guiding device and reflective technology, applied in the direction of electrical components, etc., can solve the problem that the sound cannot be transmitted from the horn, and achieve the effect of light weight, small size and improved conversion efficiency
Inactive Publication Date: 2012-09-05
ZHONGHUAN ZENMAY TIANJIN ACOUSTICS TECH
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Problems solved by technology
[0007] At present, all horn-type speakers have the area of the horn mouth larger than the area of the throat, otherwise the sound cannot be transmitted from the horn
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[0030] Describe the present invention in detail below in conjunction with accompanying drawing:
[0031] Such as Figure 1 to Figure 6 As shown, the reflective parabolic sound guide device utilizes the focusing characteristics of the parabolic focus, and places the horn mouth of the horn speaker on the parabolic focus. After the sound is reflected by the paraboloid, it becomes a cluster of sound directions parallel to the central axis of the paraboloid. Radiation outside the paraboloid. A plane acoustic wave can be approximately formed at the parabolic radiation outlet. After the sound wave radiates out, it can play the role of gathering sound energy in the direction of sound radiation, making the directivity of the device sharper.
[0032] Such as figure 1 The composition principle of the reflective parabolic acoustic guide device is shown, and the equation Y 2 =2px is a parabola passing through the coordinate origin of the Cartesian coordinate system. This parabola is a...
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The invention relates to a reflection-type paraboloid sound guiding device which is characterized in that a forming method of the wall of a paraboloid sound guiding pipe comprises the following steps of: respectively outwards moving two symmetrical parts of a parabola from an original point; and then rotating a paraboloid formed by the parabola by taking the original point of the parabola as an axle centre before the parabola is outwards moved, wherein the top end of the paraboloid sound guiding pipe is a circular plane, the wall of the paraboloid sound guiding pipe is in a paraboloid shape, and the integral paraboloid sound guiding pipe is in a basin-shaped structure. The reflection-type paraboloid sound guiding device has a total acoustic pressure level in a 0-degree direction higher than that of the conventional high horn type loudspeaker by more than 3 dB when reproducing sounds under the condition of using a same sound head, is especially suitable for long-distance broadcasting with high directional property, has small size, light weight and convenient for carrying, transportation and installation, can be combined to line sound sources or surface sound sources of various types with different sizes if designed into a square in appearance and has intense directional property, higher output sound power and further broadcasting transmission distance due to the line sound sources or the surface sound sources combined by the loudspeaker.
Description
technical field [0001] The invention relates to the field of electro-acoustic technology, in particular to a highly directional reflective parabolic sound guide device capable of improving the radiation sound pressure level of the horn-type loudspeaker (0°) direction. Background technique [0002] At present, in the horn speakers produced and sold at home and abroad, or in the teaching materials of some domestic and foreign colleges or scientific publications that can be seen, professionals have designed horns of different shapes for horn speakers of different purposes. The horns also vary in length. But these horns of different shapes have one thing in common: they all have a small throat and a large opening. All calculations are based on the cross-sectional area from the throat. As the distance from the throat increases, the cross-sectional area of the horn increases continuously until the cross-sectional area is the largest when it reaches the horn mouth. The differen...
Claims
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IPC IPC(8): H04R29/00
Inventor 张吉宏龙江霞王一平王诗强张积元代云飞
Owner ZHONGHUAN ZENMAY TIANJIN ACOUSTICS TECH