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Method for designing directional sound radiation of annular loudspeaker array

A technology of loudspeaker array, design method, applied in the direction of microphone, frequency/directional characteristic device, loudspeaker, etc.

Active Publication Date: 2021-06-04
NORTHWESTERN POLYTECHNICAL UNIV
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Problems solved by technology

[0005] The technical problem solved by the present invention is: in order to solve the existing modal domain-based method to realize the directional sound radiation on the circular speaker array, which requires all the speaker sounding units to be located on an infinitely long rigid cylindrical surface, the present invention relates to a Design method for directional sound radiation of circular loudspeaker array

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  • Method for designing directional sound radiation of annular loudspeaker array
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  • Method for designing directional sound radiation of annular loudspeaker array

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[0040] In describing the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", " Orientation indicated by rear, left, right, vertical, horizontal, top, bottom, inside, outside, clockwise, counterclockwise, etc. The positional relationship is based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, Therefore, it should not be construed as limiting the invention.

[0041] see Figure 1-Figure 3 , technical scheme of the present invention comprises the following steps:

[0042] 1. According to the use requirements, design the expected directional sound pressure distribution on the horizontal plane. On...

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Abstract

The invention relates to a method for designing directional sound radiation of an annular loudspeaker array, which is characterized in that modal matching is carried out on directional sound pressure distribution and a sound field generated by the annular loudspeaker array, a generation unit of the annular loudspeaker array is not required to be positioned in a rigid cylindrical cavity any more, and only a single loudspeaker unit needs to be assembled into a cylindrical shape. Therefore, the requirement on a cavity manufacturing process is reduced. The loudspeaker array provided by the invention is formed by assembling the single loudspeaker units, so that the mutual coupling phenomenon among the loudspeakers is reduced, and the independent control of the loudspeaker units can be realized. According to the loudspeaker array used by the invention, loudspeaker units are not required to be positioned on an infinitely long rigid cylindrical surface any more, so that an actual loudspeaker model is closer to a theoretical model, and the implementation error of directional sound radiation is smaller; the height of the loudspeaker array in the invention is limited, so that the loudspeaker array is widely applicable to scenes such as vehicle-mounted sound equipment and home theaters.

Description

technical field [0001] The invention belongs to the field of audio signal processing and sound reproduction, and in particular relates to a design method for directional sound radiation of a circular loudspeaker array. Background technique [0002] Directional acoustic radiation technology, also known as acoustic focusing technology, refers to focusing acoustic energy to a certain area of ​​space through a transducer array. This technology is widely used in various scenarios, such as concert scene, car warning sound, weakening the call leakage of mobile phones and tablets, regional sound field control and active noise reduction, etc. [0003] At present, the methods that can effectively realize directional sound radiation can be divided into two categories: the first category is the parametric array loudspeaker, which modulates the audio signal and the ultrasonic carrier signal, because the high-intensity ultrasonic carrier modulation signal propagates in the air It can pro...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04R1/40
CPCH04R1/403H04R2201/405Y02T90/00
Inventor 张雯王佳乐
Owner NORTHWESTERN POLYTECHNICAL UNIV
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