Three-dimensional vector sound intensity probe

Abstract

The invention discloses a three-dimensional vector sound intensity probe comprising a microphone set, an arrangement frame set, a supporting rod, a handle, a locking nut, a baffle plate, locking screws, a fixed column, a spacing column, a center rod and a center square rod. The microphone set includes a microphone I, a microphone II, a microphone III and a microphone IV. The arrangement frame set includes an arrangement frame I and an arrangement frame II. The sound intensity components of three directions of the measuring points in a sound field can be acquired through one time of measurement so that the space positioning precision can be guaranteed, the measurement process can be simplified and the measurement time can be saved; and the probe only uses four microphones so that the structure is simple and use is convenient, and the probe can be widely used for the field of noise source identification and control.

Description

technical field [0001] The invention relates to a three-dimensional vector sound intensity probe, which belongs to the field of noise source identification and control. Background technique [0002] The commonly used sound intensity measurement method is the double-microphone cross-power spectrum sound intensity measurement method, that is, the measured sound pressure is measured by two microphones that are very close to each other, so as to obtain a single sound intensity in a certain direction. Because the sound intensity vector can not only determine the size of the sound propagating in space, but also determine its direction, so the measurement of three-dimensional vector sound intensity is of high value in the field of noise source identification. However, the key to obtaining the vector sound intensity is to measure the sound intensity components in the three directions of X, Y, and Z, so as to determine the size and direction in space. [0003] In the early days, a s...

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Problems solved by technology

[0003] In the early days, a sound intensity probe was used to measure the three directions of X, Y, and Z to obtain the sound intensity components. The specific operation required three samplings, and the measurement process took a long time, making it difficult to ensure the accuracy of spatial positioning.

[0004] The B&K WA0447 three-dimensional vector probe produced by the Danish B&K company uses three pairs of microphones to sample six channels at the same time, and measures the sound intensity in three directions at a time, but because the sound pressure at its center point is obtained by averaging the sound pressure measured by six microphones , thus introducing a large error, and a three-dimensional vector probe uses six microphones, which is very expensive

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