Sound insulation measurement system and measurement method based on three-dimensional sound intensity array

A measurement system and sound intensity technology, applied in measurement devices, detection of response signals, analysis of solids using sound waves/ultrasonic waves/infrasonic waves, etc., can solve problems such as limited measurement range and background noise sensitivity, and avoid multiple measurements and reduce The effect of workload and random error, simple operation

Pending Publication Date: 2017-05-17
SOUTH CHINA UNIV OF TECH
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Problems solved by technology

The traditional sound pressure method inevitably has the disadvant

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  • Sound insulation measurement system and measurement method based on three-dimensional sound intensity array
  • Sound insulation measurement system and measurement method based on three-dimensional sound intensity array
  • Sound insulation measurement system and measurement method based on three-dimensional sound intensity array

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Embodiment Construction

[0054] The present invention will be further described below in conjunction with the accompanying drawings, but the scope of protection claimed by the present invention is not limited to the scope of the embodiment description, and any equivalent transformation of the technical solution according to the present invention belongs to the protection scope of the present invention.

[0055] The sound insulation measurement system based on the three-dimensional sound intensity array of the present invention can measure the sound intensity vectors on both sides of the building components, and then obtain the air sound insulation of the building components.

[0056] Such as figure 1 As shown, a sound insulation measurement system based on a three-dimensional sound intensity array includes a sound receiving room 1, a sound source room 2, a measurement platform 3 based on Labview, a regular tetrahedral sound intensity probe 4, a reflector 6, a PC 7, Sound card 8, power amplifier 9, dod...

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Abstract

The invention discloses a sound insulation measurement system and a measurement method based on a three-dimensional sound intensity array. According to the sound insulation measurement system, a measurement platform based on Labview and a regular tetrahedron sound intensity probe are arranged inside a sound receiving chamber; a PC (Personal Computer), a sound card, a power amplifier and a dodecahedron loudspeaker are arranged inside a sound source chamber; the PC, the sound card, the power amplifier and the dodecahedron loudspeaker are connected in sequence; the dodecahedron loudspeaker is positioned in the central position of the sound source chamber; a test part to be measured and a reflection plate are arranged between the sound receiving chamber and the sound source chamber; the test part to be measured is arranged in the center of a wall surface; the reflection plate is positioned at the periphery of the test part to be measured; the sound receiving chamber is completely isolated from the sound source chamber through the test part to be measured and the reflection plate; the PC, the sound card, the power amplifier and the dodecahedron loudspeaker form an original signal output module. Sound intensity vectors tested by using the sound insulation measurement system comprise information such as amplitude and phase, and not only is an air sound insulation index of a building part tested, but also the direction of a noise source can be predicted by calculating directions.

Description

technical field [0001] The invention relates to a sound insulation measurement system, in particular to a sound insulation measurement system based on a three-dimensional sound intensity array, belonging to the field of architectural acoustics. Background technique [0002] With the continuous development of indoor acoustics and environmental acoustics, modern sound intensity measurement technology has shown greater advantages in sound power measurement, noise source identification, and material sound absorption coefficient measurement. The traditional two-microphone method (p-p method) converts the test signal from the time domain to the frequency domain through a dual-channel FFT analyzer, and then calculates the imaginary part of the cross-spectrum to obtain the instantaneous sound intensity. The disadvantage of this measurement method is that the sound intensity on one axis can only be determined each time, and the sound intensity vector at a certain point can only be de...

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Application Information

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IPC IPC(8): G01N29/11G01N29/24G01N29/36
CPCG01N29/11G01N29/24G01N29/36G01N2291/015G01N2291/023
Inventor 王红卫张龙
Owner SOUTH CHINA UNIV OF TECH
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