Sound insulation measurement system based on hand-held sound intensity probe suite

Abstract

The invention discloses a sound insulation measurement system based on a hand-held sound intensity probe suite. The sound insulation measurement system based on the hand-held sound intensity probe suite comprises a complete elimination chamber and a reverberation room which are separated through a wall surface, the center of the wall surface is provided with a window which divides the complete elimination chamber and the reverberation room completely through sealing installation of a sample piece to be tested, and the reverberation room is internally and uniformly provided with a plurality oflow-frequency loudspeakers, high-frequency loudspeakers and microphones. The complete elimination chamber is provided with the hand-held sound intensity probe suite, a data acquisition system and hardware and a test computer. The data acquisition system and hardware is in circuit connection with the low-frequency loudspeakers and the high-frequency loudspeakers through an audio control unit to constitute an original signal output module. The hand-held sound intensity probe suite and the microphones are separately connected with the data acquisition system and hardware, and the data acquisitionsystem and hardware is connected with the test computer. According to the sound insulation measurement system based on the hand-held sound intensity probe suite, the structure is simple, the test process is easy to adjust, the sound insulation measurement system is convenient to move, meanwhile, sound insulation measurement results are reliable, and the cost is low.

Description

technical field [0001] The invention relates to a material-level and part-level sound insulation measurement system, in particular to a sound insulation measurement system based on a hand-held sound intensity probe kit, which belongs to the field of automobile structure-acoustic vibration coupling systems. Background technique [0002] With the continuous improvement of people's living standards and the continuous development of industrialization, people have higher and higher requirements for noise reduction. Therefore, higher and stricter requirements are put forward for the sound insulation performance of automobiles, ships, aircraft, buildings and other components. At the same time, with the continuous development of the field of room acoustics and environmental acoustics, modern sound intensity measurement technology has shown greater advantages in sound power measurement, noise source identification, material level, component level sound absorption coefficient and sound...

AI Technical Summary

Problems solved by technology

However, as the frequency increases, the amplitude error of the sound intensity measurement increases accordingly

At the same time, the three-dimensional sound intensity test technology has high requirements on the hardware system of sound intensity measurement, and the structure of the regular tetrahedral three-dimensional sound intensity probe is complex, which is enough to buy and maintain high equipment costs.

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