Method for automatically measuring and testing sound field of complete anechoic chamber and standard device

Abstract

The invention relates to a method for automatically measuring and testing a sound field of a complete anechoic chamber and a standard device. A traditional manual sound field measuring and testing method is low in measuring efficiency and poor in measuring accuracy. The standard device comprises a signal generator, a power amplifier, a sound source, a standard microphone, a microphone fixture, a signal collecting and analyzing system, a traction fish wire, a fixed steel wire, a pulley, a traction wire rotating wheel, a telescopic rod, an H-shaped piece, and a mainframe box. The signal generator sends out sound signals through the sound source after going through the power amplifier. The sound signals are received by the standard microphone and then are processed and analyzed. The standard microphone automatically walks in a preset path. The method and the standard device enable measuring data of the sound field of the complete anechoic chamber to be more accurate, more credible and more authorized.

Description

technical field [0001] The invention relates to an automatic measurement and detection method and a standard device, in particular to an automatic measurement and detection method and a standard device for the sound field of a full anechoic chamber. Background technique [0002] With the strengthening of our country's economic strength, people's living standards have been significantly improved, and the corresponding requirements for the quality of life are also getting higher and higher. People's requirements for acoustics (such as electroacoustics, architectural acoustics, material acoustics, etc.) are also increasing day by day. Hall and other building hall vocal effect requirements and so on. The above requirements will correspondingly put forward requirements such as research and evaluation of the sound quality of electro-acoustic products and acoustic performance evaluation of building halls, which will involve anechoic chambers (including full anechoic chambers and s...

AI Technical Summary

Problems solved by technology

The current traditional manual sound field measurement test method not only has low measurement efficiency (the measurement takes too long, which directly leads to worse stability of the sound source in the same path test, which affects the measurement accuracy), but also due to manual movement of the microphone As a result, the moving path of the microphone cannot be in a straight line, which affects the accuracy of the measurement. Therefore, the traditional manual sound field measurement can no longer meet the measurement and test requirements of today's large-scale acoustic laboratories. Therefore, it is very necessary to carry out automatic measurement of the sound field in the full anechoic room. Research on the key issues in the test, and develop corresponding standard devices to achieve the purpose of automatic measurement and test of the sound field distribution in the acoustic laboratory, and provide very necessary methods and hardware support for improving the free sound field characteristics of the full anechoic room

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