Method for automatically measuring and testing sound field of complete anechoic chamber and standard device
A technology of automatic measurement and detection method, applied in measurement devices, measurement of ultrasonic/sonic/infrasonic waves, instruments, etc., can solve the problems that affect the accuracy of measurement, cannot be in a straight line, and take a long time to measure, and achieve accurate data. Effect
Active Publication Date: 2015-02-11
ZHEJIANG MEASUREMENT SCI RES INST
View PDF3 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
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
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment 1
[0032] refer to image 3 , refer to image 3 The sound field automatic measurement and detection device of the full anechoic chamber consists of the main box 1, the traction line runner 2, the telescopic rod 3, the traction fishing line 4, the pulley 5, the fixed steel wire 6, the microphone fixture 7, the sound source 8, the main box 11, It consists of standard microphone 12, I-shaped piece 13, signal acquisition and analysis system 20, signal generator 21, and power amplifier 22, wherein the traction line runner 2 is composed of two runners placed in parallel and turned to the opposite direction, and fixed on the main box by a motor 1 above; two telescopic rods 3 are respectively fixed on the main frame 1 and the main frame 11, and the pulley 5 is fixed on the telescopic rod 3 through the I-shaped piece 13; The rods are fixed to form two horizontal linear guide rails; the microphone clamp 7 is used to fix the microphone 12 and is connected with the fixed steel wire 6 and th...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More 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...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Patents(China)
IPC IPC(8): G01H17/00
Inventor 姚磊缪建钟波牛锋桑帅军裘剑敏杨眉
Owner ZHEJIANG MEASUREMENT SCI RES INST