Semi-anechoic room sound field automatic measurement and detection method and standard device
A semi-anechoic chamber and automatic measurement technology, which is applied in the direction of measuring devices, measuring ultrasonic/sonic/infrasonic waves, instruments, etc., can solve the problems of affecting the accuracy of measurement, low measurement efficiency, and affecting measurement accuracy, so as to achieve accurate data Effect
Active Publication Date: 2013-12-11
ZHEJIANG MEASUREMENT SCI RES INST
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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 needs of large-scale acoustic laboratories. Therefore, it is very necessary to carry out automatic measurement of the sound field in the semi-anechoic room. Research on key issues in testing, and develop corresponding standard devices to achieve the purpose of automatic measurement and testing of sound field distribution in acoustic laboratories, and provide very necessary methods and hardware support for improving free sound field characteristics in semi-anechoic rooms
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Embodiment 1
[0031] refer to image 3 The semi-anechoic chamber sound field automatic measurement and detection device 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 suction cup 9, and the microphone 12. I-shaped parts 13, signal acquisition and analysis system 20, signal generator 21, and power amplifier 22, wherein the traction line runner 2 is composed of a single runner, and is fixed on the main chassis 1 by a motor; the telescopic rod 3 is fixed on the main engine On the box 1; two fixed steel wires 6 are respectively fixed with the telescopic rod 3 and the suction cup 9 through the I-shaped piece 13, and form two parallel oblique linear guide rails; Line 6 and pulling fishing line 4 are connected. Main chassis 1, refer to Figure 7 As shown, its interior includes: power supply 14, stepper motor 15, driver 16, controller 17, and limit sw...
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Abstract
The invention relates to a semi-anechoic room sound field automatic measurement and detection method and a standard device. When a traditional hand-operated sound field measurement and detection method is adopted, the measurement efficiency is low, and the measurement accuracy is poor. The standard device comprises a signal generator, a power amplifier, a sound source, a standard microphone, a microphone clamp, a signal collecting and analyzing system, a drawing fish wire, a fixed steel wire, a pulley, a drawing wire runner, a telescopic rod, an H-shaped piece, a suction cup and a mainframe box. The sound generator controls the sound source to send out a sound signal through the power amplifier, the sound signal is processed and analyzed after being received by the standard microphone, and the microphone automatically moves in a set route. According to the semi-anechoic room sound field automatic measurement and detection method and the standard device, data measured through a semi-anechoic room sound field can be more accurate, more dependable and more authoritative.
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 semi-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
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Login to View More IPC IPC(8): G01H17/00
Inventor 姚磊缪建桑帅军杨眉
Owner ZHEJIANG MEASUREMENT SCI RES INST