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Infrasound Experimental System with Adjustable Pressure Chamber Volume

A pressure chamber and experimental system technology, applied in the field of subacoustics, can solve the instability of infrasound amplitude frequency, phase frequency and infrasound sound pressure level, inability to flexibly use experimental objects of different sizes, and inability to optimize infrasound characteristics, etc. problem, to achieve the effect of reducing the series of regulating tubes

Active Publication Date: 2017-11-17
JILIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0011] The present invention aims to solve the problem that the existing infrasound generator cannot be flexibly used for experimental objects of different sizes due to the fixed volume of the infrasound pressure chamber, and the infrasound characteristics in the chamber cannot be optimized. Frequency, phase frequency and infrasonic sound pressure levels are unstable, resulting in large errors and other problems; provide an infrasonic experimental system with adjustable pressure chamber volume

Method used

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  • Infrasound Experimental System with Adjustable Pressure Chamber Volume
  • Infrasound Experimental System with Adjustable Pressure Chamber Volume
  • Infrasound Experimental System with Adjustable Pressure Chamber Volume

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Experimental program
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specific Embodiment approach 1

[0028] Specific implementation mode 1. Combination Figure 1 to Figure 6 In this embodiment, the infrasound experimental system with adjustable pressure chamber volume includes a box body, sound source driving equipment and sound pressure detection equipment, and the box body includes a speaker chamber 11 and a sealed resonant cavity 1, cavity wall The infrasonic pressure chamber formed by the sound-absorbing material 3 between the resonant cavity tube 2 and the cavity wall interlayer; the speaker chamber 11 is connected with the sound source driving device, and the sound source driving device is connected with the sound pressure detection device; pressure error active control device, the sound pressure error active control device is respectively connected with the sound source driving device and the sound pressure detection device; the volume of the infrasonic pressure chamber is adjustable,

[0029] Described sound source driving equipment comprises sinusoidal signal generat...

specific Embodiment approach 2

[0038] Embodiment 2. This embodiment is an experimental method for testing the influence of infrasound on human body and animals by adopting the infrasound experimental system with adjustable pressure chamber volume described in Embodiment 1:

[0039] The impact of infrasound on the physiological functions of humans and animals is multifaceted, mainly including the impact of infrasound on the nervous system, cardiovascular system, endocrine system, and vestibular and auditory systems. The key factors of the experimental research are mainly the acquisition of infrasound exposure frequency, exposure intensity, exposure time and the results of infrasound effects on humans and animals.

[0040] First of all, select the test object such as human or animal, according to the size of the test object, move the corner fitting combination connecting the auxiliary column 12-2 and the beam 12-3 according to the marked scale series on the auxiliary column 12-2, and select a suitable pressure...

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Abstract

The infrasound experimental system with adjustable pressure chamber volume relates to the field of infrasonics and solves the problem that existing infrasound generators cannot be flexibly used for different sizes of experimental objects due to the fixed volume of the infrasonic pressure chamber and cannot make the infrasound in the room The characteristics are optimal, and at the same time, due to the instability of the infrasonic amplitude frequency, phase frequency and sound pressure level in the pressure chamber, there are problems such as large errors; including the cabinet, sound source drive equipment and sound pressure detection equipment, the speaker room and The sound source drive device is connected, and the sound source drive device is connected with the sound pressure detection device; it also includes the sound pressure error active control device, and the sound pressure error active control device is respectively connected with the sound source drive device and the sound pressure detection device; by adjusting the infrasound pressure The height of the chamber changes its volume; the box wall is surrounded by carbon fiber wall panels fixed on the aluminum alloy box frame, and the resonant cavity tube is composed of telescopic adjustment tubes and flanges; High precise infrasonic sound pressure level.

Description

technical field [0001] The invention relates to the field of infrasound, in particular to an infrasound experiment system with adjustable pressure chamber volume. Background technique [0002] Infrasound is an inaudible sound wave with a frequency lower than 20Hz, which can affect human psychology and physiology. There are subtle and rhythmic pulsations in every part of the human body, and the pulsation frequency is generally 2-16 Hz, such as 4-6 Hz for internal organs and 8-12 Hz for the head. These natural frequencies of the human body are just within the frequency range of infrasonic waves. Once high-power infrasound waves act on the human body, it will cause strong resonance in the human body, causing great harm. Long-term exposure to a strong infrasound environment can lead to abnormal function of various organs, pathological changes, and even serious injuries, such as imbalance, nervous system disorders, organ damage, and death. [0003] In order to quantitatively st...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B06B1/04
Inventor 王登峰张帅
Owner JILIN UNIV