為了從環境保護和勞動衛生學的角度研究次聲對人的影響，本研究基於亥姆霍茲諧振器的基本原理研製了一個次聲試驗系統。讀系統由亥姆霍茲諧振器、電聲驅動部分和測控分析部分組成，通過對該系統的聲學性能進行測試和分析，確定了系統所能發出的次聲頻率和次聲級範圍，討論了系統發出次聲時所產生的高次諧波對系統性能的影響及系統的頻響特性，檢驗了諧振腔內部次聲場空間分布的均勻性，結果表明該系統的聲學性能是令人滿意的，能夠滿足研究次聲及其對人影響的實驗要求。
In order to study the effects of infrasound on human beings from the viewpoint of labor hygiene and environmental protection, an infrasound experiment system has been developed based on the fundamental principle of Helmholtz resonator. The system consists of a Helmholtz resonator, the electro-acoustic driving systems, measur- ing and controling analytic systems. Some measurements are carried out to evaluate the acoustic performance of the system in the infrasonic frequency range. It is determined that the system can reproduce the infrasonic frequency and sound pressure level range. When the system reproduces infrasound with the loudspeakers, influence of generating the higher harmonies on system performance and frequency response characteristic of the system are discussed. Spatial distribution uniformity of sound pressure level in resonating cavity is analyzed. The results indicate that the acoustic performance of the infrasound experiment system is satisfactory. It can Be used for studying the effects of infrasound on human Beings.
