船上实验次声发生装置声场特征研究

A study of the characteristic of infrasound-generator field on the ships

目的 测量分析某型次声发生装置在船上工作时的声场分布特征 ,为开展次声生物效应及防护措施的研究提供依据。方法 次声发生装置在船上连续工作 6 h,用 BK2 2 31型精密积分声级计、BK16 2 7型次声滤波器、BK4 15 6型电容传声器和挪威 84 0型实时分析仪对次声场进行测量分析。结果 次声发生装置工作时主要舱室和工作位置的线性声压级为 95 .6～ 118.5 d B,A计权声级为 71.1～112 .3d BA,次声级为 92～ 117d B,G1 次声计权声压级为 97.8～ 12 5 .0 d B,G2 次声计权声压级为 89.7～119.5 d B。其中多数舱室和工作位置的次声级为 10 5～ 117d B,少数为 92～ 10 4 d B,次声的频谱能量主要集中在 12 .5 ,16 .0 ,2 0 .0 Hz。结论 该范围强度次声有可能对船员造成不同程度的影响。

Objective To observe the characteristics of infrasound generator field on the ship,and to provide foundation for the study of infrasound biological effect and protection. Methods Infrasound generator was made to operate on the ship for 6 h,and the infrasound field were measured by a series of BK instruments(type 2231 precision sound level meter,type 1627 infrasound filter set,type 4156 condenser microphone,and type 840 real time analyzer). Results While the infrasound generator was operating,the infrasound levels in the cabins were 92~117 dB;the linear sound pressure levels were 95.6~118.5 dB;the A weighting sound levels were 71.1 ~112.3 dB; the G 1 were 97.8~125.0 dB;the G 2 were 89.7~119.5 dB.In most of the cabins and work stations the infrasound levels were 105~117 dB,and only in a few areas were 92~104 dB,with the main spectrum energy at 12.5,16.0,and 20.0 Hz. Conclusions To some extent the infrasound levels may do harm to the crew members.