Shenai J P, Johnson G E, Varney R V
Pediatrics. 1981 Jul;68(1):55-7.
Mechanical vibration encountered in land transports was assessed objectively through measurement of vertical acceleration experienced by neonates in transit. Vibration was most predominant in the hazardous low frequency range of 3 to 18 Hz. The peak acceleration amplitudes (intermittent thrusts) ranged from 5 to 13 m/sq sec. The root mean square acceleration (averaged vibration) ranged from to 6 m/sq sec. These vibration levels are high when compared with adult vibration tolerance limits, and may jeopardize the safety of the transported infants, particularly in long-distance transports. Further research is needed to understand the possible effects of mechanical vibration in neonates and to define safe vibration thresholds in all modes of transport. Careful-evaluation of vibratory stress and its attenuation in newer designs of transport equipment may be desirable to enhance the safety of the transported infants.
通过测量新生儿在运输过程中所经历的垂直加速度，客观评估陆地运输中遇到的机械振动。振动在3至18赫兹的危险低频范围内最为显著。峰值加速度幅度（间歇性推力）范围为5至13米每二次方秒。均方根加速度（平均振动）范围为至6米每二次方秒。与成人振动耐受极限相比，这些振动水平较高，可能会危及运输中婴儿的安全，尤其是在长途运输中。需要进一步研究以了解机械振动对新生儿可能产生的影响，并确定所有运输方式中的安全振动阈值。对运输设备新设计中的振动应力及其衰减进行仔细评估，可能有助于提高运输中婴儿的安全性。
