Hermann E R, Hesse C S, Hoyle E R, Leopold A C, Standard J J
Am Ind Hyg Assoc J. 1979 May;40(5):427-35. doi: 10.1080/15298667991429787.
Scientific establishment of the no-effect response to finite levels of exposure to a physical or chemical agent is indeed a rigorous exercise and is frequently controversial. In earlier research by Slutsky under direction of the senior author, a statistically significant increase in stereoscopic depth perception error was noted among 24 test subjects exposed to high intensity noise. Additional extensive research reported in this paper indicates that error in stereoscopic depth perception is not significantly altered by exposure to continuous white noise of short duration at levels ranging from 70 to 115 dBA. Furthernore, exposure of humans for periods of a few minutes to white noise in octave bands centered on 250 Hz, 1000 Hz, 4 kHz and 16 kHz at 115 dB does not affect their depth perception measured by the Howard-Dolman test. A comprehensive analysis of depth perception errors measured under noise exposure conditions (n = 4040) in comparison with those obtained under control conditions (n = 1430) produced a mean change in error of -0.38 mm, a statistically insignificant difference (p = 0.17). Even if such an error were attributable to high level noise, it should be noted that minus sign designates an improvement of depth perception in noise and that it is difficult to imagine visual tasks in which change in error of +/-0.38 mm at a distance of 6.0 meters is meaningful.
科学地确定对有限水平的物理或化学制剂暴露的无效应反应确实是一项严谨的工作，并且经常存在争议。在资深作者指导下，斯卢茨基早期的研究中，在24名暴露于高强度噪声的测试对象中，立体深度感知误差出现了统计学上的显著增加。本文报道的进一步广泛研究表明，暴露于70至115分贝（A）的短时长连续白噪声中，立体深度感知误差不会显著改变。此外，让人类在115分贝下暴露于以250赫兹、1000赫兹、4千赫兹和16千赫兹为中心的倍频程带中的白噪声几分钟，并不会影响通过霍华德 - 多尔曼测试测量的他们的深度感知。对在噪声暴露条件下测量的深度感知误差（n = 4040）与在对照条件下获得的误差（n = 1430）进行综合分析，得出误差的平均变化为 -0.38毫米，这是一个统计学上不显著的差异（p = 0.17）。即使这样的误差可归因于高强度噪声，也应该注意到负号表示在噪声中深度感知有所改善，并且很难想象在哪些视觉任务中，在6.0米的距离处误差变化±0.38毫米是有意义的。
