The High Speed Water Tunnel is operated by the California Institute of Technology under Contract OEMsr-207 and is sponsored by Division 6, Section 6.1 of the NDRC of the OSRD. The experiments reported in this memorandum were requested by the office of the Chief of Section 6.1.ududThe report presents the results of preliminary measurements of the sound produced in the 20 to 100 kilocycle frequency range by cavitating projectiles in the Water Tunnel working section. Measurements were made of the noise intensity in the 20-100 kilocycle frequency band with three different projectiles. Measurements of the intensity and distribution of the noise within this band were made with one of these projectiles.
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机译：高速水隧道由加州理工学院根据OEMsr-207合同运营，由OSRD国家发改委第6.1节第6部赞助。本备忘录中报告的实验是6.1节院长办公室要求的。 ud ud报告介绍了通过在水隧道工作区中空化弹丸而在20至100千瓦频率范围内产生的声音的初步测量结果。 。测量了20-100千瓦频段内三种不同弹丸的噪声强度。用这些弹丸之一测量了该频带内噪声的强度和分布。
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