著者

大浦 浩文

出版者

The Japanese Society of Snow and Ice

雑誌

雪氷 (ISSN:03731006)

巻号頁・発行日

vol.12, no.3, pp.7-9, 1950-11-25 (Released:2009-09-04)

参考文献数

1

被引用文献数

1 1

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The reflection of sound at the snow surface were observed with the method of standing wave. If the amplitude of incident wave is a, and that of reflected wave is b, then the maximum amplitude of standing wave is a+b, and the minimum is a-b. These values a+b and a-b were measured with the carbon microphone and the Brown tube. From these values the rate of absorption A= (a2-b2)/a2 were calculated. The results were shown in Table 1. and Fig. 1.From these results the following were known.1. The rate of absorption A is considerably large.2. The smaller the density, the larger the absorption.3. For the settled snow, the higher the frequency of sound, the larger the absorption.4. For the settled snow, when the snow were warmed and wetted, the absorption increased.