Acoustic Characteristics of Snow Layer (Sekisetsu no Onkyo Tokusei)

• Main Author: Ishida,T
• Other Authors: COLD REGIONS RESEARCH AND ENGINEERING LAB HANOVER N H
• Format: Text
• Language: English
• Published: 1976
• Subjects: Snow; Ice and Permafrost; Acoustics; *SNOW; *ACOUSTIC ATTENUATION; WHITE NOISE; JAPAN; SNOW COVER; TRANSLATIONS; BANDPASS FILTERS; TRANSMISSION LOSS; SOUND GENERATORS; Snow tunnel; Ice; permafrost
• Online Access: http://www.dtic.mil/docs/citations/ADA032059; http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=ADA032059

Using white noise, the transmission loss of fallen snow samples was measured. The attenuation coefficient of sound within fallen snow was measured from this. In addition, the sound sites of a level, fresh snow surface and of a compact snow tunnel and snow trench were studied and the attenuation coefficients at these snow surfaces were found. The frequency characteristics of the attenuation coefficient of a fallen snow sample and a snow surface had the same tendencies as the sound absorption characteristics of the samples. In addition, the attenuation at a fresh snow surface was about 1/100 that of the attenuation within a sample of compact snow. These samples will serve as references for acoustic design in snow regions and the TL characteristics of fallen snow samples have a close relation to the structure. This will serve as an indicator of the structure of fallen snow. Draft trans. of Low Temperature Science (Japan) v22 p59-72 1964.