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Record Details

Record 3 of 8679
Acoustic Ground-Impedance Meter
Author and Affiliation:
Zuckerwar, A. J.
Abstract: Helmoltz resonator used in compact, portable meter measures acoustic impedance of ground or other surfaces. Earth's surface is subject of increasing acoustical investigations because of its importance in aircraft noise prediction and measurment. Meter offers several advantages. Is compact and portable and set up at any test site, irrespective of landscape features, weather or other environmental condition.
Publication Date: May 01, 1983
Document ID:
19820000303
(Acquired Nov 04, 1995)
Accession Number: 82B10303
Subject Category: MECHANICS
Report/Patent Number: LAR-12995
Document Type: NASA Tech Brief
Publication Information: NASA Tech Briefs (ISSN 0145-319X); 7; 2; P. 181
Publisher Information: United States
Financial Sponsor: NASA; United States
Organization Source: NASA Langley Research Center; Hampton, VA, United States
Description: In English
Distribution Limits: Unclassified; Publicly available; Unlimited
Rights: No Copyright
NASA Terms: ACOUSTIC IMPEDANCE; ACOUSTIC MEASUREMENT; EARTH SURFACE; NOISE MEASUREMENT; SOUND PRESSURE
Availability Source: National Technology Transfer Center (NTTC), Wheeling, WV
Availability Notes: See Also NASA TM-83227 (N82-17476/TB)
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