 | United States. Office of Noise Abatement and Control - 1971 - 488 pages
...achieve the final part of the noise reduction goal. The tests at Lewis will begin in the Spring of 1972. Propagation Noise Research Studies are being conducted...representative locations in the USA are underway to provide a statiscal representation of temperature, humidity, and wind gradients. Receptor Noise Research The... | |
 | United States. Congress. House. Committee on Science and Astronautics - 1972 - 1448 pages
...are given in the following by Center. Contracts. $, K Total 9.694 10,370 FLIGHT PATH NOISE RESEARCH Meteorological studies of the lower 1000 meters of...the atmosphere in several representative locations within the USA are being continued to provide a staistical representation of temperature, humidity,... | |
 | United States. Office of Noise Abatement - 1970 - 258 pages
...eleven months. Atmospheric Propagation A study is being conducted by Bolt Beranek and Newman, Inc. to correlate flyover noise data recordings, aircraft...several representative locations in the USA are underway by Environmental Science Service Administration (now National Oceanic Atmospheric Administration) and... | |
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PROPAGATION NOISE RESEARCH Studies are being conducted to closely correlate fly-over noise data recordings, aircraft position information, and atmospheric propagation losses over the audible frequency range. Meteorological studies of 'the lower 1000 meters... 