Insertion loss in octave bands was measured for 14 residences in upstate New York using a carefully developed procedure similar to ASTM E336-71 A1.2. Although other dwelling attenuation data are available [e.g., House Noise-Reduction Measurements for Use in Studies of Aircraft Flyover Noise, Soc. Automative Engrs., AIR 1081; Oct. 1971] none was clearly applicable to rural areas of upstate New York and to sources of noise located near the ground. The source was simulated by a three-speaker array using broadband noise. Attenuation of transmission line noise was derived mathematically by applying the measured octave-band attenuations to a typical broadband transmission line noise spectrum and converting to A-weighted and sound levels. Average attenuation was about 15 dBA with windows open 2 ft2, and about 30 dBA with windows closed. [The study was conducted by Rochester Gas and Electric Corporation and their consultant Bolt Beranek and Newman in consultation with the New York State Departments of Public Service and Environmental Conservation.]
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