Meteorological attenuation determination method in air

摘要

The method involves using beam model where none linear variations in the velocity of sound with height are accounted for using a parabolic term in the equation for the expansion of foreign particles in air. A technical process for measurement of the propagation of sound in air is determined which takes into account the wind direction and velocity as well as the air calmness. Determination of the meteorological attenuation at a plotted point, A, with respect to sound emitted from a sound source at another point, Q, assumes that the sound beam travels with a parabolic path from Q to A. Equipment for the measurement of various physical quantities such as heights, distances, sound paths and ambient conditions are needed as are processor, storage and analysis program.