Abstract
The Mill Race experiment is used as an example to demonstrate the possibility of calculating the propagation characteristics of acoustic impulses generated by surface point explosions up to ionospheric heights with the use of the models that are based on the known exact solutions for homogeneous media with corrections for inhomogeneity. It is shown that, in the terrestrial atmosphere, the height where the amplitude of the particle velocity of an acoustic impulse reaches its maximum is independent of both the explosion power and the angle of departure of an acoustic ray. This height is about 120 km and depends mainly on the vertical atmospheric density profile.