sound propagation

While the discussion probing the physics of microwaves and sound propagation dimmed in my mind to background noise, an epiphany flashed.

Sound outside the range of human hearing—The physics of sound propagation and the existing medical literature do not support the concept of a weapon that uses sound waves above or below the audible range.

They also performed experimental tests and mathematical modeling of sound propagation and attenuation through walls and windows.

Hughes says that he eventually hopes to be able to replicate the cicada's sound propagation efficiency, sending loud sounds long distances at low power with a small device.

Gannon says the study "helps our understanding of the complex nature of sound propagation in shallow estuaries."