This paper considers diffraction of spherical waves on soft, hard, and impedance spheres. Radius of the sphere is assumed to be small compared to acoustic wavelength. Simple uniform asymptotic ...

An engine powered entirely by sound waves — no fuel, no combustion, just pure vibration doing the work. It sounds crazy, but here’s how this mind-blowing tech actually works!

However, during an inversion, when air temperatures increase with altitude instead of decreasing, sound waves can be deflected toward the ground, amplifying the thunder. This phenomenon is more common ...

Sound Waves, their Shape and Speed: a Description of the Phonodeik and its Applications and a Report on a Series of Investigations made at Sandy Hook Proving Ground. By Prof. Dayton Clarence Miller.