Instantaneous heartbeat detection is a key parameter in modern vital sign monitoring. Continuous wave (CW) radar systems enable contactless measurements of the vibrations on the human skin effected by ...

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 ...

This engine runs on sound waves! Jeff Bezos changes his wedding plans amid protests in Venice NASA Unveils Breathtaking New Images of Andromeda Galaxy Republicans are calling on Trump to revoke ...