A team of researchers have developed "audible enclave" technology that creates pockets of sound that can be heard at a ...

The difference is in how the carrier wave is modulated, or altered. With AM radio, the amplitude, or overall strength, of the signal is varied to incorporate the sound information. With FM ...

Sound is a vibration that travels through air as a wave. These waves are created when an object moves back and forth, compressing and decompressing air molecules. The frequency of these vibrations ...

For water waves and sound waves the unit hertz is usually good enough but radio and TV waves have such a high frequency that the kilohertz (\(kHz\)) or even the megahertz (\(MHz\)) are better units.

Collaboration between institutions in the Netherlands, Germany, Switzerland, and Austria, researchers have created a new metamaterial that has significance in acoustics. The work is the world’s ...