What is a Jewish baby naming ceremony? This is a brief ceremony during which the baby is given his or her Hebrew name. The chosen Hebrew name could be a name that sounds like the baby's secular/English name, or one that begins with the same sound as the baby's secular/English name.
For  radio waves and light waves  â scroll down â. Conversion: frequency f to wavelength Î» and wavelength to frequency. The speed of propagation c can be the speed of sound *or* the speed of light and radio waves. Sound waves are waves which propagate vibrations of air molecules.
The propagation of an acoustic wave through a solid polymer can be characterised by two parameters: sound velocity and sound absorption. Sound speed, u (in m/s) is the rate at which sound waves travel through the medium. Sound absorption or attenuation Î± (in dB/m) is a measure of the loss of energy of the sound wave as it travels through the medium: the energy of the sound wave is converted into thermal motions or heat, but usually with a negligible rise of temperature only.