The Velocity of Sound

Sound velocity in carbon suboxide.

Influence of Aging Temperature on Mechanical Properties and Sound Velocity in Maraging Steel M350

In the present work, the influence of aging temperature on mechanical properties and sound velocity of Maraging steel M350 was investigated. For this purpose, first, samples were solution annealed at 825◦C for 2 hours and then age hardened at 510◦C-600◦C for 3 hours. Hardness, tensile and impact tests were used for determining mechanical properties and longitudinal ultrasonic velocity was used ...

Sound field separation with sound pressure and particle velocity measurements.

In conventional near-field acoustic holography (NAH) it is not possible to distinguish between sound from the two sides of the array, thus, it is a requirement that all the sources are confined to only one side and radiate into a free field. When this requirement cannot be fulfilled, sound field separation techniques make it possible to distinguish between outgoing and incoming waves from the t...

Velocity of sound in the relic photon sea

We determine the velocity of sound in the blackbody gas of photons and in the gas of relic photons. Derivation is based on the thermodynamic theory of the photon gas and the Einstein relation between energy and mass. The spectral form for the n-dimensional blackbody is derived. The 1D, 2D and 3D blackbody radiation is specified. It is mentioned the possibility of creation of the Mach cone in ca...

Lidar Remote Sensing of Sound Velocity in the Ocean

Our goal is the rapid and accurate measurement of upper-ocean vertical sound velocity (and hence temperature) profiles in the ocean. The objective is to obtain range resolved (»1 m) measurements of temperature and sound velocity over a range of »100 m at an accuracy of 0.1°C and 0.2 m/s, respectively. To this end we are developing an innovative Brillouin LIDAR concept. Present results provide c...