In the late 19th century, for example, there was a Susy-like hunt for the luminiferous aether, which almost all physicists then believed pervaded space and propagated light in the way that air propagates sound.
A reverse indoor-to-outdoor testing method involving propagating sound from an interior diffuse field to an exterior free field was first implemented at an existing field site.
Structural health, wear states and damage levels can be recognized by means of the vibration spectrum generated by propagating sound waves in solid materials known as 'acoustic emission'.
Two theoretical treatments concerning the transmission of internally propagated sound at low frequencies through the walls of "flat-oval" ducts are described.
It should also be noted, according to the company, that "the side wings play a vital role in propagating sound vibrations down from the combs to the naturally amplifying resonant base, manufactured by JMC Lutherie".
The tiny acoustic bubbles, produced by the propagating sound wave, enclose an incredible facility where matter interact among at energy as high as 13 eV to spark extraordinary chemical reactions.
It has been concluded that the absorption of low-frequency acoustic power is due to non-linear propagation effects, and that its magnitude depends on the porosity of the termination and the intensity of the propagating sound wave.
The first is acoustic streaming in which momentum from directed propagating sound waves is transferred to the liquid, causing the liquid to flow in the direction of the sound propagation [ 11].
In continuous elastic media, pressure and density propagate as sound waves when the media are excited.
(It had been suggested by the American mathematician and astronomer John Winthrop, following his experience of the "Boston" earthquake of 1755, that the ground shaking was due to a disturbance propagated like sound through the air).
