Journal ArticleDOI
Ultra high frequency acoustic waves
Reads0
Chats0
TLDR
In this article, two different experimental techniques are available for making ultra-high-frequency acoustic measurements: light-scattering (for solids and liquids), and the use of microwaves (so far mainly restricted to solids).Abstract:
Two different experimental techniques are available for making ultra-high-frequency acoustic measurements. These are (i) the study of light-scattering (for solids and liquids), and (ii) the use of microwaves (so far mainly restricted to solids). The first method does not require an acoustic source or generator, but makes use of the natural Debye waves; the results show that for someliquids it is possible to observe the effects of non-elastic molecular collisions. The second method has so far been applied chiefly to quartz, but is already yielding some information on the nature of the anharmonic interactions between atoms in a crystal.read more
Citations
More filters
Microwave acoustics
S.W. Tehon,S. Wanuga +1 more
TL;DR: In this paper, the fundamental characteristics of acoustic wave propagation in crystanine media are discussed, with a review of experimental techniques and results, and a basic analysis of plane wave piezoelectric coupling is presented.
Journal ArticleDOI
Acoustic Velocity Dispersion in some Non-associated Organic Liquids
TL;DR: In this paper, the Brillouin effect was used to enable measurements of acoustic velocity at frequencies above the conventional ultrasonic range, namely, above 109 c/s, for the first time.
Journal ArticleDOI
Radiation pressure of thermal waves in liquids: A direct measurement
TL;DR: In this paper, it has been suggested that this radiation pressure is the physical cause of the puzzling phenomenon of thermal diffusion in liquids and that the forces produced by radiation pressure can be observed directly and easily measured.
Journal ArticleDOI
Ultra-high-frequency acoustic velocity in liquid paraffins and olefines
TL;DR: In this article, the acoustic velocity in some liquid paraffins and olefines has been determined at frequencies of the order of 4 Gc/s using an optical technique depending on the Brillouin effect.
References
More filters
Journal ArticleDOI
Diffusion de la lumière et des rayons X par un corps transparent homogène - Influence de l'agitation thermique
Journal ArticleDOI
The Origin of Ultrasonic Absorption in Water
TL;DR: In this paper, a relaxation treatment is applied to the structural component of compression on the assumption of two molecular states of packing, and the relaxation time associated with the process is found to be of the order of ${10}^{\ensuremath{-}12}$ second for water.
Related Papers (5)
The coupled modes of acoustic waves and drifting carriers in piezoelectric crystals
Kjell Blotekjaer,C.F. Quate +1 more