Propagation of Sound in Matter.
Abstract
The most important results of three contract projects are described. (I) Self-Trapping Hydrodynamic Soliton: Our major effort here has been to measure the amplitude dependent properties of the soliton. (II) Subharmonics, Bifurcations, Quasiperiodicity and Chaos in Continuous Media: In our first publication of our results in the Fall of 1981 we reported observing many subharmonic spectra and most of the fundamental subharmonics had frequencies which could not be reached by a period doubling cascade out of an observed group of 16 only 3 could be reached by period doubling. Robert Keolian has made many, many more measurements since then and the situation remains unchanged. (III) Sound Propagation In Superfluid Helium With Partially Locked Normal Component: We would like to use our extensive past experience with this mode to measure the details of the transition from ordinary (or first) sound propagation to fourth sound propagation. We expect that the results will be of great interest to the general problem of the multiple scattering of sound in a random porous medium. Originator-supplied keywords include: Solitons, Subharmonics, Quasiperiodic, Phase lock porous media, 1st and 4th sound, Superfluid, Sound scattering.
Document Details
- Document Type
- Technical Report
- Publication Date
- Dec 31, 1984
- Accession Number
- ADA151052
Entities
People
- I. Rudnick
Organizations
- University of California, Los Angeles