Acoustic Casimir effect
Holmes, Christopher David
Denardo, Bruce C.
MetadataShow full item record
In 1948, Hendrick Brugt Gerhard Casimir predicted that two closely spaced uncharged conducting plates in vacuum would be mutually attracted. This attractive force is an indirect manifestation of the quantum electromagnetic zero point field (ZPF). When the indirect manifestations of the ZPF are interpreted as due to radiation pressure, acoustic noise can provide an excellent analog to investigate the Casimir effect as well as other effects due to the ZPF. Force measurements between two parallel plates are performed in an acoustic chamber with a broadband noise spectrum within a 5-15 kHz band and an intensity of 133 dB (re 20 %Pa). When the results are compared with the appropriate theory, very good agreement is obtained. Applications of the acoustic Casimir effect to noise transduction can provide new means to measure background noise. Because attractive or repulsive forces can be obtained by adjusting the noise spectrum or the plate geometry, a non-resonant method of acoustic levitation is also suggested
Approved for public release; distribution is unlimited.
Showing items related by title, author, creator and subject.
Reeder, D.B. (2014);Investigations of near-shore and in-shore environments have, rightly, focused on geological, thermodynamic and hydrodynamic parameters. A complementary acoustical characterization of the estuarine environment provides ...
Simulation of the acoustic pulse expected from the interaction of ultra-high energy neutrinos and seawater Gruell, Michael S. (Monterey, California. Naval Postgraduate School, 2006-03);The purpose of this thesis was to design, build, and test a device capable of simulating the acoustic pulse expected from the interaction between an Ultra-High Energy (UHE) neutrino and seawater. When a neutrino interacts ...
Field observation of low-to-mid-frequency acoustic propagation characteristics of an estuarine salt wedge Reeder, D. Benjamin (2016-01-04);The estuarine environment often hosts a salt wedge, the stratification of which is a function of the tide’s range and speed of advance, river discharge volumetric flow rate, and river mouth morphology. Competing effects ...