HYDROACOUSTICS
ANNUAL JOURNAL |
START | NEW VOL 20 | SEARCH | STATISTICS | PAS - GDANSK DIVISION |
pp. 145-158, vol. 16, 2013 Henryk Lasota Gdańsk University of Technology, Gdansk, Poland Key words: local effects; acoustic wave phenomena Abstract: Acoustic and electromagnetic wave phenomena may seem to have a proper formal representation
in field theory dating from the 19th century, founded on the mathematics of complex
functions. This paper shows, however, that when replacing the classical spectrum-domain approach
related to the assumption of harmonic timeform of signals, with a time-domain approach
imposing no restriction as to the class of time evolution of source and field signals, it is possible to
perform such a description of physical effects and their local, causality-driven mechanisms, that
results in new revelations as to the role of both the physical medium and the wave source in initiating
and conveying phenomena, otherwise perfectly familiar, that carry energy and preserve
signal waveform. It appears that causality and locality are a core of dynamic linear phenomena
in physical continua, leading to the creation of doubly-dynamic states that are observed, at the
approach, in “frozen” conditions.
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