Issue |
Europhys. Lett.
Volume 50, Number 2, April II 2000
|
|
---|---|---|
Page(s) | 280 - 281 | |
Section | Condensed matter: electronic structure, electrical, magnetic, and optical properties | |
DOI | https://doi.org/10.1209/epl/i2000-00267-5 | |
Published online | 01 September 2002 |
Comments on “On `hearing the shape of drums': An experimental study using vibrating smectic films”
School of Science, Griffith University, Nathan - Queensland 4111, Australia
Received:
6
December
1999
Accepted:
10
February
2000
We point out that one of a pair of isospectral shapes subjected to a certain intentionally altered building scheme would be expected to lose isospectrality because of the mathematical form of a relevant spectral function expansion which involves angles. A higher “calibration” mode which has common exactly specified eigenfrequency for all three shapes is mentioned.
PACS: 02.30.Jr – Partial differential equations / 03.65.Ge – Solutions of wave equations: bound states / 43.40.Dx – Vibrations of membranes and plates
© EDP Sciences, 2000
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