Limiting capability of one-dimensional acoustical black hole
An example of an acoustical black hole for flexural waves is the rod, sharpened according to parabolic law. An exact solutions for the black hole equation in the form of power functions gives, in particular, an exact lower boundary of the frequency band where the absorption exists.
The report discusses the question about correlation between the mass of damped structure and mass of the damping black hole ensured the absence of natural frequencies with pure real values. As an example a homogeneous rod of finite length is taken as a damped structure.
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Document Type: Research Article
Affiliations: Andreyev Acoustics Institute, Russian Federation
Publication date: 07 December 2017
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