Time-varying resonators in acoustic waveguides: a transfer matrix formalism for space-time-modulated metamaterials

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216224%3A14310%2F25%3A00142581" target="_blank" >RIV/00216224:14310/25:00142581 - isvavai.cz</a>

Result on the web

<a href="https://royalsocietypublishing.org/doi/full/10.1098/rspa.2025.0303" target="_blank" >https://royalsocietypublishing.org/doi/full/10.1098/rspa.2025.0303</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1098/rspa.2025.0303" target="_blank" >10.1098/rspa.2025.0303</a>

Result language

angličtina

Original language name

Time-varying resonators in acoustic waveguides: a transfer matrix formalism for space-time-modulated metamaterials

Original language description

The transfer matrix method remains a simple yet powerful tool for modelling acoustic systems, particularly in a closed waveguide geometry. Here, we present a generalization of this method based on the theory of mode-matching, that incorporates the effect of ultra-fast temporal variations in the geometry, applying it to a system of side-branching resonant cavities (quarter wavelength resonators) fixed to an acoustic waveguide, modulated through alteration of the cavity length. We calculate propagation in a waveguide containing both a single resonator and a periodic array. In particular, we predict the generation of additional Doppler-like terms in the reflected and transmitted fields that leads to the modification of the band structure, comparing our results to finite element simulations of space-time-modulated acoustic crystals.

Czech name

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Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

—

OECD FORD branch

10300 - Physical sciences

Project

—

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2025

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences

ISSN

1364-5021

e-ISSN

1471-2946

Volume of the periodical

481

Issue of the periodical within the volume

2324

Country of publishing house

GB - UNITED KINGDOM

Number of pages

20

Pages from-to

1-20

UT code for WoS article

001603029700005

EID of the result in the Scopus database

2-s2.0-105023887221