منابع مشابه
Elastic Helmholtz resonators
The influence of wall elasticity on the response of a Helmholtz resonator is examined by analyzing the canonical case of a thin elastic spherical shell with a circular aperture subject o plane wave excitation. By neglecting the thickness of the wall and representing the elasticity via a "thin shell" theory the problem is reduced to one of solving an integral equation over the aperture for the p...
متن کاملCircular concentric Helmholtz resonators
The effect of specific cavity dimensions of circular concentric Helmholtz resonators is investigated theoretically, computationally, and experimentally. Three analytical models are employed in this study: ~1! A two-dimensional model developed to account for the nonplanar wave propagation in both the neck and the cavity; ~2! a one-dimensional solution developed for the limit of small cavity leng...
متن کاملTwo-dimensional sonic crystals with Helmholtz resonators.
We present a type of sonic crystal composed with an array of two-dimensional Helmholtz resonators, which in the long-wave regime have both a high relative acoustic refractive index n and at the same time, a small acoustic impedance Z mismatch with air for airborne sound. We analyze the n and Z of such sonic crystals by finite-difference time-domain simulations, and by mapping our results to a c...
متن کاملLoss-improved electroacoustical modeling of small Helmholtz resonators.
Modeling of small Helmholtz resonators based on electroacoustical analogies often results in significant disagreement with measurements, as existing models do not take into account some losses that are observed in practical implementations of such acoustical circuits, e.g., in photoacoustic Helmholtz cells. The paper presents a method which introduces loss corrections to the transmission line m...
متن کاملContinuum elastic modeling of graphene resonators.
Starting from an atomistic approach, we have derived a hierarchy of successively more simplified continuum elasticity descriptions for modeling the mechanical properties of suspended graphene sheets. We find that already for deflections of the order of 0.5 A a theory that correctly accounts for nonlinearities is necessary and that for many purposes a set of coupled Duffing-type equations may be...
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ژورنال
عنوان ژورنال: The Journal of the Acoustical Society of America
سال: 1992
ISSN: 0001-4966
DOI: 10.1121/1.404517