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Acoustic resonance is a phenomenon in which an acoustic system amplifies sound waves whose frequency matches one of its own natural frequencies of vibration (its resonance frequencies). The term "acoustic resonance" is sometimes used to narrow mechanical resonance to the frequency range of human hearing, but since acoustics is defined in ...
Industrial application areas of thin film bulk acoustic resonators include high-frequency signal filtering (e.g. for mobile telecommunication devices), crystal replacements, energy harvesting, sensing, sound emission (e.g. in hearing aids) and as part of mechanical qubits. [3] [4] [5] [6]
Acoustic resonance technology (ART) is an acoustic inspection technology developed by Det Norske Veritas over the past 20 years. ART exploits the phenomenon of half-wave resonance, whereby a suitably excited resonant target (such as a pipeline wall) exhibits longitudinal resonances at certain frequencies characteristic of the target's thickness.
A resonator is a device or system that exhibits resonance or resonant behavior. That is, it naturally oscillates with greater amplitude at some frequencies, called resonant frequencies, than at other frequencies. The oscillations in a resonator can be either electromagnetic or mechanical (including acoustic). Resonators are used to either ...
The definition of Q since its first use in 1914 has been generalized to apply to coils and condensers, resonant circuits, resonant devices, resonant transmission lines, cavity resonators, [5] and has expanded beyond the electronics field to apply to dynamical systems in general: mechanical and acoustic resonators, material Q and quantum systems such as spectral lines and particle resonances.
In forced resonance, the resonator starts vibrating because it is in physical contact with a vibrating body, which "forces" the resonator to replicate its oscillations. [5] Both types of resonance are at work in the human voice during speaking and singing. Much of the vibration felt by singers while singing is a result of forced resonance.
Here Z F is the acoustic impedance of the film (Z F = ρ F c F = (ρ F G f) 1/2)= (ρ F /J f) 1/2), k F is the wave vector and d F is the film thickness. J f is the film's viscoelastic compliance, ρ F is the density. The poles of the tangent (k F d F = π/2) define the film resonances. [55] [56] At the film resonance, one has d F = λ/4. The ...
Experimental image of surface acoustic waves on a crystal of tellurium oxide [1]. A surface acoustic wave (SAW) is an acoustic wave traveling along the surface of a material exhibiting elasticity, with an amplitude that typically decays exponentially with depth into the material, such that they are confined to a depth of about one wavelength.