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Sensors that Control Electric Circuits
Electromechanical Transducers for Airborne Sound
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acoustic airborne sound algebraic sign amplitude analysis angle angular velocity apply approximation attenuation beam bending waves blocking mass boundary conditions circuit coefficient components constant corresponding critical frequency cross-section curve damping depends determine direction discussed displacement distribution elastic electrical energy example excitation point expression field variables finds finite floating floor function incident increases indicated infinite interlayer layer longitudinal waves loss factor measured mechanical impedance membrane modulus motion natural frequencies nearfield obeys obtains occur oscillator parameter phase velocity phasor plane plate point impedance propagation quasi-longitudinal waves quency radiation efficiency ratio reflection region relation represents resonance frequency rotational sample sensor shear stresses shown sinusoidal sound pressure spatial stiffness structure-borne sound structures surface test object thickness tion torsional transducer transmission efficiency transmission loss transverse waves vanish vibrations view of Eq voltage wall wave equation wavelength wavenumber