Distribution of Acoustic Impedance in Cortical Bone Evaluated by Ultrasonic Reflection Coefficient.
نویسندگان
چکیده
منابع مشابه
Manipulating Acoustic Wavefront by Inhomogeneous Impedance and Steerable Extraordinary Reflection
We unveil the connection between the acoustic impedance along a flat surface and the reflected acoustic wavefront, in order to empower a wide wariety of novel applications in acoustic community. Our designed flat surface can generate double reflections: the ordinary reflection and the extraordinary one whose wavefront is manipulated by the proposed impedance-governed generalized Snell's law of ...
متن کاملUltrasonic assessment of children’s cortical bone anisotropy
Child cortical bone tissue is rarely studied because of the difficulty of obtaining samples. Yet the preparation and ultrasonic characterization of the small samples available, while challenging, is one of the most promising ways of obtaining information on the mechanical behavior of non-pathological children’s bone. We investigated children’s cortical bone obtained from chirurgical waste. Stif...
متن کاملReflection of an acoustic line source by an impedance surface with uniform flow
An exact analytic solution is derived for the 2D acoustic pressure field generated by a time-harmonic line mass source located above an impedance surface with uniform grazing flow. Closed-form asymptotic solutions in the far-field are also provided. The analysis is valid for both locally-reacting and nonlocally-reacting impedances, as is demonstrated by analysing a nonlocally reacting effective...
متن کاملAcoustic Force Distribution in Resonators for Ultrasonic Particle Separation
The effectiveness of particle -liquid separation by ultrasonic radiation forces depends on the acoustic energy density distribution in the standing-wave field. The energy distribution in an ultrasonic particle-separation device was analyzed to assist continued optimization and design efforts. Measurements of the energy-density distribution in the liquid using a microscope-based imaging system w...
متن کاملReflection Coefficient Estimation by Pseudospectrum Matching
This paper presents a novel model-based method for in-situ estimation of sound reflection coefficients in acoustic enclosures. The method uses a modeling engine for simulation of acoustic propagation and generation of the spatial pseudospectrum using a beamforming technique. The simulated pseudospectrum is matched with the measured pseudospectrum acquired by a real beamforming microphone array ...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: TRANSACTIONS OF THE JAPAN SOCIETY OF MECHANICAL ENGINEERS Series A
سال: 1999
ISSN: 0387-5008,1884-8338
DOI: 10.1299/kikaia.65.2463