Abstract：
:Knowing the low-frequency response of hydrophones, down to 100 kHz at least, is important for accurate biomedical ultrasound measurements. However, current international standards do not extend below 500 kHz. Furthermore, commercial hydrophone sources typically do not supply sensitivity data below 1-2 MHz. Therefore, to help identify and validate practical calibration methods below 2 MHz, the authors have extended their previous individual efforts in an interlaboratory evaluation of sensitivity calibration using the swept-frequency technique, time delay spectrometry (TDS). Calibrations were performed for needle and membrane PVDF hydrophones using each laboratory's TDS system. Each site employed the same purpose-built broadband source transducers, comprising both plano-concave and biconcave 1-3 piezocomposite elements 4 cm in diameter, with maximum and minimum thicknesses of approximately 1.5 and 0.1 cm. Agreement between laboratories was within the estimated measurement precision of +/-0.6 dB. The results demonstrated that a TDS system employing such transducers constitutes a viable method for hydrophone calibrations in this frequency range.
journal_name
Ultrasonicsjournal_title
Ultrasonicsauthors
Harris GR,Gammell PM,Lewin PA,Radulescu EGdoi
10.1016/j.ultras.2003.12.008subject
Has Abstractpub_date
2004-04-01 00:00:00pages
349-53issue
1-9eissn
0041-624Xissn
1874-9968pii
S0041624X03002300journal_volume
42pub_type
杂志文章相关文献
ULTRASONICS文献大全abstract：:As biotechnology develops, techniques for manipulating and separating small particles such as cells and DNA are required in the life sciences. This paper investigates on-chip manipulation of microparticles in small channels by using ultrasonic vibration. The chip consists of a rectangular glass substrate with a cross-...
journal_title：Ultrasonics
pub_type： 杂志文章
doi：10.1016/j.ultras.2016.11.026
更新日期：2017-08-01 00:00:00
abstract：:Influence of clustering of cavitation bubbles on multibubble sonoluminescence (MBSL) in standing wave fields is studied through measurement of MBSL intensity with a photomultiplier tube and observation of corresponding bubble behavior with a high-speed video camera and an intensified charge-coupled device one. It is c...
journal_title：Ultrasonics
pub_type： 杂志文章
doi：10.1016/s0041-624x(02)00193-2
更新日期：2002-05-01 00:00:00
abstract：:Speckle tracking methods overcome the major limitations of current Doppler methods for flow imaging and quantification: angle dependence and aliasing. In this paper, we review the development of speckle tracking, with particular attention to the advantages and limitations of two-dimensional algorithms that use a singl...
journal_title：Ultrasonics
pub_type： 杂志文章
doi：10.1016/s0041-624x(99)00182-1
更新日期：2000-03-01 00:00:00
abstract：:The present study investigated the effect of geometric parameters of the ultrasound instrument during meat salting in order to enhance salt diffusion and salt distribution in pork meat on a lab scale. The effects of probe size (∅2.5 and 1.3cm) and of different distances between the transducer and the meat sample (0.3,...
journal_title：Ultrasonics
pub_type： 杂志文章
doi：10.1016/j.ultras.2017.03.017
更新日期：2018-02-01 00:00:00
abstract：:Surface and quasi-longitudinal acoustic wave properties have been investigated in potassium titanyl arsenate (KTiOAsO₄, KTA) single crystals for the first time. Surface acoustic wave (SAW) velocity, electromechanical coupling coefficient and power flow angle characteristics have been obtained in rotated Y-cut of KTA c...
journal_title：Ultrasonics
pub_type： 杂志文章
doi：10.1016/j.ultras.2013.09.019
更新日期：2014-02-01 00:00:00
abstract：:Cavitation plays important roles in almost all high-intensity focused ultrasound (HIFU) applications. However, current two-dimensional (2D) cavitation mapping could only provide cavitation activity in one plane. This study proposed a three-dimensional (3D) ultrasound plane-by-plane active cavitation mapping (3D-UPACM)...
journal_title：Ultrasonics
pub_type： 杂志文章
doi：10.1016/j.ultras.2016.04.010
更新日期：2016-07-01 00:00:00
abstract：:The present analysis extends the previous work on the axial acoustic scattering of a high-order Bessel trigonometric beam (HOBTB) from a fluid sphere [F.G. Mitri, J. Appl. Phys. 109 (2011) 014916] to the generalized case of arbitrary scattering from a fluid sphere placed off-axially. The scattered pressure is expresse...
journal_title：Ultrasonics
pub_type： 杂志文章
doi：10.1016/j.ultras.2012.12.008
更新日期：2013-07-01 00:00:00
abstract：:We perform a multiscale analysis of the backscattering properties of a complex interface between water and a layer of randomly arranged glass beads with diameter D=1 mm. An acoustical experiment is done to record the wavelet response of the interface in a large frequency range from lambda/D=0.3 to lambda/D=15. The wav...
journal_title：Ultrasonics
pub_type： 杂志文章
doi：10.1016/j.ultras.2006.05.212
更新日期：2006-11-01 00:00:00
abstract：:Lithium niobate, LiNbO(3), is a piezoelectric material well known for its high Curie temperature. However, it has often been neglected for use in ultrasonic transducers because of its low electro-mechanical coupling coefficients. Recent advances in signal processing have made this disadvantage less significant and we ...
journal_title：Ultrasonics
pub_type： 杂志文章
doi：10.1016/j.ultras.2007.06.001
更新日期：2007-12-01 00:00:00
abstract：:A cylindrical standing wave ultrasonic motor using bending vibration transducer was proposed in this paper. The proposed stator contains a cylinder and a bending vibration transducer. The two combining sites between the cylinder and the transducer locate at the adjacent wave loops of bending vibration of the transduce...
journal_title：Ultrasonics
pub_type： 杂志文章
doi：10.1016/j.ultras.2010.12.007
更新日期：2011-07-01 00:00:00
abstract：:In general, the design and analysis of ultrasonic motor and motor's control strategy are based on mathematical model. The academic model is widely used in the analysis of traveling wave ultrasonic motor (TWUSM). But the dispersive characteristic of piezoelectric ceramics and other complicated process, such as the fric...
journal_title：Ultrasonics
pub_type： 杂志文章
doi：10.1016/j.ultras.2013.09.012
更新日期：2014-02-01 00:00:00
abstract：:Experimental and theoretical studies on degradation of composite-epoxy adhesive joints were carried out on samples having different interfacial and cohesive properties. Oblique incidence ultrasonic inspection of bonded joints revealed that degradation in the adhesive can be measured by significant variation in reflect...
journal_title：Ultrasonics
pub_type： 杂志文章
doi：10.1016/j.ultras.2013.01.014
更新日期：2013-08-01 00:00:00
abstract：:Ultrasound (US) has been used in IMS II (intravascular US) and CLOTBUST (transcranial US) clinical trials for thrombolysis. During the treatment, in addition to the targeted thrombus, other biological components, such as blood and vessel walls are subjected to long durations of US exposure. In this study we explored e...
journal_title：Ultrasonics
pub_type： 杂志文章
doi：10.1016/j.ultras.2006.10.004
更新日期：2007-03-01 00:00:00
abstract：:The Synthetic Aperture Focusing (SAF) technique makes it possible to achieve a higher and more uniform quality of ultrasound images throughout depth, as if both transmit and receive dynamic focusing were applied. In this work we combine a particular implementation of SAF, called Synthetic Transmit Aperture (STA) techn...
journal_title：Ultrasonics
pub_type： 杂志文章
doi：10.1016/j.ultras.2016.11.022
更新日期：2017-03-01 00:00:00
abstract：:Ultrasound image guided brain surgery (UGBS) requires an automatic and fast image segmentation method. The level-set and active contour based algorithms have been found to be useful for obtaining topology-independent boundaries between different image regions. But slow convergence limits their use in online US image s...
journal_title：Ultrasonics
pub_type： 杂志文章
doi：10.1016/j.ultras.2020.106304
更新日期：2021-03-01 00:00:00
abstract：:Explicit integral representations for the wave fields generated by air-coupled or underwater transducers in an acoustic medium with a submerged elastic (metallic or laminate composite) plate are obtained in the form of path Fourier integrals. Together with the far-field asymptotics for the incident, reflected, transmi...
journal_title：Ultrasonics
pub_type： 杂志文章
doi：10.1016/j.ultras.2018.10.001
更新日期：2019-04-01 00:00:00
abstract：:To understand the effect of the sound field on sonochemical luminescence, the exact sound pressure must be determined in each field. In this study it was determined by the Shlieren method, which measures the sound pressure without mixing the sound fields. We compared the efficiency of the sonochemical luminescence in ...
journal_title：Ultrasonics
pub_type： 杂志文章
doi：10.1016/s0041-624x(99)00203-6
更新日期：2000-03-01 00:00:00
abstract：:Several aspects of spectral analysis of bubble transients in Doppler ultrasonic decompression data are discussed. The computation of energy density spectra, using fast Fourier transform techniques for analyzing bubble transients, is described. Spectral analysis of data from probes implanted within animals, using a con...
journal_title：Ultrasonics
pub_type： 杂志文章
doi：10.1016/0041-624x(77)90026-9
更新日期：1977-05-01 00:00:00
abstract：:The effect of a weak surface, near-surface and interfacial inhomogeneity on the frequency dependence of the surface wave velocity and of the SH (shear horizontal) wave reflectivity in isotropic elastic media is studied analytically and numerically. The inhomogeneity is modeled as an infinite planar layer with continuo...
journal_title：Ultrasonics
pub_type： 杂志文章
doi：10.1016/j.ultras.2006.09.001
更新日期：2007-03-01 00:00:00
abstract：:Interference noising originating from the ultrasonic testing defect signal seriously influences the accuracy of the signal extraction and defect location. Time-frequency analysis methods are mainly used to improve the defects detection resolution. In fact, the S-transform, a hybrid of the Short time Fourier transform ...
journal_title：Ultrasonics
pub_type： 杂志文章
doi：10.1016/j.ultras.2013.09.004
更新日期：2014-02-01 00:00:00
abstract：:Exposure of Petunia hybrida cell suspensions to ultrasound at a frequency of 2.43 MHz in a standing wave field at an energy density of 70 Jm-3 (pressure amplitude of 0.78 MPa) decreased their mean viability to 35% after 20 min of sonication. A comparison of propagating wave and standing wave treatments at equal freque...
journal_title：Ultrasonics
pub_type： 杂志文章
doi：10.1016/s0041-624x(99)00166-3
更新日期：2000-03-01 00:00:00
abstract：:The remote inspection for defects in large metallic elements such as pipes, tubes and plates is a field where guided waves are being applied with success. There are a number of situations where a surface coating is added for corrosion protection or insulation purposes. Since the coating materials are usually viscoelas...
journal_title：Ultrasonics
pub_type： 杂志文章
doi：10.1016/j.ultras.2004.01.072
更新日期：2004-04-01 00:00:00
abstract：:Focused ultrasound holds promise in a large number of therapeutic applications. It has long been known that high intensity focused ultrasound can kill tissue through coagulative necrosis. However, it is only in recent years that practical clinical applications are becoming possible, with the development of high power ...
journal_title：Ultrasonics
pub_type： 杂志文章
doi：10.1016/j.ultras.2004.04.003
更新日期：2004-08-01 00:00:00
abstract：:In this paper a high intensity focused ultrasound (FUS) phantom model was developed, in order to be used in experiments for Blood Brain Barrier (BBB) disruption. The target was to create a phantom model that represents the disruption of the BBB during ultrasound application. An appropriate experimental setup was creat...
journal_title：Ultrasonics
pub_type： 杂志文章
doi：10.1016/j.ultras.2020.106244
更新日期：2021-02-01 00:00:00
abstract：:In the food industry, ultrasonic cutting is used to improve separation by a reduction of the cutting force. This reduction can be attributed to the modification of tool-workpiece interactions at the cutting edge and along the tool flanks because of the superposition of the cutting movement with ultrasonic vibration of...
journal_title：Ultrasonics
pub_type： 杂志文章
doi：10.1016/j.ultras.2009.03.001
更新日期：2009-06-01 00:00:00
abstract：:This study aims to bridge the gap between transport mechanisms of an improved ultrasound contrast agent (UCA) and its resulting behavior in a clinical imaging study. Phospholipid-shelled microbubbles nested within the aqueous core of a polymer microcapsule are examined for their use and feasibility as an improved UCA....
journal_title：Ultrasonics
pub_type： 杂志文章
doi：10.1016/j.ultras.2014.06.019
更新日期：2014-12-01 00:00:00
abstract：:Skeletal muscle is an important secretory organ in mammals, producing myriad chemical mediators ("myokines") with distinct biological action in different tissues, including anti-inflammatory activity. Extracellular vesicles (EVs) have recently been identified as a mode of myokine transport from muscle, facilitating su...
journal_title：Ultrasonics
pub_type： 杂志文章
doi：10.1016/j.ultras.2020.106243
更新日期：2021-02-01 00:00:00
abstract：:The propagation of non-axisymmetric guided waves in larger diameter pipes is studied in this paper by treating the guided waves as corresponding Lamb waves in an unwrapped plate. This approximation leads to a simpler method for calculating the phase velocities of hollow cylinder guided waves, which reveals a beam focu...
journal_title：Ultrasonics
pub_type： 杂志文章
doi：10.1016/j.ultras.2005.07.002
更新日期：2006-01-01 00:00:00
abstract：:An ultrasonic technique for imaging nonlinear scatterers, such as partially-closed cracks, buried in a medium has been recently proposed. The method called fundamental wave amplitude difference (FAD) consists of a sequence of acquisitions with different subsets of elements for each line of the image. An image revealin...
journal_title：Ultrasonics
pub_type： 杂志文章
doi：10.1016/j.ultras.2019.02.003
更新日期：2019-07-01 00:00:00
abstract：:Mechanical properties of biological tissue represent important diagnostic information and are of histological and pathological relevance. In order to obtain non-invasively mechanical properties of tissue, we developed a real-time strain imaging system for clinical applications. The output data of this system also allo...
journal_title：Ultrasonics
pub_type： 杂志文章
doi：10.1016/j.ultras.2006.06.007
更新日期：2006-12-22 00:00:00
