Determination of the acoustic pressure at and the reflection coefficient of a target through measurements of the absorbed power and the emitter voltage

A harmonic acoustic wave, fed back by a reflecting target, modifies the electric impedance of the emitter. This effect is studied using a tightly focused beam and various flat targets with known reflection coefficients, which are placed at pressure maxima or minima of the standing wave in the focal...

Ausführliche Beschreibung

Gespeichert in:

Bibliographische Detailangaben
Veröffentlicht in:	IEEE transactions on ultrasonics, ferroelectrics, and frequency control ferroelectrics, and frequency control, 2004-01, Vol.51 (1), p.109-113
Hauptverfasser:	Mestas, J.-L.A., Lenz, P., Cathignol, D.
Format:	Artikel
Sprache:	eng
Schlagworte:	Acoustic absorption Acoustic beams Acoustic emission Acoustic impedance Acoustic measurements Acoustic reflection Acoustic waves Acoustical measurements and instrumentation Acoustics Acoustics - instrumentation Algorithms Electric Impedance Electric potential Electric power generation Emittance Energy Transfer Equipment Design Equipment Failure Analysis Exact sciences and technology Fundamental areas of phenomenology (including applications) Image Interpretation, Computer-Assisted - instrumentation Image Interpretation, Computer-Assisted - methods Impedance Models, Biological Optical reflection Phantoms, Imaging Physics Power measurement Pressure measurement Reflection coefficient Reproducibility of Results Scattering, Radiation Sensitivity and Specificity Transducers Transducers, Pressure Ultrasonography - instrumentation Ultrasonography - methods Voltage
Online-Zugang:	Volltext bestellen
Tags:	Tag hinzufügen Keine Tags, Fügen Sie den ersten Tag hinzu!

Beschreibung
Zusammenfassung:	A harmonic acoustic wave, fed back by a reflecting target, modifies the electric impedance of the emitter. This effect is studied using a tightly focused beam and various flat targets with known reflection coefficients, which are placed at pressure maxima or minima of the standing wave in the focal zone. It is possible to establish relationships that allow one to determine, for flat targets with unknown acoustic properties, the acoustic impedance and reflection coefficient of the target as well as the acoustic pressure present at the target, only from measurements of the absorbed power and the emitter voltage.
ISSN:	0885-3010 1525-8955
DOI:	10.1109/TUFFC.2004.1268472