Acoustic Methods for Obtaining the Pressure Reflection Coefficient from a Buffer Rod Based Measurement Cell
TypeJournal article; Peer reviewed
MetadataShow full item record
The known acoustic methods for obtaining the pressure reflection coefficient from a buffer rod based measurement cell are presented, along with 2 new generic approaches for measuring the pressure reflection coefficient using 2 buffer rods enclosing the liquid to be characterized in a symmetrical arrangement. An acoustic transducer is connected to each of the buffer rods. The generic approaches are divided into a relative amplitude approach and a mixed amplitude approach. For the relative amplitude approach, families of 4, 5, or 6 echo signals can be used to obtain the pressure reflection coefficient. The mixed amplitude approach uses specific information about the transducers and/or the electronics sensitivities in receive mode to obtain the pressure reflection coefficient using families of 3, 4, 5, or 6 echo signals. Some of the new methods from the relative amplitude approach imply a reduced uncertainty relative to the previously known ABC method. The effect of the liquid attenuation, digitizer bit resolution, and the signal-to-noise ratio on the uncertainty characteristics of the pressure reflection coefficient are discussed, along with a discussion of the suitability of the various methods for different buffer materials.
CitationUltrasonics, Ferroelectrics and Frequency Control, IEEE Transactions on 2008 55 (8): 1781-1793
SubjectAcoustic measurementAcoustic transducersAcoustic wave reflectionBuffer layersEchoAcoustic methodsAcoustic transducersBuffer materialsBuffer rod based measurement cellEcho signalsPressure reflection coefficientSymmetrical arrangement
Showing items related by title, author, creator and subject.
Calise, Lucio (The University of Bergen, 2009-03-30)Although this thesis is a dissertation based on articles, an exhaustive overview on the main issues involved is also presented *. This is due to the necessity to summarize the numerous aspects of the problem, as well as ...Doctoral thesis
Catch-and-release of Atlantic cod (Gadus morhua): post-release behaviour of acoustically pretagged fish in a natural marine environment Ferter, Keno; Klaas, Hartmann; Kleiven, Alf Ring; Moland, Even; Olsen, Esben Moland (NRC Research Press, 2014-10-07)Studying the sublethal effects of catch-and-release (C&R) is challenging, as there are several potential sources of bias. For example, if behavioural alterations immediately after the release event are to be studied, ...Journal article
Zooplankton abundance and distribution around on a seamount in the Andaman Sea, Thailand, measured with acoustic methods and biological sampling Jithlang, Issarapon (The University of Bergen, 2011-08-30)Studies of abundance and distribution of zooplankton with acoustic instruments is new methodology in Thailand. In order to evaluate if the zooplankton could be detected and measured, a specific area around a seamount in ...Master thesis