Since measurement and analysis of acousticimpulse responses along arrays of microphone positions has proved to bethe optimal way to analyze, interpret and optimize the acousticproperties of halls and other environments, a logic next step is toapply the same approach to the analysis of bending wave fields in solidmaterials. A complication here is that bending waves are dispersive(high frequencies travel faster than low ones), causing the temporalresolution in the impulse responses to be very poor. A method toeliminate the dispersion from the data has been developed and is readyto be tested and optimized in practice. Application fields of thisarray-based analysis approach include building acoustics (soundinsulation), audio technology (performance of the increasingly popularflat-panel loudspeakers), non-destructive material testing and waveanalysis in the shallow subsurface (e.g., vibrations generated byhigh-speed trains). The successful applicant will focus on the firsttwo topics. After two years, a post-doc will join him/her to usehis/her results for application in the other fields. The research isfinanced by STW, a Dutch organization supporting promising work inapplied science. Funding has been granted for three years. Ifnecessary, funds for an additional forth year can be applied for.

Required education/skills:University Graduate
The successful candidate has his/her M.Sc degree in physics,electrotechnics or mathematics, and a strong background in signalprocessing. Affinity with the field of acoustics is an advantage. Agood command of the English language is required and well developedcommunicational and social skills are welcomed.

Job type(s):
- Teaching & Research

Additional information about the job:
Theresearch will be carried out at the Laboratory of Acoustical Imagingand Sound Control, one of the sections of the IST department. Here,under guidance of a full professor, two associate professors and anassistant professor, and supported by skilled technical and logisticsstaff, about 10 PhD students, 15 MSc students and 5 BSc students dotheir research. A major part of the research is sponsored by oilcompanies, unified in the DELPHI consortium. The thread throughout thisresearch program is the application of array technology. Arrays ofsources and/or detectors are used, in combination with dedicatedsoftware, to compile pictures of the earth bottom (seismicexploration), the human body (medical diagnostics) and constructions(non-destructive testing). Arrays of microphones are used to measuremulti-trace impulse responses in halls for acoustical analysis andoptimization, arrays of loudspeakers are used to generate sound fieldswith natural spatial properties in the entire listeners area (WaveField Synthesis, WFS). In the context of the present project, arrays ofexciters and detectors are applied to measure and analyze bending wavefields.

Delft University of Technology

Organisation:
The Faculty of AppliedSciences of the Delft University of Technology is the largest and mostscience-oriented faculty of the Delft University of Technology. Atpresent approximately 570 scientists (of which 160 have a permanent andsenior position) are involved in fundamental and application drivenresearch in the disciplines of physics, chemistry and biology. Atechnical and administrative staff of 380 people supports them. Strongcollaborative links are fostered with industry and other third leveleducation institutions both in The Netherlands and abroad. The facultyis responsible for the education of some 1025 graduate students(distributed over four Master programmes), 50 postgraduate students and230 PhD students. Furthermore 130 postdocs are working in the faculty.

Department:
Images are pervasive in modern life. From optical images of collidinggalaxies taken by the Hubble telescope to acoustic images ofunderground seismic structures to magnetic resonance images of thehuman body to atomic force images of atoms and molecules to the videoimages that surround us, the acquisition, processing, and analysis ofimages provides a wealth of intellectual, scientific and technicalchallenges.
The research program of the IST department, involving 29 permanentfaculty members, concerns itself with the development of new imageacquisition and processing systems as well as the quantitative analysisof the two-, three-, and four-dimensional images obtained through suchsystems. A variety of imaging modalities and a broad range ofapplication domains are represented in this program.

Estimated maximum salary per month: eur 2000 - 2500
Salaryscale 10.
Maximum salary amount in Euro's a month 2394
Employment basis: Temporary for specified period
Duration of the contract: 36 months
Maximum hours per week: 38

Additional conditions of employment:
Enrolment (which will start as soon as possible) and salary areaccording to the Employment Agreement Dutch Universities.The succesfulcandidate will be employed for a fixed period of 36 months, withpossible extension to 48 months; starting salary per month: EUR 2074,-( 4th year EUR 2394,- ).
He/she is expected to write a dissertation leading to the Dr. title (Ph.D thesis).

 
Or additional information can be obtained through one of the following links.

You can apply for this job before 30-06-2005 by sending your application to:

Faculty of Aplied Sciences
Dr. D. Diemer de Vries
Lorentzweg 1
2628 CJ Delft
the Netherlands
E-mail address: diemer@akst.tn.tudelft.nl

2005-06-30 00:00:00.0

Source: Academic Transfer