Journal article
Hydrophones’ effective diameter measurements as a quasi-continuous function of frequency
Ultrasonics, v 41(8), pp 635-641
Nov 2003
PMID: 14585475
Featured in Collection : UN Sustainable Development Goals @ Drexel
Abstract
The spatial averaging effect is strongly dependent on the active aperture of the hydrophone probes used to measure ultrasound fields. An experimental method was developed to determine the effective diameter of the probes as a quasi-continuous function of frequency. The implementation of the method utilizes the time delay spectrometry (TDS) technique and a set of focused acoustic sources. The use of focused sources ensured plane wave conditions for the whole frequency range and TDS eliminated all the reflections from the water tank boundaries. This approach allows effective diameter of circular aperture hydrophones to be determined as a quasi-continuous function of frequency up to 40 MHz. The measurements were performed for both needles and membrane designs having nominal diameters ranging from 50 to 500 μm. The results were successfully employed in the development of spatial averaging correction algorithms. Current efforts are being focused on extension of the frequency range up to 60 MHz by using a novel measurement technique termed time gating frequency analysis.
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Details
- Title
- Hydrophones’ effective diameter measurements as a quasi-continuous function of frequency
- Creators
- E.G. Radulescu - Drexel UniversityP.A. Lewin (Corresponding Author) - Drexel UniversityA. Nowicki - Institute of Fundamental Technological ResearchW.A. Berger - University of Scranton
- Publication Details
- Ultrasonics, v 41(8), pp 635-641
- Publisher
- Elsevier
- Number of pages
- 7
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- School of Biomedical Engineering, Science, and Health Systems
- Web of Science ID
- WOS:000186795100005
- Scopus ID
- 2-s2.0-0142247356
- Other Identifier
- 991019167771104721
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InCites Highlights
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- Collaboration types
- Domestic collaboration
- International collaboration
- Web of Science research areas
- Acoustics
- Radiology, Nuclear Medicine & Medical Imaging