Acoustic holography
US8701491B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Apr 22, 2009 |
| Grant date | Apr 22, 2014 |
| Priority date | — |
| Expiry date | Oct 11, 2030 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01H3/125
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method of performing near-field acoustic holography comprises the following steps. Establishing (102) acoustic data representing a set of near-field acoustic holography measurements at a first set of positions. Extrapolating (204) acoustic data using a model-based extrapolation to obtain extrapolated acoustic data relating to a plurality of positions outside the aperture. Applying (108) a spatial frequency transform to the padded acoustic data to obtain data in a spatial frequency domain. Propagating (110) the Fourier transformed acoustic data. Applying (112) a regularization in a wavenumber domain. Performing (114) an inverse spatial frequency transform.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.