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Related Experiment Video

Updated: Mar 22, 2026

Three-dimensional Optical-resolution Photoacoustic Microscopy

Three-dimensional Optical-resolution Photoacoustic Microscopy

Published on: May 3, 2011

Fast wideband acoustical holography.

¹Brüel and Kjær Sound and Vibration Measurement A/S, Skodsborgvej 307, DK-2850 Nærum, Denmark.

The Journal of the Acoustical Society of America

|April 24, 2016

Summary

This summary is machine-generated.

A new wideband holography method overcomes frequency limitations of traditional acoustical holography and beamforming. This compressed sensing approach uses a single measurement for full-frequency acoustic imaging, offering improved efficiency and resolution.

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Area of Science:

Acoustics
Signal Processing
Computational Physics

Background:

Traditional near-field acoustical holography (NAH) and beamforming have frequency-dependent resolution limitations.
NAH excels at low frequencies, while beamforming is effective at medium-to-high frequencies.
Existing methods require conflicting measurement distances for optimal performance.

Purpose of the Study:

To develop a wideband holography method overcoming the frequency limitations of NAH and beamforming.
To enable accurate acoustic imaging across a broad frequency range with a single measurement setup.
To address the practical conflict in measurement distances required by NAH and beamforming.

Main Methods:

The developed method employs compressed sensing principles for sparse sound field representation.
It utilizes an irregular array for a single, short-distance measurement.
An iterative sparsity-promoting inverse problem solution is used instead of traditional regularization.

Main Results:

The wideband holography method provides a single result covering the full frequency range.
It overcomes the conflicting distance requirements of traditional NAH and beamforming.
The iterative solution is computationally efficient and yields comparable results to other methods.

Conclusions:

The new wideband holography method offers a practical solution for acoustic imaging across all frequencies.
Compressed sensing principles enable efficient and accurate sound field reconstruction.
This approach significantly enhances the versatility and applicability of near-field acoustical holography.