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Applied Sciences
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Holography in Acoustics and Ultrasonics
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Holography in Acoustics and Ultrasonics

A special issue of Applied Sciences (ISSN 2076-3417). This special issue belongs to the section "Acoustics and Vibrations".

Deadline for manuscript submissions: closed (20 August 2021) | Viewed by 14054

Special Issue Editors

Prof. Dr. Francisco Camarena

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Guest Editor
Instituto de Instrumentación para Imagen Molecular (i3M), Universitat Politècnica de València (UPV), Consejo Superior de Investigaciones Científicas (CSIC), 46022 València, Spain
Interests: ultrasound; piezoelectrocity; HIFU; acoustic simulation; photoacoustic
Dr. Noé Jiménez

E-Mail Website
Guest Editor
Instituto de Instrumentación para Imagen Molecular (i3M), Universitat Politècnica de València (UPV), Consejo Superior de Investigaciones Científicas (CSIC), 46022 València, Spain
Interests: acoustics; ultrasonics; metamaterials; biomedical ultrasound; nonlinear acoustics
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Acoustic holography captures three-dimensional wavefield information in a two-dimensional surface, enabling applications that range from accurate source characterization to advanced ultrasound beamforming. Holography was discovered by the Novel laureate Denis Gabor in the 1950s, but only in recent years has its full potential been revealed in acoustics and ultrasonics. In this Special Issue, we call for papers that present recent advances in acoustic holography using acoustic and elastic waves, including from acoustic holograms for beamforming using lenses and metamaterials, haptic devices and particle trapping, to acoustic holographic methods for source characterization and identification.

Prof. Dr. Francisco Camarena
Dr. Noé Jiménez
Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Applied Sciences is an international peer-reviewed open access semimonthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2400 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • acoustic holography
  • acoustic holograms
  • near-field acoustic holography

Published Papers (2 papers)

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Research

13 pages, 6213 KiB  
Article
Generating Airborne Ultrasonic Amplitude Patterns Using an Open Hardware Phased Array
by Rafael Morales, Iñigo Ezcurdia, Josu Irisarri, Marco A. B. Andrade and Asier Marzo
Appl. Sci. 2021, 11(7), 2981; https://0-doi-org.brum.beds.ac.uk/10.3390/app11072981 - 26 Mar 2021
Cited by 21 | Viewed by 11724
Abstract
Holographic methods from optics can be adapted to acoustics for enabling novel applications in particle manipulation or patterning by generating dynamic custom-tailored acoustic fields. Here, we present three contributions towards making the field of acoustic holography more widespread. Firstly, we introduce an iterative [...] Read more.
Holographic methods from optics can be adapted to acoustics for enabling novel applications in particle manipulation or patterning by generating dynamic custom-tailored acoustic fields. Here, we present three contributions towards making the field of acoustic holography more widespread. Firstly, we introduce an iterative algorithm that accurately calculates the amplitudes and phases of an array of ultrasound emitters in order to create a target amplitude field in mid-air. Secondly, we use the algorithm to analyse the impact of spatial, amplitude and phase emission resolution on the resulting acoustic field, thus providing engineering insights towards array design. For example, we show an onset of diminishing returns for smaller than a quarter-wavelength sized emitters and a phase and amplitude resolution of eight and four divisions per period, respectively. Lastly, we present a hardware platform for the generation of acoustic holograms. The array is integrated in a single board composed of 256 emitters operating at 40 kHz. We hope that the results and procedures described within this paper enable researchers to build their own ultrasonic arrays and explore novel applications of ultrasonic holograms. Full article
(This article belongs to the Special Issue Holography in Acoustics and Ultrasonics)
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17 pages, 31796 KiB  
Article
Flaw Detection on a Tilted Particleboard by Use of the Spec-Radiation Method
by Andreas Sebastian Schmelt and Jens Twiefel
Appl. Sci. 2020, 10(23), 8513; https://0-doi-org.brum.beds.ac.uk/10.3390/app10238513 - 28 Nov 2020
Cited by 1 | Viewed by 1415
Abstract
Herein, we present a novel approach to the spec-radiation method (a method of acoustical holography) for determining the sound distribution on a tilted particleboard by calculating a single plane and rotation in the frequency domain. The tilted particleboard allows testing without standing waves [...] Read more.
Herein, we present a novel approach to the spec-radiation method (a method of acoustical holography) for determining the sound distribution on a tilted particleboard by calculating a single plane and rotation in the frequency domain. The tilted particleboard allows testing without standing waves between the transmitter and the particleboard. This eliminates the need to evaluate several parallel planes and to search for values belonging to the tilted particleboard. The numerical requirements can be optimally exploited through a combination with a flaw detectability enhancement method. The results are supported by experiments on a wooden particleboard with flaw imitations. Finally, we showed, through a comparison with the usual procedure of identifying a flaw (calculating many parallel planes and then selecting the data belonging to the tilted plane), that the calculation of the tilted plane is up to 98.5% faster and improves the detectability of flaws in a tilted particleboard. Full article
(This article belongs to the Special Issue Holography in Acoustics and Ultrasonics)
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