Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Experiment Videos

Optimal focusing by spatio-temporal inverse filter. I. Basic principles.

M Tanter1, J F Aubry, J Gerber

  • 1Laboratoire Ondes et Acoustique, ESPCI, Université Paris VII, URA, CNRS 1503, France.

The Journal of the Acoustical Society of America
|August 18, 2001
PubMed
Summary
This summary is machine-generated.

Related Concept Videos

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

Impact of Phase Unwrapping on Multitarget Acoustic Lenses for Transcranial Holography.

IEEE transactions on ultrasonics, ferroelectrics, and frequency control·2025
Same author

The role of peripheral vision during decision-making in dynamic viewing sequences.

Journal of sports sciences·2024
Same author

Total and dissolved phosphorus losses from agricultural headwater streams during extreme runoff events.

The Science of the total environment·2022
Same author

Novel predictors related to hysteresis and baseflow improve predictions of watershed nutrient loads: An example from Ontario's lower Great Lakes basin.

The Science of the total environment·2022
Same author

Direct radiation exposure of the eye lenses in cranial computed tomography and exposure reduction through radiographer training.

Radiography (London, England : 1995)·2022
Same author

Evidence of free tropospheric and long-range transport of microplastic at Pic du Midi Observatory.

Nature communications·2021
Same journal

High-resolution depth estimation for multiple wideband sources in deep sea via sparse Bayesian learninga).

The Journal of the Acoustical Society of America·2026
Same journal

Depression markers in speech: An approach based on tract variables dynamics.

The Journal of the Acoustical Society of America·2026
Same journal

The oyster toadfish (Opsanus tau) alters active and diurnal calling amid vessel noise in New York City.

The Journal of the Acoustical Society of America·2026
Same journal

Experimental noise characterisation of phase-locked tandem-rotor in edgewise flight.

The Journal of the Acoustical Society of America·2026
Same journal

The tune-text-temporal synergy: Prosodic effects of final segmental weakening in Neapolitan.

The Journal of the Acoustical Society of America·2026
Same journal

Monitoring vessel movement above critical offshore infrastructure using distributed acoustic sensing.

The Journal of the Acoustical Society of America·2026
See all related articles

This study introduces a time-domain inverse-focusing technique for ultrasonic arrays. This method optimizes signal focusing in complex media, showing significant improvements over traditional methods for applications like medical imaging.

Area of Science:

  • Acoustics
  • Wave Propagation
  • Signal Processing

Background:

  • Previous work established a spatial focusing technique using propagation operator inversion.
  • Extending this to the time domain enables spatio-temporal focusing.
  • This technique is crucial for advanced ultrasonic applications.

Purpose of the Study:

  • To extend a focusing technique based on propagation operator inversion to the time domain.
  • To calculate temporal signals for optimal focusing on a control point.
  • To compare this broadband inverse-focusing technique with classical and time-reversal focusing.

Main Methods:

  • Inversion of the propagation operator in both space and time.
  • Utilizing singular-value decomposition in the Fourier domain for broadband inversion.

Related Experiment Videos

  • Comparison of inverse-focusing, geometrical focusing, and time-reversal focusing in homogeneous media.

    • Main Results:

    • The spatio-temporal inverse-filter technique demonstrates strong improvement in complex media.
    • Slight differences were observed between the three focusing strategies even in homogeneous media.
    • The number of degrees of freedom for acoustic fields in limited apertures and focal planes was defined.

    Conclusions:

    • The spatio-temporal inverse-filter technique offers significant potential for multiple-channel ultrasonic systems.
    • This method shows great promise for applications in medical imaging, nondestructive testing, and underwater acoustics.
    • The ability to apply distinct signal waveforms to each transducer enhances focusing capabilities.