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

Ternary and quadriphase sequence diffusers.

Trevor J Cox1, James A S Angus, Peter D'Antonio

  • 1Acoustics Research Centre, University of Salford, Salford M5 4WT, United Kingdom. t.j.cox@salford.ac.uk

The Journal of the Acoustical Society of America
|February 4, 2006
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

Introduction to the special issue on sound absorption and diffusion: Modeling, measurement, and applicationa).

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

Reverberation-chamber measurement of angle-dependent surface impedancea).

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

The Cadenza lyric intelligibility prediction (CLIP) dataset.

Data in brief·2026
Same author

The cadenza woodwind dataset: Synthesised quartets for music information retrieval and machine learning.

Data in brief·2024
Same author

<i>Muddy</i>, <i>muddled</i>, or <i>muffled</i>? Understanding the perception of audio quality in music by hearing aid users.

Frontiers in psychology·2024
Same author

Improving the measurement and acoustic performance of transparent face masks and shields.

The Journal of the Acoustical Society of America·2022
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

Ternary sequence diffusers offer improved sound scattering over traditional hybrid surfaces by using out-of-phase reflections. This acoustic diffuser technology enhances sound diffusion without increasing sound absorption.

Area of Science:

  • Acoustics
  • Materials Science
  • Wave Physics

Background:

  • Room acoustic diffusers manage reflected sound waves via spatially varying surface impedance.
  • Hybrid surfaces use patches of absorption (reflection coefficient 0) and reflection (coefficient 1).
  • Planar hybrid surfaces primarily reduce specular energy through absorption.

Purpose of the Study:

  • To introduce ternary sequence diffusers for enhanced sound diffusion.
  • To explore methods for generating and fabricating ternary sequence diffusers.
  • To evaluate the scattering performance of ternary diffusers compared to existing technologies.

Main Methods:

  • Developing diffusers based on ternary sequences with reflection coefficients of 0, -1, and +1.
  • Utilizing interference by reflecting waves out-of-phase to reduce specular energy.

Related Experiment Videos

  • Employing Fourier and boundary element method models for performance prediction.

    • Main Results:

    • Ternary sequence diffusers demonstrate improved scattering performance over unipolar binary diffusers across most frequencies.
    • Specular energy reduction is enhanced by exploiting destructive interference.
    • Performance limitations at specific frequencies were identified.

    Conclusions:

    • Ternary sequence diffusers provide superior sound diffusion without additional absorption.
    • Further improvements can be achieved using four-level, quadriphase sequences to overcome frequency-specific limitations.
    • This research offers a novel approach to acoustic diffuser design for better room acoustics.