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 Concept Videos

Azimuths and Bearings01:19

Azimuths and Bearings

616
Azimuths and bearings are essential concepts in surveying, providing methods to express the direction of a line relative to a meridian. Azimuths refer to the clockwise angle measured from the north end of a reference meridian to the given line, ranging from zero to 360 degrees. This method gives a comprehensive directional reference within a full 360-degree circle, making it a straightforward way to communicate direction in various fields, including navigation, cartography, and...
616
Soundness of Cement01:17

Soundness of Cement

543
The soundness of cement refers to the ability of cement paste to retain its volume after setting. Unsound cement can lead to expansion and structural damage due to the presence of free lime, magnesia, and calcium sulfate. Free lime hydrates very slowly, expanding and causing unsoundness, which is difficult to detect because it intercrystallizes with other compounds. Magnesia also reacts with water, forming crystals that can disrupt the cement's structure. Calcium sulfate can create...
543
Heart Sounds01:15

Heart Sounds

3.3K
Heart sounds are generated by the turbulence in blood flow due to the closing of heart valves. These sounds are best perceived slightly away from the valves, where the blood flow disseminates the sound.
Auscultation is the process of listening to these internal body sounds using a stethoscope. The heart produces four types of sounds, but only two—S1 and S2—can usually be heard with a stethoscope.
S1, also known as the "lub" sound, is caused by the closure of atrioventricular (A-V)...
3.3K
Korotkoff Sounds01:12

Korotkoff Sounds

7.7K
Korotkoff sounds are the specific sounds heard while measuring blood pressure using a sphygmomanometer, typically with a stethoscope or a Doppler device. They are named after Russian physician Nikolai Korotkov, who first described them in 1905. These sounds correspond to turbulent blood flow in the artery as the blood pressure cuff is gradually released after inflation.
During blood pressure assessment, inflating the cuff 30 millimeters of mercury above the patient's systolic blood pressure...
7.7K
Sound Waves01:01

Sound Waves

12.5K
Sound waves can be thought of as fluctuations in the pressure of a medium through which they propagate. Since the pressure also makes the medium's particles vibrate along its direction of motion, the waves can be modeled as the displacement of the medium's particles from their mean position.
Sound waves are longitudinal in most fluids because fluids cannot sustain any lateral pressure. In solids, however, shear forces help in propagating the disturbance in the lateral direction as well....
12.5K
Sound Intensity00:58

Sound Intensity

4.7K
The loudness of a sound source is related to how energetically the source is vibrating, consequently making the molecules of the propagation medium vibrate. To measure the loudness of a source, the physical quantity of interest is the intensity. This is defined as the energy emitted per unit of time per unit of area perpendicular to the sound wave's propagation direction. Since the total energy is greater if the source vibrates for a longer duration and over a larger area, dividing the...
4.7K

You might also read

Related Articles

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

Sort by
Same author

Differential effects of obesity on perioperative outcomes in renal cell carcinoma patients based on race and ethnicity and neighborhood-level socioeconomic status.

Translational andrology and urology·2024
Same author

Spatial Hearing in Children With and Without Hearing Loss: Where and What the Speech Is Matters for Local Speech Intelligibility.

American journal of audiology·2024
Same author

Synchronizing Automatic Gain Control in Bilateral Cochlear Implants Mitigates Dynamic Localization Deficits Introduced by Independent Bilateral Compression.

Ear and hearing·2024
Same author

Cones-of-Confusions: Are listeners confused? (L).

The Journal of the Acoustical Society of America·2023
Same author

Randomizing spectral cues used to resolve front-back reversals in sound-source localization.

The Journal of the Acoustical Society of America·2023
Same author

Molecular analysis of individual differences in talker search at the cocktail-party.

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

Related Experiment Video

Updated: Jan 21, 2026

Sound Source Localization Testing in Single-sided Deafness Following Bone Conduction Intervention
04:32

Sound Source Localization Testing in Single-sided Deafness Following Bone Conduction Intervention

Published on: December 20, 2024

834

Sound-source localization as a multisystem process: The Wallach azimuth illusion.

William A Yost1, M Torben Pastore1, Kathryn R Pulling1

  • 1Spatial Hearing Laboratory, College of Health Solutions, Arizona State University, P.O. Box 870102, Tempe, Arizona 85287, USA.

The Journal of the Acoustical Society of America
|August 3, 2019
PubMed
Summary
This summary is machine-generated.

The Wallach Azimuth Illusion (WAI) causes listeners to perceive a stationary sound source during complex rotations. This study confirms WAI

More Related Videos

The Crossmodal Congruency Task as a Means to Obtain an Objective Behavioral Measure in the Rubber Hand Illusion Paradigm
06:43

The Crossmodal Congruency Task as a Means to Obtain an Objective Behavioral Measure in the Rubber Hand Illusion Paradigm

Published on: July 26, 2013

16.6K
Creating Virtual-hand and Virtual-face Illusions to Investigate Self-representation
06:53

Creating Virtual-hand and Virtual-face Illusions to Investigate Self-representation

Published on: March 1, 2017

13.8K

Related Experiment Videos

Last Updated: Jan 21, 2026

Sound Source Localization Testing in Single-sided Deafness Following Bone Conduction Intervention
04:32

Sound Source Localization Testing in Single-sided Deafness Following Bone Conduction Intervention

Published on: December 20, 2024

834
The Crossmodal Congruency Task as a Means to Obtain an Objective Behavioral Measure in the Rubber Hand Illusion Paradigm
06:43

The Crossmodal Congruency Task as a Means to Obtain an Objective Behavioral Measure in the Rubber Hand Illusion Paradigm

Published on: July 26, 2013

16.6K
Creating Virtual-hand and Virtual-face Illusions to Investigate Self-representation
06:53

Creating Virtual-hand and Virtual-face Illusions to Investigate Self-representation

Published on: March 1, 2017

13.8K

Area of Science:

  • Auditory perception
  • Psychoacoustics
  • Human spatial orientation

Background:

  • The Wallach Azimuth Illusion (WAI) describes a perceptual phenomenon where a sound source appears stationary despite actual rotation.
  • This illusion challenges traditional models of sound-source localization, suggesting a multisystem process involving binaural and head-position cues.

Purpose of the Study:

  • To investigate the Wallach Azimuth Illusion (WAI) under novel conditions of extended rotation.
  • To explore the relationship between the WAI, front-back reversals (FBRs), and sound-source localization.
  • To further understand sound-source localization as a multisystem process.

Main Methods:

  • Listeners and sound sources were subjected to prolonged rotations over large distances.
  • Measurements of predicted WAI locations and front-back reversals (FBRs) were correlated.
  • Listener-dependent perception was assessed under conditions with open eyes and minimal vestibular influence.

Main Results:

  • A strong correlation was found between predicted WAI locations and front-back reversals (FBRs).
  • When FBRs were unlikely, sound sources were perceived veridically, but this perception varied between listeners.
  • The WAI occurred robustly, independent of significant vestibular changes.

Conclusions:

  • The Wallach Azimuth Illusion (WAI) is a robust perceptual phenomenon.
  • The WAI is strongly linked to front-back sound reversals, supporting multisystem models of sound localization.
  • Individual listener differences play a role in the manifestation of the WAI.