Online Sound Processing
Online Sound Processing - Related Videos
09:44
Methods to Test Visual Attention Online
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Cited by 26 •
2015
To replicate laboratory settings, online data collection methods for visual tasks require tight control over stimulus presentation. We outline methods for the use of a web application to collect performance data on two tests of visual attention.
09:12
Sound Waves and Doppler Shift
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2023
Source: Arianna Brown, Asantha Cooray, PhD, Department of Physics & Astronomy, School of Physical Sciences, University of California, Irvine, CA Waves are disturbances that propagate through a material medium or empty space. Light waves can travel through a vacuum and some forms of matter, and are transverse in nature, which means that the oscillations are perpendicular to the direction of propagation. However, sound waves are pressure waves that travel through an elastic medium like air,...
10:51
Cardiac Exam III: Abnormal Heart Sounds
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2023
Source: Suneel Dhand, MD, Attending Physician, Internal Medicine, Beth Israel Deaconess Medical Center Having a fundamental understanding of normal heart sounds is the first step toward distinguishing the normal from the abnormal. Murmurs are sounds that represent turbulent and abnormal blood flow across a heart valve. They are caused either by stenosis (valve area too narrow) or regurgitation (backflow of blood across the valve) and are commonly heard as a "swishing" sound during auscultation.
01:15
Heart Sounds
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2025
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) valves at the...
01:12
Korotkoff Sounds
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2025
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...
FAQs
Online sound processing depends on tracking several properties at once, including frequency, intensity, timing, and spatial cues. Their changes provide information about how sounds evolve and where they occur. Auditory circuits organize these patterns as input continues, helping perception remain responsive to shifting speech, competing sounds, and other complex auditory events.
Precise timing allows neural systems to follow acoustic events as they unfold rather than treating them as isolated signals. This temporal organization supports the interpretation of speech and other changing sounds. When auditory timing is disrupted, communication and sensory functions may be affected, making timing a central focus of neuroscience research.
The nervous system uses ongoing changes in acoustic features to organize complex auditory scenes and distinguish potentially relevant input from competing sounds. Tracking frequency, intensity, timing, and spatial information provides multiple cues for this selection. Studying these operations helps explain how attention contributes to perception when several sounds occur together.
Researchers examine how acoustic information is transformed into neural signals and how auditory circuits track its changing features. Experimental methods can investigate perception during speech, localization, attention, or complex auditory scenes, while computational models represent the processing of incoming sound over time. Together, these approaches connect measurable acoustic patterns with neural and perceptual outcomes.
Following acoustic information as it changes can show how the nervous system maintains access to speech during ongoing input. Research in this area examines the timing and organization of auditory signals that support comprehension, especially when speech occurs within a complex auditory scene. These findings help connect neural processing with successful communication.
Spatial cues help auditory circuits organize information about where sounds occur, while attention influences which parts of an auditory scene receive priority. Examining both processes together shows how perception remains useful when multiple inputs compete. This neuroscience framework links real-time acoustic analysis with localization, selective listening, and interpretation of complex environments.
Investigating disrupted auditory timing and the organization of changing sound can identify processing differences relevant to communication and sensory disorders. Such work does not focus only on whether a sound is detected; it also considers how accurately its features are tracked and interpreted over time. The results can clarify links between neural dynamics and impaired auditory function.