Acoustic Physics
Acoustic Physics - Related Videos
04:54
A Stable Phantom Material for Optical and Acoustic Imaging
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Cited by 9 •
2023
This protocol describes the fabrication of a stable, biologically relevant phantom material for optical and acoustic biomedical imaging applications, featuring independently tunable acoustic and optical properties.
12:26
Fabrication, Operation and Flow Visualization in Surface-acoustic-wave-driven Acoustic-counterflow Microfluidics
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Cited by 4 •
2013
In this video we first describe fabrication and operation procedures of a surface acoustic wave (SAW) acoustic counterflow device. We then demonstrate an experimental setup that allows for both qualitative flow visualization and quantitative analysis of complex flows within the SAW pumping device.
05:21
General Approach to the Physical Exam
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2023
Source: Jaideep S. Talwalkar, MD, Internal Medicine and Pediatrics, Yale School of Medicine, New Haven, CT The examination of the body is fundamental to the practice of medicine. Since the Roman Empire, physicians have described the connection between alterations in function of specific parts of the body and specific disease states and have sought to further scientific understanding to improve bedside diagnosis. However, in this modern age of increasing technology within medical diagnostics, it...
14:22
Activating Molecules, Ions, and Solid Particles with Acoustic Cavitation
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Cited by 6 •
2014
Acoustic cavitation in liquids submitted to power ultrasound creates transient extreme conditions inside the collapsing bubbles, which are the origin of unusual chemical reactivity and light emission, known as sonoluminescence. In the presence of noble gases, nonequilibrium plasma is formed. The "hot" particles and the photons generated by collapsing bubbles are able to excite species in solution.
08:45
Assessment of Physical Activity Intensity with Accelerometers and Oxygen Consumption
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2025
Here, we present a protocol to assess physical activity intensity levels measured with indirect calorimetry and two accelerometers (on the right wrist and waist) during an incremental walking-jogging test (from 0.84 to 2.37 m/s) on an oval track. The results show differences among the physical intensity assessed through those methods.
FAQs
Frequency and amplitude describe different aspects of the same acoustic event. Frequency determines perceived pitch, whereas amplitude influences intensity, so changing one does not simply produce the effect associated with the other. Examining both variables helps investigators characterize pressure variations and compare how sound behaves across gases, liquids, and solids.
Boundaries can redirect or reorganize acoustic energy through reflection, refraction, diffraction, or resonance. These interactions are not interchangeable: together they describe different ways sound responds when it encounters a boundary or surrounding structure. Studying them helps explain why rooms, instruments, and other physical systems produce different acoustic behaviors.
The medium provides the particles whose oscillation carries pressure variations, so sound behavior depends on whether transmission occurs through a gas, liquid, or solid. Comparing these settings allows researchers to study wave propagation and energy transfer alongside material properties, rather than treating sound as independent of its physical environment.
Researchers can examine how acoustic waves propagate through a material and how that material participates in energy transfer. Comparing transmission through gases, liquids, and solids helps reveal differences in material behavior. This analytical role connects the study of sound with nondestructive testing, where acoustic principles are applied to investigate materials.
A practical investigation can be organized around three stages: generate the sound, track its transmission through a chosen medium, and detect the resulting signal. Researchers can then consider pressure variations, frequency, amplitude, and boundary interactions to interpret propagation and energy transfer. This sequence applies across gases, liquids, and solids.
Architectural acoustics, noise control, and musical instrument design apply acoustic principles to designed sound environments and instruments. Medical ultrasound, sonar, and nondestructive testing show how the same principles support work in medical, detection, and material-focused settings. Together, these uses connect wave behavior with practical goals involving sound, systems, and materials.