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Related Concept Videos

Shock Waves01:16

Shock Waves

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While deriving the Doppler formula for the observed frequency of a sound wave, it is assumed that the speed of sound in the medium is greater than the source's speed through it. When this condition is breached, a shock wave occurs.
When the source's speed approaches the speed of sound, constructive interference between successive wavefronts emitted by the source occurs immediately behind it. Initially, scientists believed that this constructive interference would result in such high...
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Sound Intensity00:58

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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...
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Heart Sounds01:15

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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.
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Sound Waves: Interference00:53

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Sound waves can be modeled either as longitudinal waves, wherein the molecules of the medium oscillate around an equilibrium position, or as pressure waves. When two identical waves from the same source superimpose on each other, the combination of two crests or two troughs results in amplitude reinforcement known as constructive interference. If two identical waves, that are initially in phase, become out of phase because of different path lengths, the combination of crests with troughs...
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Ultrasonography01:17

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Ultrasonography is an imaging technique that uses high-frequency sound waves to visualize the body's internal structures. It is a non-invasive and safe procedure that does not involve the use of ionizing radiation, making it widely used in various medical fields. Ultrasonography is used to study heart function, blood flow in the neck or extremities, certain conditions such as gallbladder disease, and fetal growth and development.
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Sound Waves01:01

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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.
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Author Spotlight: Development of a Laser-Induced Shock Wave Animal Model Without Tympanic Membrane Perforation
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[Acoustic shock disorder].

M F Diao1, J J Sun1

  • 1Center of Otorhinolaryngology of People's Liberation Army, Navy General Hospital, Beijing 100048, China.

Zhonghua Er Bi Yan Hou Tou Jing Wai Ke Za Zhi = Chinese Journal of Otorhinolaryngology Head and Neck Surgery
|April 21, 2016
PubMed
Summary
This summary is machine-generated.

Acoustic shock disorder (ASD) involves involuntary reactions to loud sounds, causing neurophysiological and psychological symptoms. This review covers ASD symptoms, mechanisms, and diagnostic approaches.

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Area of Science:

  • Audiology
  • Neuroscience
  • Psychology

Background:

  • Acoustic shock disorder (ASD) is an involuntary physiological and psychological response to sudden, intense auditory stimuli.
  • The condition can manifest with temporary or persistent symptoms impacting an individual's well-being.

Purpose of the Study:

  • To comprehensively review the diverse symptoms associated with acoustic shock disorder.
  • To explore the probable underlying mechanisms contributing to ASD.
  • To outline current evaluation and diagnostic methodologies for ASD.

Main Methods:

  • Literature review of existing studies on acoustic shock disorder.
  • Synthesis of information regarding symptoms, pathophysiology, and diagnostic criteria.

Main Results:

  • ASD presents with a range of neurophysiological (e.g., tinnitus, hyperacusis) and psychological (e.g., anxiety, distress) symptoms.
  • Potential mechanisms involve over-activation of the auditory and autonomic nervous systems.
  • Diagnosis relies on symptom presentation, patient history, and exclusion of other auditory conditions.

Conclusions:

  • Acoustic shock disorder is a complex condition requiring a multidisciplinary understanding.
  • Further research into the precise mechanisms and standardized diagnostic tools is warranted.
  • Effective management strategies should address both the auditory and psychological components of ASD.