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Related Concept Videos

Perception of Sound Waves01:01

Perception of Sound Waves

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The human ear is not equally sensitive to all frequencies in the audible range. It may perceive sound waves with the same pressure but different frequencies as having different loudness. Moreover, the perception of sound waves depends on the health of an individual's ears, which decays with age. The health of one's ears may also be affected by regular exposure to loud noises.
The pitch of a sound depends on the frequency and the pressure amplitude of the source. Two sounds of the same...
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Hearing01:31

Hearing

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When we hear a sound, our nervous system is detecting sound waves—pressure waves of mechanical energy traveling through a medium. The frequency of the wave is perceived as pitch, while the amplitude is perceived as loudness.
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Sound Intensity Level00:53

Sound Intensity Level

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Humans perceive sound by hearing. The human ear helps sound waves reach the brain, which then interprets the waves and creates the perception of hearing. The loudness of the environment in which a person is located determines whether they can distinguish between different sound sources.
The human ear can perceive an extensive range of sound intensity, necessitating the use of the logarithmic scale to define a physical quantity—the intensity level. It is a ratio of two intensities and...
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Physical Assessment of the Respiratory Tract IV: Auscultation01:28

Physical Assessment of the Respiratory Tract IV: Auscultation

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Auscultation is a crucial component of the physical assessment of the respiratory tract. It offers valuable insights into airflow through the bronchial tree and potential lung obstructions. This process involves careful listening to breath, voice, and adventitious sounds, which can reveal a wealth of information about a patient's respiratory health.
Breath Sounds
Breath sounds are categorized into vesicular, bronchovesicular, and bronchial.
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Perceiving Loudness, Pitch, and Location01:21

Perceiving Loudness, Pitch, and Location

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The human brain perceives pitch through two primary mechanisms reflected in place theory and frequency theory. Each mechanism describes how sound waves are interpreted as specific pitches by the brain, offering insights into the intricate processes of auditory perception.
Place theory, or place coding, suggests that different pitches are heard because various sound waves activate specific locations along the cochlea's basilar membrane. The brain determines the pitch of a sound by...
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Assessment of the Cardiovascular System IV: Auscultation01:25

Assessment of the Cardiovascular System IV: Auscultation

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Cardiac auscultation is a clinical skill used to assess heart function and detect abnormalities. It involves listening to heart sounds at specific anatomical locations through a stethoscope.
Normal Heart Sounds
S1 (First Heart Sound)-
S1 is made by the closure of the mitral and tricuspid valves (atrioventricular valves), marking the beginning of systole.
S2 (Second Heart Sound)-
S2 is made by the closure of the aortic and pulmonic valves (semilunar valves), marking the end of the systole.
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Updated: Oct 15, 2025

Neuro-rehabilitation Approach for Sudden Sensorineural Hearing Loss
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Neuro-rehabilitation Approach for Sudden Sensorineural Hearing Loss

Published on: January 25, 2016

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Do I have a hearing loss?

William A Yost1

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

The Journal of the Acoustical Society of America
|October 31, 2021
PubMed
Summary
This summary is machine-generated.

This series revisits impactful historical acoustics research from The Journal of the Acoustical Society of America. It highlights key contributions to the science and practice of acoustics.

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Area of Science:

  • Acoustics
  • Sound Science
  • Vibration Analysis

Background:

  • The Journal of the Acoustical Society of America (JASA) has a long history of publishing significant research.
  • Understanding the historical trajectory of acoustics is crucial for current scientific advancement.

Purpose of the Study:

  • To commemorate and analyze seminal articles in the field of acoustics.
  • To provide historical context for contemporary acoustic research and applications.

Main Methods:

  • Review and selection of historically significant articles from JASA.
  • Analysis of the impact of these articles on acoustic science and practice.

Main Results:

  • Identification of key papers that have shaped the field.
  • Demonstration of the evolution of acoustic theories and methodologies.

Conclusions:

  • Historical research in acoustics continues to inform and inspire current studies.
  • The Reflections series offers valuable insights into the foundational work of acoustics.