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Related Concept Videos

Echo01:06

Echo

548
The human ear cannot distinguish between two sources of sound if they happen to reach within a specific time interval, typically 0.1 seconds apart. More than this, and they are perceived as separate sources.
Imagine the sound is reflected back to the ears. Assuming that the source is very close to the human, the difference between hearing the two sounds—the emitted sound and the reflected sound—may be more than the minimum time for perceiving distinct sounds. If this is the case,...
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The Cochlea01:13

The Cochlea

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The cochlea is a coiled structure in the inner ear that contains hair cells—the sensory receptors of the auditory system. Sound waves are transmitted to the cochlea by small bones attached to the eardrum called the ossicles, which vibrate the oval window that leads to the inner ear. This causes fluid in the chambers of the cochlea to move, vibrating the basilar membrane.
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Convergent Evolution01:54

Convergent Evolution

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Evolution shapes the features of organisms over time, ensuring that they are suited for the environments in which they live. Sometimes, selection pressure leads to the rise of similar but unrelated adaptations in organisms with no recent common ancestors, a process known as convergent evolution.
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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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Anatomy of the Ear01:16

Anatomy of the Ear

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Auditory sensation, commonly called hearing, involves the transformation of sonic waves into neural impulses facilitated by the structures of the auditory organ. The prominent, flesh-like structure on the side of the head, called the auricle, directs sound waves towards the auditory canal. The auricle is often mislabeled as the pinna, a term more aligned with mobile structures like a feline's external ear. The auditory canal penetrates the cranium via the external auditory meatus of the...
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Hair Cells01:22

Hair Cells

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Hair cells are the sensory receptors of the auditory system—they transduce mechanical sound waves into electrical energy that the nervous system can understand. Hair cells are located in the organ of Corti within the cochlea of the inner ear, between the basilar and tectorial membranes. The actual sensory receptors are called inner hair cells. The outer hair cells serve other functions, such as sound amplification in the cochlea, and are not discussed in detail here.
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Correction to: Modulation rate transfer functions from four species of stranded odontocete (Stenella longirostris, Feresa attenuata, Globicephala melas, and Mesoplodon densirostris).

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High Frequency hearing in echolocating dolphins.

Paul E Nachtigall1

  • 1University of Hawaii at Manoa, Marine Mammal Research Program, Hawaii Institute of Marine Biology, 46-007 Lilipuna Rd, Kaneohe, Hawaii 96744, USA.

The Journal of the Acoustical Society of America
|March 31, 2023
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Summary
This summary is machine-generated.

This series revisits impactful historical articles 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
  • Vibrational Physics

Background:

  • Historical review of foundational acoustics research.
  • Examining seminal works in the field of acoustics.

Purpose of the Study:

  • To analyze the long-term impact of specific articles.
  • To provide historical context for modern acoustics.

Main Methods:

  • Literature review of The Journal of the Acoustical Society of America.
  • Selection of articles based on citation impact and influence.

Main Results:

  • Identification of key papers shaping acoustic science.
  • Demonstration of the evolution of acoustic principles.

Conclusions:

  • These historical articles remain relevant to contemporary acoustics.
  • Understanding past research is crucial for future advancements.