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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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Light rays enter the eye through the cornea, a transparent dome-shaped tissue that is the eye's outermost layer. The cornea bends or refracts, light rays traveling to the pupil. The shape of the cornea determines how much of the light is bent and whether the image will be focused correctly on the retina at the back of the eye. Once the light has passed through both refraction layers, it converges into a single focal point onto a small area. This is where photoreceptors start transforming...
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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.
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Ideally, the people who observe and record the children’s behavior are unaware of who was assigned to the experimental or control group, in order to control for experimenter bias. Experimenter bias refers to the possibility that a researcher’s expectations might skew the results of the study. Remember, conducting an experiment requires a lot of planning, and the people involved in the research project have a vested interest in supporting their hypotheses. If the observers knew which...
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Visual agnosia is a condition characterized by the inability to recognize visually presented objects despite having normal vision. For instance, a person with visual agnosia can describe the shape and color of an object but cannot identify or name it. This impairment does not affect their visual field, acuity, color vision, brightness discrimination, language, or memory. An example of this condition in a social setting is someone at a dinner party asking for "that silver thing with a round...
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Related Experiment Video

Updated: May 22, 2025

Development of an Audio-based Virtual Gaming Environment to Assist with Navigation Skills in the Blind
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I can't hear you without my glasses.

Tessa Bent1

  • 1Department of Speech, Language and Hearing Sciences, Indiana University, 2631 East Discovery Parkway, Bloomington, IN, 47408 USA.

The Journal of the Acoustical Society of America
|March 12, 2025
PubMed
Summary

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

Area of Science:

  • Acoustics
  • Sound Science
  • Vibrational Physics

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 provide a retrospective analysis of seminal articles in acoustics.
  • To identify and discuss papers that have shaped the field of acoustics.

Main Methods:

  • Review of historical publications in The Journal of the Acoustical Society of America.
  • Selection of articles based on their demonstrated impact on acoustic science and practice.

Main Results:

  • Identification of key research themes and breakthroughs in acoustics over time.

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  • Analysis of how specific articles influenced subsequent research and technological development.

    • Conclusions:

    • Historical acoustics research provides valuable insights for contemporary challenges.
    • The series aims to contextualize current acoustic research within its historical framework.