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Related Concept Videos

Perception of Sound Waves01:01

Perception of Sound Waves

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 frequency...
Echo01:06

Echo

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, then the...

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Related Experiment Video

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Long-term Behavioral Tracking of Freely Swimming Weakly Electric Fish
10:56

Long-term Behavioral Tracking of Freely Swimming Weakly Electric Fish

Published on: March 6, 2014

Rethinking sound detection by fishes.

Arthur N Popper1, Richard R Fay

  • 1Department of Biology and Center for Comparative and Evolutionary Biology of Hearing, University of Maryland, College Park, MD 20742, USA. apopper@umd.edu

Hearing Research
|December 26, 2009
PubMed
Summary
This summary is machine-generated.

The terms "hearing specialists" and "hearing generalists" in fish are vague and should be dropped. Most fish likely detect sound via particle motion, with specialized hearing linked to air-filled swim bladders.

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Area of Science:

  • Ichthyology
  • Bioacoustics
  • Auditory Neuroscience

Background:

  • The classification of fish hearing into
  • specialists
  • and
  • generalists
  • is widely used but lacks clear definition.
  • Existing terminology is inconsistently applied across studies and investigators.
  • This ambiguity hinders a precise understanding of auditory capabilities in fish.

Purpose of the Study:

  • To critically re-evaluate the current classification of fish hearing.
  • To propose a revised framework for understanding auditory sensitivity in fishes.
  • To advocate for the discontinuation of the
  • specialist
  • /
  • generalist
  • dichotomy.

Main Methods:

  • Literature review and synthesis of existing research on fish auditory systems.
  • Analysis of data on sound detection mechanisms in various fish species.
  • Comparative examination of morphological adaptations related to hearing.

Main Results:

  • The ancestral and most common mode of fish hearing relies on sensitivity to acoustic particle motion.
  • Sensitivity to sound pressure is typically mediated by an air bubble, such as the swim bladder.
  • Some fish exhibit frequency-dependent sensitivity to both pressure and motion, defying simple classification.

Conclusions:

  • The
  • hearing specialist
  • /
  • generalist
  • classification for fish is problematic and should be abandoned.
  • A more accurate approach focuses on the physical mechanisms of sound detection (particle motion vs. pressure).
  • The term
  • specialization
  • should be reserved for species with a direct otophysic connection enhancing sound pressure sensitivity.