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Related Concept Videos

Sound Intensity Level00:53

Sound Intensity Level

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 hence a...
Hearing01:31

Hearing

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.
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...
Sound Waves: Interference00:53

Sound Waves: Interference

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...
Barriers to Effective Communication I01:30

Barriers to Effective Communication I

A communication barrier is any distortion or interruption during a conversation, resulting in miscommunication of the message. A good communicator should know these barriers and continuously check for the listener's understanding by obtaining feedback.
Communication barriers include the following:
Physiological barriers: They are limitations caused by a person's health condition or disability, such as hearing loss, poor eyesight, illness, or unconsciousness. An example to overcome this barrier...

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Correction: Mimra et al. Functional Near-Infrared Spectroscopy (fNIRS) in Objective Audiometry: A Scoping Review and Clinical Perspectives. <i>Audiol. Res.</i> 2026, <i>16</i>, 3.

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Related Experiment Video

Updated: May 28, 2026

Modified Experimental Conditions for Noise-Induced Hearing Loss in Mice and Assessment of Hearing Function and Outer Hair Cell Damage
07:13

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Published on: February 10, 2023

Potential Risk for Hearing from Prolonged Exposure to Sound at Conversation Levels.

Wenyue Xue1, Nolan Sun1, Emily Wood1

  • 1Department of Physiology and Pharmacology, Hotchkiss Brain Institute, Cumming School of Medicine, University of Calgary, Calgary, AB T2N 4N1, Canada.

Audiology Research
|May 27, 2026
PubMed
Summary
This summary is machine-generated.

Even everyday conversation levels of sound can temporarily harm hearing. Continuous exposure to 65 dB sound pressure level (SPL) impaired auditory brainstem responses (ABRs) in mice, suggesting potential risks from sustained low-level noise.

Keywords:
ABRhearing healthhidden hearing losslow-level noise

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Area of Science:

  • Neuroscience
  • Auditory Science
  • Toxicology

Background:

  • Moderate to loud noise impairs hearing, but low-level sound safety is unknown.
  • Everyday conversation averages 65 dB SPL.
  • The impact of sustained 65 dB SPL exposure on auditory processing needs investigation.

Purpose of the Study:

  • To determine the effect of continuous 65 dB SPL sound exposure on auditory processing.
  • To analyze changes in auditory brainstem responses (ABRs) following sound exposure.

Main Methods:

  • Auditory brainstem responses (ABRs) were recorded in C57BL/6 mice.
  • Mice were exposed to a continuous 65 dB SPL pure tone for 1 hour.
  • Changes in ABR thresholds, wave amplitudes, and latencies were analyzed.

Main Results:

  • A frequency-specific increase in ABR thresholds (up to 15 dB) was observed.
  • Waves I-III showed reduced amplitudes and prolonged latencies; Wave V was stable.
  • Functional changes persisted for up to 3 hours post-exposure.

Conclusions:

  • Sustained exposure to conversational sound levels can transiently impair auditory function.
  • Early neural processing in the auditory pathway is altered by low-level sound.
  • Findings suggest potential risks from sustained sound exposure and inform diagnostic approaches for hidden hearing loss.