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High-powered automobile stereos

K L Ramsey1, F B Simmons

  • 1Division of Otolaryngology-Head and Neck Surgery, Stanford University Medical Center, CA 94305-5328.

Otolaryngology--Head and Neck Surgery : Official Journal of American Academy of Otolaryngology-Head and Neck Surgery
|July 1, 1993
PubMed
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Automobile stereo systems can produce high sound levels, posing a hearing damage risk. However, typical listening durations may reduce this risk for most users to acceptable levels.

Area of Science:

  • Audiology
  • Environmental Health
  • Acoustics

Background:

  • Automobile stereo systems are increasingly powerful.
  • High-intensity sound exposure is a concern for hearing health.

Purpose of the Study:

  • To measure the acoustic output of automobile stereo systems.
  • To assess the potential hearing damage risk based on sound levels and owner-reported exposure durations.

Main Methods:

  • Measured owner-adjusted acoustic outputs of 10 automobile stereo systems (150-600 watts).
  • Recorded sound levels in dB SPL and dBA.
  • Analyzed sound intensity in octave bands (31, 62, 125 Hz).
  • Calculated noise dose based on owner-reported daily exposure duration.

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Main Results:

  • Sound levels ranged from 107-138 dB SPL and 84-108 dBA.
  • High-intensity sound concentrated in low-frequency octave bands.
  • Mean computed noise dose was 108.5%.

Conclusions:

  • Extreme sound levels pose a hearing damage risk per OSHA standards.
  • Typical listening durations reported by owners suggest lower risk for the majority.
  • Further research may be needed for long-term effects.