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Related Experiment Videos

Noise exposure in the rural setting

J J Holt1, S K Broste, D A Hansen

  • 1Department of Otolaryngology, Marshfield Clinic, WI 54449.

The Laryngoscope
|March 1, 1993
PubMed
Summary

Tractor noise levels can exceed safe limits, especially without cabs. Hearing protection is recommended after 1.5-4 hours of operation, depending on cab presence and radio use.

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Area of Science:

  • Agricultural Engineering
  • Occupational Health
  • Acoustics

Background:

  • Tractor noise exposure is a significant occupational health concern for farmers.
  • Understanding noise levels is crucial for preventing hearing loss in agricultural workers.

Purpose of the Study:

  • To quantify noise levels experienced by tractor drivers.
  • To assess the impact of tractor cabs and radio usage on noise exposure.
  • To provide recommendations for hearing protection.

Main Methods:

  • Noise levels were measured at the driver's ear on 155 tractors across 36 farms.
  • Data were collected with radios off and windows closed, and also considering cab presence and radio usage.
  • Statistical analysis was performed to determine significant differences and impacts.

Main Results:

  • Noise levels ranged from 78 to 103 dB.
  • Tractors without cabs exceeded 90 dB in 75% of cases, versus 18% for tractors with cabs.
  • Radio use increased noise by an average of 3.1 dB, and open windows with the radio on added 4.2 dB.

Conclusions:

  • Hearing protection is advised for tractor operation.
  • Recommended protection times vary: 1.5-2 hours for tractors without cabs, and 3-4 hours for those with cabs.
  • Limited radio use is suggested to minimize noise exposure.

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