J Korean Acad Pediatr Dent.  2020 Feb;47(1):62-69. 10.5933/JKAPD.2020.47.1.62.

Effect of Noise Cancelling Devices on Dental Handpieces Using Ear Model

  • 1Department of Pediatric Dentistry, College of Dentistry, Yonsei University
  • 2College of Dentistry, Yonsei University
  • 3Department of Conservative Dentistry, College of Dentistry, Yonsei University


This study intended to evaluate noise level of dental handpieces and the effects of noise cancelling devices. An ear model was designed to measure the level of the noise delivered to the inner ear during dental handpiece operation. The level of noise was measured in various conditions using the ear model and the portable noise meter. Noise level was measured again after applying of 4 different noise cancelling devices to the model ear.
The noise level of dental handpieces was 82.5 - 84.4 dB. When 4 types of noise canceling devices were applied, the noise level reduced to 67.4 - 73.8 dB. All 4 devices had statistically significant effect in reducing the noise of the handpiece.
Considering the intensity and exposure time, noise in dental clinics can cause hearing damage to dentists. For protection from the risk of occupational hearing damages, noise canceling devices can be recommended.

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