Exposure to Ultrasonic Cleaner Noise in the Canadian Forces
DEFENCE AND CIVIL INST OF ENVIRONMENTAL MEDICINE DOWNSVIEW (ONTARIO)
Pagination or Media Count:
The high-frequency noise produced by ultrasonic cleaning devices at CFB North Bay and CFB Trenton is sufficiently intense to produce effects such as nausea, headaches, tinnitus and fatigue among exposed personnel. Although the 20-kHz one-third octave-band sound pressure levels observed close to these units are well under 140 dB the level below which damage to the human ear is thought not to occur, they nevertheless exceed the levels recommended for hearing conversation 105 dB at an operators position, 95 dB within 15 feet of an operator. The most effective means of reducing the noise radiated from these cleaners is to contain each unit in an appropriately ventilated enclosure or room. Personnel operating or working close to units not enclosed should wear hearing protection.
- Stress Physiology
- Protective Equipment