Abstract
Noise is defined as any unwanted sound, and the health effects of noise have been well documented. Exposure to high levels of sound pressure can lead to hearing loss, tinnitus, and other health problems. Recently, there has been increasing concern about the potential health effects of exposure to ultrasound. Many countries have included ultrasonic noise on the list of factors hazardous to health in the working environment. Even though the frequency range above 20 kHz has been studied, there is not enough information regarding how it affects the human body. In addition, there are not any international standards for assessing ultrasonic noise at the work stations. While recent studies have helped advance the knowledge base in this area, they are still missing a considerable amount of data. This includes research into possible health consequences and improved dosimetry.
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