Abstract

. Some lasers produce a loud photo-acoustic effect when treating skin. Although safety issues with regard to eye and skin protection are well known, we were unable to find any literature relating to noise production. We therefore measured the sound levels produced by three Erbium-YAG lasers (Continuum Biomedical 1J and 2J, and Laserscope). Measurements were made at distances of 50 and 5 cm, to represent levels reaching the laser-user and the patient, respectively, at a variety of energy (0.5, 1, 1.5 and 2 J) and spot settings (2, 3.5, 5 and 7 mm).

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