This International Standard is applicable to instruments for measurement of A-frequency-weighted
sound exposure resulting from steady, intermittent, fluctuating, irregular, or impulsive
sounds. Instruments complying with the specifications of this International Standard are
intended to be worn on a person to measure sound exposure. Measurements of sound
exposure in the workplace may be useful for determinations of occupational noise exposure, in
accordance with ISO 1999 and ISO 9612.