Category for specialized equipment dedicated to measuring and monitoring noise and vibration levels in manufacturing sites. Includes measuring instruments for accurately measuring noise and vibration generated from industrial machinery such as press machines, compressors, and grinding machines, and for confirming compliance with occupational safety and health laws and environmental standards. Covers sound level meters (ordinary and precision sound level meters), vibration meters (accelerometers and vibration level meters), measuring instruments with frequency analysis functions, and continuous monitoring systems equipped with data logger functions. Used for noise measurement in factory work environments, evaluation of noise impact on neighboring areas, detection of abnormal vibration in machinery and equipment, and determination of maintenance timing. Clearly distinguished from other environmental measuring equipment (air quality and water quality analyzers), targeting only equipment with measurement functions specialized in acoustic and vibration phenomena.