To solve the problem that it is necessary to convert a measurement output with a specified curve in measurement/analysis using a conventional specified curve, and that since a detected electric signal is directly used as a control signal in conventional acoustic effect adjustment, it is necessary to perform control by a sound pressure level unit as a result, and perform adjustment by a filter, an equalizer or the like.

The function constitution of a general measurement method is added with a "reverse characteristic filter" and a "unit conversion arithmetic operation" so that it is possible to output a measurement result by the unit of a specified curve such as an acoustic level in the measurement of an acoustic level and an NC level in the measurement of an NC level, and to perform the control of acoustic effect adjustment in the acoustic level.