Acoustic feature computing apparatus, acoustic feature computing method, and program

An acoustic characteristics calculation device comprising:

• wherein Q is an integer equal to or greater than 2 and Lq (q=1, 2, . . . , Q) is an optical path in q-th measurement by an optical measurement device that measures a phase change of light due to radiated sound of a parametric speaker that is an object of acoustic characteristics measurement, and
• a measurement data acquisition circuitry configured to acquire a set of a phase change amount φq of light due to the radiated sound of the parametric speaker obtained in the q-th measurement by the optical measurement device and a parameter ρq that characterizes the optical path Lq in the measurement (q=1, 2, . . . , Q);
• and
• a sound field calculation circuitry configured to calculate a sound pressure at a point in a sound field that is generated by the radiated sound of the parametric speaker from the set of the phase change amount φq and the parameter ρq (q=1, 2, . . . , Q).