Patent ID: 8724821
Filing Date: 2014-05-13
Classification: H04S

Abstract:
1. A sound field controller, comprising: an input section to which an audio signal is input; a sound field generation section which generates an effect sound signal for giving a sound field effect sound to the audio signal; an acquisition section which acquires a measurement signal indicating sound pressure levels of a direct sound and a reflected sound which are collected when a test sound is emitted in a reproduction environment; an identification section which identifies a maximum reflected sound whose sound pressure level is the maximum in a given time period after a collecting timing of the direct sound from the measurement signal acquired by the acquisition section; an adjustment section which adjusts the effect sound signal generated by the sound field generation section based on a ratio of the sound pressure level of the direct sound to the sound pressure level of the maximum reflected sound; and an output section which outputs the audio signal input to the input section and the effect sound signal adjusted by the adjustment section.