シュウハスウ リョウイキ デノ ブブンテキ モデル マッチング ニ モトヅク ステレオ オンバ セイギョケイ セッケイ

The objective for sound field control is to make acoustic characteristics of a listening room be close to those of the desired system. Conventional methods used to apply feedforward controllers such as digital filters to achieve this objective, however, feedback controllers were also necessary in order to attenuate noise or to compensate uncertainty of acoustic characteristics of the listening room. Since acoustic characteristics are well modeled on frequency domain, it is efficient to design controllers from the view point of frequency responses, but it is significantly difficult to design multi input multi output (MIMO) control system on wide frequency domain. In this paper, partial model matching method on frequency domain was adopted because this method required only sampled data instead of complex mathematical models c)f the plant in order to design controllers for MIMO systems.The method was applied to design 2 degree-of-freedom controllers for acoustic equalization and noise reduction. Experiments showed effectiveness of the proposed method