Tadashi Ohashi

Coefficient updating method for an adaptive filter

Information collecting apparatus

Active noise reduction device for electronic apparatus

Method and apparatus of determining the sound transfer characteristic of an active noise control system

Document review apparatus, a document review system, and a computer product

Acoustic cooling system with noise reduction function

Knowledge processing system

Information searching system

Active noise control system with detouring sound apparatus

Integrated document management system, document retrieval device, and a computer-readable recording medium with a document retrieval program recorded therein