Honda Giken Kogyo Kabushiki Kaisha

Hideki Sato

Tsuyoshi Yamashita

Hisashi Sano

Makoto Namekawa

Masaichi Akiho

Akira Suto

Kunio Miyauchi

Tetsu Kanamori

Kenji Imai

Syunichi Imanishi

A noise-canceling method for simultaneously canceling a plurality of harmonic components of the engine rotational speed contained in engine noise. Reference signals are generated in correspondence with a plurality of harmonic components, and an adaptive signal processing is executed by using each reference signal, a composite-sound signal of the engine sound and a composite noise-canceling sound at a noise-canceling point, thereby generating a noise-canceling signal. The noise-canceling signal is input to a speaker. The reference signal corresponding to a harmonic component of a low level is multiplied by a constant K before it is input to the speaker so as to approximately equalize the levels of all the harmonic components at the noise-canceling point.

Noise canceling method

Growing community of inventors

Iwaki, Japan

Hideki Sato