Patent ID: 9090332
Filing Date: 2015-07-28
Classification: B60R,B64C,G10K,Y02T

Abstract:
1. A noise reduction device comprising: a noise detecting unit detecting noise emitted from noise sources; a noise control unit for generating a control sound signal to reduce noise detected by the noise detecting unit; and a control sound output unit for outputting a control sound based on the control sound signal from the noise control unit, wherein the noise reduction device is arranged at at least one of a plurality of seats; each of the plurality seats includes a seat portion having a headrest and a shell portion surrounding the seat portion by its wall surface; the shell portion includes a bulged section having a width in a direction that a passenger sits at the seat portion, the bulged section is located behind the seat portion and has a cavity at a position opposed to the headrest of the seat portion; the control sound output unit is installed in the cavity of the shell portion; and the cavity is used for a sound space and integrated into the shell portion.