A device for reducing noise in an interior space of a vehicle is provided. The vehicle includes a body having the interior space, at least one tire, and one wheel rim associated with the tire. The tire and the wheel rim are mounted onto a suspension strut, and the suspension strut is mounted onto the body. The device is arranged outside the interior space of the vehicle. The device includes a sound determination unit and a sound reduction unit. The sound determination unit includes a sensor configured for determining structure-borne noise. The sound reduction unit is configured for generating a vibration.

An anti-collision longitudinal self-adaptive adjusting system includes a host vehicle, an external environment sensing module, a cabin internal status sensing module and a controller. A self-adaptive deceleration command calculating unit calculates a self-adaptive deceleration command at least according to a maximum deceleration threshold, a seatbelt dataset and a passenger standing dataset and calculates a suspension damper command according to the self-adaptive deceleration command. A self-adaptive deceleration command output unit calculates a braking point distance at least according to a system operating delay time and the self-adaptive deceleration command so as to obtain a brake start-till-stop time. If the brake start-till-stop time is larger than or equal to the obstacle collision time, the self-adaptive deceleration command is output to the propulsion module and the braking module for adjusting the longitudinal velocity, and the suspension damper command is output to the suspension module for adjusting the suspension damper.