| 摘要 |
A microphone (50) is connected directly to an amplifier (60) linked to a stop position switch (70). Coupled in antiphase to the amplifier's output signal, a loudspeaker (40) is connected to a vehicle's boot space at the rear as well as to its outside. Booming noises occur only when an area like a window or a sunroof is open. With this device these areas have the stop position switch which triggers the amplifier compensating for noise interference. |
