| 摘要 |
PURPOSE:To provide a stereophonic sound field alarm device, which can restrict a change of image small even in the case where the driver's position is changed to facilitate the accurate static positioning and which does not give the uncomfortable feeling. CONSTITUTION:To position an image statically at a position of article, which is detected by an article detecting means 10 such as a pulse laser radar or the like, the sound of a low frequency area is used and the amplitude and phase thereof are controlled by an amplitude and phase control means 22 in response to the angle and distance in right and left direction, and it is output from plural speakers 30, and the sound at a specified frequency, for example at 4kHz or 1kHz, is added in response to the forward and backward direction of the image. Since the sound in a low frequency area is used as the base, static positioning in right and left direction is facilitated, and the sound matches the audio characteristic by adding the sound at a specified frequency to secure the static positioning in the forward and the backward direction. |
