| 摘要 |
PURPOSE:To form a natural sound field where a low-pass area can be sufficiently reproduced and an image is located at a normal front position and without making a person recognize the narrowness of a car room by providing the first to the third pairs of speakers. CONSTITUTION:An image can be located at a normal position in front of a listener with, for example, a direct sound outputted from an instrument panel speaker 8, and the image is located at the normal position further forward with a delayed signal. Also, when such state is observed from a driver's seat based on a reverberation sound outputted from a rear speaker 9, a spread is generated in the left space of the viewer, and also, the spread is generated even in the space at the door side of the viewer with a delayed high-pass component outputted from a door speaker 10. Furthermore, it is possible to sufficiently reproduce the low-pass area from the front of the listener even with the speaker having a comparatively small diameter with the low-pass component outputted from the door speaker 10, and a transfer frequency characteristic with peak of 200-250Hz proper to the car room can be added, then, a low-frequency sound can be reproduced with superior balance. |
