| 摘要 |
PURPOSE:To automatically attain the optimum sound field always centered at a human body with the minimum operation by adding a thermal picture detection means consisting of pyroelectric thermal detection element groups added to the sound field device. CONSTITUTION:A thermal picture detection means 3 is installed on an acoustic device 1, detecting the direction, size, and number of the human body. A sound field control means forms the sound field optimum for the person located at an arbitrary position. The means 3 contains a plurality of pyroelectric thermal detection element groups, utilizing the pyroelectric effect in a thermal infrared- ray sensor. A wireless remote controller selects an input to set the tone and volume, the information is sent from a wireless transmission means through a receiver to the main body of the device. According to the setting, the main body 1 starts operating. At the same time, the means 3 detects a thermal image and a means for discriminating human body and a means for detecting the position of human body specify the number and position of the human body. The sound field decision means decides the sound field to set the angle and adjust the volume. |
