| 摘要 |
PURPOSE:To secure a service area wherein an excellent sound is obtained on any weather condition by adjusting the azimuths and elevations of speakers and sound outputs according to the geographical and weather conditions of the circumferences of plural speakers. CONSTITUTION:While the geographical and four-season weather condition of the speakers 1 and 1' are considered, a wind speed sensor or sound collecting microphone 3 is installed at one or more positions. A control part 4 has a storage part, which holds the individual values of the direction and speed of a wind, data for determining the azimuth and/or elevation of the speaker to sound pressure applied to the sound collecting microphone 3, and data for determining the output of a sound-reinforcement device. Further, the outputs of the wind speed sensor and sound collecting microphone are received and the data in the storage part are referred to; and the speakers are directed in the suitable azimuths according to the current weather conditions by driving a driving part 2 and the output of the sound-reinforcement device is also controlled. The control part 4 furthermore adjusts the directions and sounds of the speakers 1 and 1' adequately by a manual operation switch 6. |
