Outdoor plaza stage sound pickup tricks.Anshun Bar Audio Manufacturing

　　For indoor theatrical performances such as theaters and stages, the first requirement is sound art. First of all, we must ensure the quality of sound, which is pleasant to the ears and beautiful. For outdoor and open-air theatrical performances, the first requirement is sound technology. In the event of an accident, the task of performing theatrical performances is successfully completed. Since outdoor theatrical performances are more difficult than indoor performances, there are also many specific technical requirements:

　　1. The audio system must have a strong power reserve: the outdoor open-air sound field needs a strong power, because the outdoor sound field needs to increase the sound pressure level by 3db, and the power needs to be increased by 10 times. According to the formula 10logp2 /p1 =xdb, you can Calculate the specific value of the sound field.

　　2. To hoist the speakers: the placement of outdoor theatrical performance speakers should not be too low. The sound waves of low-level speakers are easily absorbed by the audience, resulting in grazing sound absorption, especially for medium and high audio loss. Therefore, it is necessary to install speakers by hoisting , mid-range or high-pitched horns and outdoor special speakers (high-power high-pitched horns are installed in the speakers), so that the sound waves of the speakers radiate far in the air, so that the auditorium can get enough loudness.

　　3. Select a high-sensitivity mic, which can enhance the sound transmission gain of the mic, so that the auditorium can get enough loudness. In outdoor performances, the distance between the MIC and the mixer is often far, so it is better to choose a wireless MIC for sound pickup.

　　4, protect the power circuit: the energy of the speaker system comes from the power grid circuit, if the power circuit fails, the audio system will have problems. Therefore, the power supply circuit should be technically guaranteed by a local professional electrician. The entire line mixer to the indoor switch or temporary generator car should be protected by special security personnel.

　　5. Protect the speaker line: The distance between the power amplifier and the speaker for outdoor performances is generally relatively far. In order to prevent the speaker line from being broken and short-circuited, causing failure and damage to the power amplifier, a special person should be required to protect the speaker line. The output impedance of the power amplifier is very small. There are only a few ohms, but the sound power is very large, so the current is relatively large. The distance of this line is not too long, and the cut-off area should not be too small, so as to avoid unnecessary sound power loss. Place it closer to the speaker to reduce unnecessary loss.

　　6. The sound engineer should keep in touch with the assistant in the auditorium through the walkie-talkie, so that the sound engineer can grasp the sound effect of the auditorium more accurately and in a timely manner, so as to make timely adjustments.

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