Six technical requirements for outdoor stage sound configuration

不少人认为室内和室外舞台音响设备和系统是一样的，其实由于场地不同，往往使用的舞台音响也会有所不同。所以不能用同一个方案来配置不同的舞台音响，今天就来说说室外舞台音响的一些要求，当然具体问题要具体分析，这些要求只是适用大部分室内舞台的音响配置。

Many people think that indoor and outdoor stage sound equipment and systems are the same, in fact, because the venue is different, often used stage sound will be different. So we can not use the same program to configure different stage sound, today we talk about some requirements of outdoor stage sound, of course, specific problems to be analyzed, these requirements are only applicable to most indoor stage sound configuration.

一、音响系统要有强大的功率储备：室外的露天声场，需要有强大的功率，因为室外声场要提高3db的声压级，功率就需要增大10倍，根据公式10logp2 /p1 =xdb,可以计算出声场具体的数值。

1. Sound system must have a strong power reserve: outdoor open-air sound field, need a strong power, because outdoor sound field to increase the sound pressure level of 3 db, the power needs to increase 10 times, according to the formula 10 logp2 / P1 = xdb, can calculate the specific value of the sound field.

二、要吊装扬声器：室外文艺演出音箱置放位置不能过低，低位音箱声波容易被观众人体吸声，产生掠射吸声现象，尤其使中高音频损耗极大，所以要采用吊装扬声器方式安装，中音或高音号角和室外专用音箱(音箱内装有大功率高音号角)，这样扬声器的声波在空中辐射的距离比较远，使观众席能够得到足够的响度。

2. To hoist loudspeakers: outdoor literary and artistic performances can not be placed too low sound box, low-level sound box is easy to be absorbed by the audience, grazing sound absorption phenomenon, especially high and medium frequency loss is great, so hoisting loudspeakers to install, medium or high-pitch horn and outdoor special loudspeakers (loudspeakers are installed with great power). The loudspeaker's sound waves radiate far in the air so that the auditorium can get enough loudness.

三、选择高灵敏度mic：这样可以增强mic的传声增益，使观众席能够得到足够的响度。室外演出往往MIC与调音台的距离都较远，所以可以适当的选用无线MIC进行拾音为佳。

3. Select high-sensitivity mic: this can enhance the sound transmission gain of mic, so that the auditorium can get enough loudness. Outdoor performance often MIC and mixing station are far away, so the appropriate choice of wireless MIC pickup is better.

四、保护电源线路：音箱系统的能源是来自于电网电路，如果电源电路出现故障音响系统将发生问题。所以电源电路应该由当地专业电工来进行技术保障工作。整个线路调音台至室内电闸或临时发电车，应由专门保安人员保护。

4. Protecting the power supply line: The energy source of the speaker system comes from the power grid circuit. If thelfdinuan.75ix.comhdjiankong.75ix.comqhdqingdian.75ix.comkongtiaob.75ix.commument.75ix.com

caigangt.75ix.com  power supply circuit breaks down, the sound system will have problems. Therefore, the power supply circuit should be carried out by local professional electricians for technical support. The whole line mixer, indoor switch or temporary generator car shall be protected by special security personnel.

五、保护扬声器线：室外演出功率放大器与音箱的距离，一般都比较远，为了防止音箱线断路和短路造成故障和损坏功放，所以要有专人来保护扬声器线路，功率放大器的输出阻抗很小，只有几个欧姆，可是声功率很大，所以电流也比较大，这条线距离不易过长，而且截断面积不要过小，以免造成不必要的声功率损耗，如果有条件的话，可以将功率放大器置于音箱较近的位置减小无谓的损耗。

5. Protecting the loudspeaker line: The distance between the power amplifier and the loudspeaker is generally quite far. In order to prevent the fault and damage of the amplifier caused by the breaking and short circuit of the loudspeaker line, a special person should be required to protect the loudspeaker line. The output impedance of the power amplifier is very small, only a few ohms, but the sound power is very large, so it is necessary to have a special person to protect the loudspeaker line. The current is also relatively large, the distance between the lines is not easy to be too long, and the sectional area should not be too small, so as to avoid unnecessary sound power loss, if conditions permit, the power amplifier can be placed closer to the speaker position to reduce unnecessary loss.

六、音响师要与观众席的助手通过对讲机保持联系：使音响师能够更准确的更及时的掌握观众席的音响效果，以便及时的进行调整。

6. The acoustician should keep in touch with the assistant in the auditorium through the intercom to enable the acoustician to grasp the auditorium's acoustical effect more accurately and timely so as to make timely adjustments.