北京市音响设备厂

室外舞台音响配置的六大技术要求

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.