一场精彩的演出不仅需要演员，而且对舞台灯光和音响设备也有严格的控制和要求。许多人认为舞台声音是扬声器和混音器。事实上，舞台音响设备需要10种不同的设备来支撑整个舞台音响系统，才能充分发挥舞台音响效果。让我们看看具体的设备：
A wonderful performance not only needs actors, but also has strict control and requirements for stage lighting and sound equipment. Many people think of stage sound as speakers and mixers. In fact, professional stage audio equipment needs 10 different equipment to support the whole stage audio system in order to give full play to the stage audio effect. Let's look at the specific equipment:
音响设备
Professional audio equipment
1.混音器：一种多声道输入的混音装置，每个声道的声音可以单独处理，左右声道的输出、混音、监听等，是音响工程师、录音师和作曲家创作音乐和声音的重要设备。
1. Mixer: a multi-channel input mixing device. The sound of each channel can be processed separately. The output, mixing and monitoring of left and right channels are important equipment for sound engineers, recorders and composers to create music and sound.
2.功率放大器：将音频电压信号转换为额定功率信号以驱动扬声器发声的装置。
2. Power amplifier: a device that converts the audio voltage signal into rated power signal to drive the speaker to sound.
功率放大器功率的匹配条件为：
The matching conditions of power amplifier power are:
(1)功率放大器的输出阻抗等于扬声器的负载阻抗。
(1) The output impedance of the power amplifier is equal to the load impedance of the loudspeaker.
(2)功率放大器的输出功率与扬声器的标称功率匹配。
(2) The output power of the power amplifier matches the nominal power of the speaker.
3.分频器：实现分频的电路或装置称为分频器。分频器有很多种。根据其分频信号的波形，有正弦分频和脉冲分频。其基本功能是根据组合扬声器的要求，将全频段音频信号划分为不同的频段，使扬声器单元能够得到合适频段的激励信号，并在佳状态下工作。
3. Frequency divider: the circuit or device that realizes frequency division is called frequency divider. There are many kinds of frequency dividers. According to the waveform of its frequency division signal, there are sinusoidal frequency division and pulse frequency division. Its basic function is to divide the full frequency band audio signal into different frequency bands according to the requirements of the combined speaker, so that the speaker unit can get the excitation signal of the appropriate frequency band and work in the best state.
4.混响器：在歌舞厅和大型舞台灯光音乐会场地的音响系统中，人声的混响处理是一个非常重要的部分。经过混响处理后，人们的歌唱能产生一种电子声音的美感，使歌唱具有独特的魅力。它可以掩盖一些业余歌手声音中的一些缺陷，如嘶哑、喉咙和尖锐的声带噪音，使声音不那么难听。此外，混响还可以弥补没有经过专门声乐训练的业余歌手在音色结构中缺少泛音的缺陷。这对于舞台灯光音乐会的效果非常重要。
4. Reverberator: in the sound system of song and dance halls and large stage lighting concert venues, the reverberation processing of human voice is a very important part. After reverberation processing, people's singing can produce an electronic sound beauty, which makes singing have unique charm. It can cover up some defects in the voice of some amateur singers, such as hoarseness, throat and sharp vocal cord noise, so that the voice is not so ugly. In addition, reverberation can also make up for the lack of overtone in the timbre structure of amateur singers without special vocal training. This is very important for the effect of stage lighting concert.
5.变调：由于人们的声音条件不同，在演唱时对伴奏音乐的音调有不同的要求。有些人想要低一点，而另一些人需要高一点。这样就要求伴奏音乐的音色要符合演唱者的要求，否则就会觉得演唱和伴奏很不和谐。如果使用样式带，则需要使用调谐器进行调制处理。
5. Tone change: due to different sound conditions, people have different requirements for the tone of accompaniment music during singing. Some people want to be lower, while others need to be higher. This requires the timbre of the accompaniment music to meet the requirements of the singer, otherwise it will feel that the singing and accompaniment are very disharmonious. If you use a style band, you need to use a tuner for modulation processing.
音响设备
Professional audio equipment
6.效应器：提供声场效果的音响设备，包括混响、延迟、回声和声音的特殊处理。
6. Effector: sound equipment providing sound field effect, including reverberation, delay, echo and special processing of sound.
