组成设备 音响设备由监听调音台;功放调音台;便携式调音台;功率放大器;动圈话筒;电容话筒;无线话筒;音箱;监听音箱;功放音箱; 超低音箱;均衡器;混响器;效果器;延时器;压缩器;限幅器;分音器;噪声门;激光唱机;录音卡座;影碟机;投影机;变调器;点歌器 ;耳机等众多设备组成。
Professional audio equipment consists of monitoring mixer; Power amplifier mixer; Portable mixer; Power amplifier; Moving coil microphone; Condenser microphone; Wireless microphone; loudspeaker box; Monitor speaker; Power amplifier speaker; Subwoofer; Equalizer; Reverberators; Effector; Delay device; Compressor; limiter; Sound splitter; Noise gate; CD player; Recording card holder; DVD Player; Projector; Modulator; Song ordering device; Headphones and many other devices.
组成设备的介绍
Brief introduction of the constituent equipment
功率放大器
power amplifier
功率放大器利用三极管的电流控制作用或场效应管的电压控制作用将电源的功率转换为按照输入信号变化的电流。因为声音是不同振幅和 不同频率的波，即交流信号电流，三极管的集电极电流永远是基极电流的β倍，β是三极管的交流放大倍数，应用这一点，若将小信号注入基 极，则集电极流过的电流会等于基极电流的β倍，然后将这个信号用隔直电容隔离出来，就得到了电流(或电压)是原先的β倍的大信号，这现 象成为三极管的放大作用。经过不断的电流放大，就完成了功率放大。
The power amplifier uses the current control function of triode or the voltage control function of FET to convert the power of power supply into current varying according to the input signal. Because sound is a wave with different amplitudes and frequencies, that is, AC signal current, the collector current of triode is always the same as the base current β Times, β Is the AC amplification factor of the triode. If a small signal is injected into the base, the current flowing through the collector will be equal to that of the base β Times, and then isolate the signal with a DC isolation capacitor to obtain that the current (or voltage) is the original β This phenomenon becomes the amplification effect of triode. After continuous current amplification, the power amplification is completed.
动圈话筒
Moving coil microphone
动圈话筒动圈式话筒，动圈式传声器)是把声音转变为电信号的装置。动圈式 话筒是利用电磁感应现象制成的，当声波使金属膜片振动时，连接在膜片上的线圈(叫做音圈)随着一起振动，音圈在磁铁的磁场里振动 ，其中就产生感应电流(电信号)，感应电流的大小和方向都变化，变化的振幅和频率由声波决定，这个信号电流经扩音器放大后传给扬声器 ，从扬声器中就发出放大的声音。
Dynamic microphone (dynamic microphone, dynamic microphone) is a device that converts sound into electrical signals. The dynamic coil microphone is made by electromagnetic induction. When the sound wave vibrates the metal diaphragm, the coil connected to the diaphragm (called voice coil) vibrates together. The voice coil vibrates in the magnetic field of the permanent magnet, in which the induced current (electrical signal) is generated. The magnitude and direction of the induced current change. The amplitude and frequency of the change are determined by the sound wave. The signal current is amplified by the loudspeaker and transmitted to the loudspeaker, An amplified sound is emitted from the speaker.
音箱是整个音响系统的终端，其作用是把音频电能转换成相应的声能，并把它辐射到空间去。它是音响系统极其重要的组成部分，因为它 担负着把电信号转变成声信号供人的耳朵直接聆听这么一个关键任务，它要直接与人的听觉打交道，而人的听觉是十分灵敏的，并且对复杂声 音的音色具有很强的辨别能力。由于人耳对声音的主观感受正是评价一个音响系统音质好坏的重要的标准，因此，可以认为，音箱的性能高 低对一个音响系统的放音质量是起着关键作用。
The speaker is the terminal of the whole sound system. Its function is to convert audio electric energy into corresponding sound energy and radiate it to space. It is an extremely important part of the sound system, because it undertakes the key task of transforming electrical signals into acoustic signals for human ears to listen directly. It should deal directly with human hearing, which is very sensitive and has a strong ability to distinguish the timbre of complex sounds. Because the subjective feeling of human ears is the most important standard to evaluate the sound quality of a sound system, it can be considered that the performance of speakers plays a key role in the playback quality of a sound system.
各位顾客，以上对于
多媒体会议音响知识分享，希望能帮助大家，在使用中有任何疑问，请随时联系相关人员，我们将为您提供周到的技术支持服务。
Dear customers, the above is about multimedia conference sound Knowledge sharing, hope to help you. If you have any questions in use, please feel free to contact relevant personnel, and we will provide you with thoughtful technical support services.
