1.报告厅音响传声器的调整
1. Adjustment of microphone in lecture hall
报告厅音响系统中同时使用的传声器一般情况下应该是同相位的。在工程交付使用之前需将系统中所有传声器的相位都校正成同相的。在使用中由于特殊需要而要求将个别传声器接成反相位时，可利用调音台上的相位倒置开关或者插入一段。反相线&诲别驳;。
The microphones used simultaneously in the sound system of the lecture hall should generally be in phase. Before the project is delivered for use, the phase of all microphones in the system shall be corrected to be in phase. When the individual microphone is required to be connected to the reverse phase due to special needs in use, the phase inversion switch on the mixer can be used or a section can be inserted. Reverse phase line °.
检验传声器相位的方法很简单，若两个传声器是同相位的，则这两个传声器指向同一声源时音量会明显增加若两个传声器是反相的，则这两个传声器同时使用音量反而减小。调整时，可任选一个传声器作基准，将系统中所有的传声器都与之比较，将相位与之相同的归为一类，相位与之不同的归为另&尘颈诲诲辞迟;类。将为数较少的一类传声器的相位进行调整，即把卡侬插接件上的2脚与3脚的接线互换，便可实现相位调整。
The method to check the microphone phase is very simple. If two microphones are in phase, the volume will increase significantly when the two microphones point to the same sound source. If the two microphones are in phase, the volume will decrease when the two microphones are used at the same time. During adjustment, any microphone can be selected as the reference, and all microphones in the system can be compared with it. Those with the same phase can be classified into one category, and those with different phase can be classified into another category. Adjust the phase of a small number of microphones, that is, interchange the wiring of 2 pins and 3 pins on the XLR connector to realize the phase adjustment.
2.报告厅音响房间均衡器的调整
2. Adjustment of the equalizer in the sound room of the lecture hall
房间均衡器&尘颈诲诲辞迟;&尘颈诲诲辞迟;般要借助粉红噪声发生器和实时频谱仪才能精确调整。报告厅音响房间均衡器主要用于对房间频率特性进行修正和补偿。因此在调试时应保证厅堂的环境与实际听音环境的&尘颈诲诲辞迟;致性，另外，房间均衡器的调整，有时需与音箱布局的调整结合起来。
The room equalizer can only be accurately adjusted with the help of pink noise generator and real-time spectrometer. The audio room equalizer in the lecture hall is mainly used to correct and compensate the room frequency characteristics. Therefore, during debugging, the consistency between the hall environment and the actual listening environment should be ensured. In addition, the adjustment of room equalizer sometimes needs to be combined with the adjustment of speaker layout.
报告厅音响房间均衡器是通过改变信号的频率特性来实现对环境频率特性的补偿。对频率特性的改变不可避免地会引致相位特性的改变，引起相位失真。当房间均衡器的调整量过大时，尤其是在某段不宽的频带中又必须以很大的调整量才可达到均衡效果时，虽然房间的频率特性被修正了，但因为相位失真的关系，听感会变得很差，对立体声系统这种情况将更为突出。
The equalizer in the audio room of the lecture hall compensates the environmental frequency characteristics by changing the frequency characteristics of the signal. The change of frequency characteristics will inevitably lead to the change of phase characteristics and phase distortion. When the adjustment amount of the room equalizer is too large, especially in a narrow band, it must be adjusted with a large amount to achieve the equalization effect. Although the frequency characteristics of the room are corrected, the listening sense will become very poor due to the phase distortion, which will be more prominent for the stereo system.
在建声条件不佳的情况下，房间均衡器的调整有时只能在频率特性与听感之间折中。强求频率特性的平坦结果有时反而弄巧成拙。的办法是改进房间自身的声学特性。
In the case of poor building sound conditions, the adjustment of room equalizer can sometimes only compromise between frequency characteristics and listening sensation. The flat result of forcing frequency characteristics is sometimes self defeating. The best way is to improve the acoustic characteristics of the room itself.
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