关于相位问题，济南音响的相关讲解
2015-5-26 14:58:02 点击：
1、对于电路中的相位问题，目前国产测试有些设备可以直接地检测出线路中是否有反相问题。但不能整个电路连接好之后再测，如果中间有两条串接的线反相，则负负得正。所以电路中需要分段测量其相位。 1/3 图中左边是输入信号的电压和电流波形,右边是扬声器的速度和位移波形,在某一时间点各有不同或 相同的相位差。在某一频率,各波形的相位差是固定的某值,不随时间变化。
1. For the phase problem in the circuit, there are some equipments which can directly detect whether the reverse phase is in the circuit.. But not the entire circuit connection tests, if there are two tandem line inversion, is negative positive. So the phase of the circuit needs to be measured.. In the left of the 1/3 diagram, the voltage and current waveforms of the input signal are the right of the speaker's velocity and the displacement waveform. At a time point, there are different or the same phase difference.. At a certain frequency, the phase difference of each wave is fixed, and the phase difference is not changed with time..
2、济南音响 http://www.jnzqyx.com/ 的电源相位。 如果一套音响系统中设备所采用的电源相位不一致，例如：功放用A相供电，调音台或周边用B相供电，当设备消耗电功率程度不平衡时，相位高与低所产生的差异，会使某些设备电压高或低导致工作不正常,从而对整个系统带来一些不良的干扰，如：哼声、电流声等，也有可能会因为相位差异过大引起设备的损坏。
2, Ji'nan audio power phase. If a set of sound system equipment used by power supply phase inconsistent. For example: power amplifier by a power supply, mixer or surrounding with B - phase power supply, when the device consumes electric power imbalances phase high and low and produced the differences, so that the voltage of some equipment is high or low lead is not working properly, in order to bring some undesirable disturbance of the whole system, such as: hum, current noise and so on, there may because of the phase difference is too large cause equipment damage.
解决方法：音响系统中最好使用同相电源供电，或者A、B、C相电源供电尽量分配平衡，以免出现上述不良干扰。通常的做法都是用同相电源供电，因为要使A、B、C相电源供电平衡是件比较烦琐的事。
Solution: sound system best use in phase power supply, or A, B, C power supply power distribution as far as possible to avoid the above adverse interference. Is typically used in power supply, because to make A, B, C power supply balance is a relatively cumbersome.
3、音源拾音部份（话筒相位）。 话筒相位是指如果有多支话筒同时使用，有一支话筒反相，会导致整体拾音产生不平衡感。拾音话筒接近者，会抵消信号，声音发闷，动态不足，有压抑感。而同相的二支话筒近距离一起拾音时，易造成信号重叠，加大正反馈的产生，从而产生自激（声反馈现象）。话筒相位反相的原因也有可能是话筒线插头焊掉了或者是焊接反了。出现反相后，要对话筒间相位做同一校正，使所有的话筒间输出信号相位保持同相状态。
3, the audio pickup part (microphone phase). The microphone phase is if there are a plurality of microphones at the same time, there is a microphone inverting, will lead to the overall pickup and generate a sense of imbalance. Pick up the microphone close to the receiver, will offset the signal, the sound of the stuffy, the dynamic shortage, a sense of depression. When the two microphones are picked up in the same phase, they are prone to overlap and generate the positive feedback. Thus, the self excited (acoustic feedback phenomenon) is generated.. The reason for the phase inversion of the microphone may also be the microphone wire plug welded or welded anti. After the reverse phase, the phase between the microphone should be corrected and the phase of the output signal of the microphone is kept in phase..
1. For the phase problem in the circuit, there are some equipments which can directly detect whether the reverse phase is in the circuit.. But not the entire circuit connection tests, if there are two tandem line inversion, is negative positive. So the phase of the circuit needs to be measured.. In the left of the 1/3 diagram, the voltage and current waveforms of the input signal are the right of the speaker's velocity and the displacement waveform. At a time point, there are different or the same phase difference.. At a certain frequency, the phase difference of each wave is fixed, and the phase difference is not changed with time..
2、济南音响 http://www.jnzqyx.com/ 的电源相位。 如果一套音响系统中设备所采用的电源相位不一致，例如：功放用A相供电，调音台或周边用B相供电，当设备消耗电功率程度不平衡时，相位高与低所产生的差异，会使某些设备电压高或低导致工作不正常,从而对整个系统带来一些不良的干扰，如：哼声、电流声等，也有可能会因为相位差异过大引起设备的损坏。
2, Ji'nan audio power phase. If a set of sound system equipment used by power supply phase inconsistent. For example: power amplifier by a power supply, mixer or surrounding with B - phase power supply, when the device consumes electric power imbalances phase high and low and produced the differences, so that the voltage of some equipment is high or low lead is not working properly, in order to bring some undesirable disturbance of the whole system, such as: hum, current noise and so on, there may because of the phase difference is too large cause equipment damage.
解决方法：音响系统中最好使用同相电源供电，或者A、B、C相电源供电尽量分配平衡，以免出现上述不良干扰。通常的做法都是用同相电源供电，因为要使A、B、C相电源供电平衡是件比较烦琐的事。
Solution: sound system best use in phase power supply, or A, B, C power supply power distribution as far as possible to avoid the above adverse interference. Is typically used in power supply, because to make A, B, C power supply balance is a relatively cumbersome.
3、音源拾音部份（话筒相位）。 话筒相位是指如果有多支话筒同时使用，有一支话筒反相，会导致整体拾音产生不平衡感。拾音话筒接近者，会抵消信号，声音发闷，动态不足，有压抑感。而同相的二支话筒近距离一起拾音时，易造成信号重叠，加大正反馈的产生，从而产生自激（声反馈现象）。话筒相位反相的原因也有可能是话筒线插头焊掉了或者是焊接反了。出现反相后，要对话筒间相位做同一校正，使所有的话筒间输出信号相位保持同相状态。
3, the audio pickup part (microphone phase). The microphone phase is if there are a plurality of microphones at the same time, there is a microphone inverting, will lead to the overall pickup and generate a sense of imbalance. Pick up the microphone close to the receiver, will offset the signal, the sound of the stuffy, the dynamic shortage, a sense of depression. When the two microphones are picked up in the same phase, they are prone to overlap and generate the positive feedback. Thus, the self excited (acoustic feedback phenomenon) is generated.. The reason for the phase inversion of the microphone may also be the microphone wire plug welded or welded anti. After the reverse phase, the phase between the microphone should be corrected and the phase of the output signal of the microphone is kept in phase..
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