一、技术与市场概况在文艺舞台上,各种乐器均需配备拾音用的传声器,亦称话筒,它还需要与支撑架子配合使用。例如二胡独奏表演,往往需要在乐手二胡前后设置2台传声器。在传声器的使用方法上,一般要求传声器对准声源(二胡)中心保持约20厘米左右的距离。如果距离太远了声源信号衰减,背景噪声电平增大,会影响拾音效果。对演奏者 First, the technology and market profile In the art stage, all kinds of musical instruments are equipped with pickup microphone, also known as the microphone, it also needs to be used in conjunction with the support shelf. For example, erhu solo performances often require two microphones before and after the musician erhu. In the use of the microphone, the general requirements of the microphone at the sound source (erhu) center to maintain about 20 cm distance. If the distance is too far, the sound source signal attenuation, the background noise level increases, will affect the pickup effect. To the performer