Online measurement and detection standard device of automatic environmental noise monitoring system

The utility model relates to an online measurement and detection standard device of an automatic environmental noise monitoring system. According to the online measurement and detection standard device, two microphone holes are opened on a muffler pipe, one microphone hole is used for placing a standard microphone, and the other microphone hole is used for placing a microphone to be detected; the microphone to be detected is a part of a monitoring terminal; the standard microphone is connected with a data acquiring terminal of a signal analyzer in a signal mode; a loudspeaker is installed at one end in the muffler pipe and connected with a power amplifier in a signal mode, and the power amplifier is connected with an electrical signal transmitting terminal of a signal generator in a signal mode; a wedge is arranged at the other end in the muffler pipe; the muffler pipe is supported by an external universal wheel; and the signal analyzer is connected with an upper computer in a signal mode. By means of the onl