Electric sound signal tester for computer acoustic card

The utility model relates to an electro-acoustic testing device, in particular to an electro-acoustic testing device by use of the sound card of the microcomputer, comprising a microcomputer, a sound card and a signal controller; wherein, the serial communication port of the microcomputer is connected with the signal input terminal of the signal controller, the signal output terminal and linear stereo input terminal of the sound card are respectively connected with the signal input terminal of the signal controller and the stereo detection output terminal; moreover, the testing output terminal of the signal controller is out connected with a speaker, and a microphone connects the corresponding input terminal of the signal controller. The utility model has a simple and economical design and uses the sound card to process signal; moreover, as the Windows software is intuitional and easy, the utility model can test such parameters of electro-acoustic characteristics as the magnitude frequency curves, being intelligentized.