Opinion mailbox
Lightning headphone automatic test system
I. Function Overview
In order to solve the problem that Apple products cannot be directly controlled on the market, this solution uses the development of a WIFI-based APP (named: APPForIphone) on the Apple ipod touch to assist the test, so as to achieve the ability to play different test signals according to different test items. Parameters: Headphone Total Harmonic Distortion, Headphone Frequency Response, Microphone Frequency Response / Smartness, Microphone Total Harmonic Distortion.
System block diagram
Third, the test principle
3.1 Headphone audio test:
When the A2 audio analyzer starts the test, the artificial mouth plays the signal, and at the same time sends a command to the Apple ipod touch via WI-FI to start recording. The file formed by the recording is returned to A2 via WI-FI, and the analysis forms a frequency response curve.
3.2 Microphone audio test:
When the A2 audio analyzer starts testing, it sends instructions to the Apple ipod touch via WI-FI to start playing the signal. The signal received by the artificial ear returns to A2, forming a frequency response curve.