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Automotive bluetooth audio test system
1、Overview
With the development of car audio-visual entertainment information technology, the demand trend of car audio system is more and more obvious. Therefore, for the emerging technologies of automotive audio entertainment systems, the corresponding testing requirements are also constantly increasing. This paper will introduce the corresponding application test for the Bluetooth audio system of the car machine.
Nowadays, cars are basically equipped with in-vehicle Bluetooth function. You only need to connect your mobile phone to the car entertainment console to realize functions such as playing music and hands-free calling. The configuration of Bluetooth not only enhances the car's entertainment, but also plays a role in safe driving.
For the Bluetooth audio test of the car, it mainly includes Bluetooth music playback (Bluetooth audio output), and Bluetooth calls (Bluetooth audio input).
1.1、System Configuration
1.2、test link
Bluetooth audio output test of the car:
The bluetooth adapter U 984 is used for bluetooth A2DP connection with the car machine. Audioexpert generates an audio signal to U 984, and U 984 sends the signal to the car through Bluetooth, and the speaker of the car broadcasts the audio, and the free-field microphone collects the played audio, and then sends the collected audio back to Audioexpert through PM 6682 for analysis.
Car machine Bluetooth audio input (Bluetooth call) test:
The Bluetooth adapter U 984 is connected to the car machine with Bluetooth HFP. Audioexpert generates audio signals to PM 6682 and then broadcasts them from the artificial mouth. The car microphone collects the signals and transmits the signals to U 984 via Bluetooth, and then performs signal analysis through Audioexpert.
Core components
PM 6682,2in, 2out, balance & unbalance
PM 0083,4ch IEPE,3ch AMP, High end
AM 581,Artificial Mouth, Low Distortion
M 663+A 802,Free-field,20kHz,IEPE,1/2inch