[AUDIO] IOT interest in expanding the acoustic structure of the product design _ Fourth, the hardware performance testing

First, the hardware performance testing machine - sealing - free field

1. In the free field, play 80dBSPL pink noise, the normal admission signal for each of the mic;
2 are each plugged mic, 1 repeat;
recording 3. The results of the above comparison of the two;
4. determining each mic can be admitted to the signal, and admission to the signal line with the trend of pink noise;
5. in the case of blocking and non-blocking, the difference signal of the same mic twice admission should be> 30dB, this case illustrates mic sealing better.

Second, the hardware performance testing machine - sealing - normal handheld

1. The mobile phone in the normal position of the HATS, the Echo test P501;
2. Start using the log mask to grasp log;
3. parsing log, see Nearend_Input node signal ;;
4. Check the echo amplitude to the primary receiver sub-mic, if primary mic signal amplitude is larger than the sub-mic, specify the presence of internal sealing problems.