Acoustic test system of intelligent terminal
I. Smart audio is mainly divided into main control board, power amplifier board, MIC board and other auxiliary function boards
1. The main control board usually supports multiple working modes such as WIFI, Bluetooth, etc., and analyzes MIC's voice instructions.
2. Amplifier board realizes smart speaker voice playback
3.MIC board for voice instruction recording, usually 6 ~ 8 microphones recording at the same time
4. Other auxiliary function boards such as buttons, LEDs, etc.
Finished product test item:
Serial number |
Test project name |
Upper and lower limit |
unit |
||
Lower limit |
General value |
None |
|||
1 |
MIC sensitivity |
|
|
|
|
2 |
MIC signal to noise ratio |
|
|
|
|
3 |
MIC distortion |
|
|
|
|
4 |
MIC frequency response |
|
|
|
|
5 |
Leak test |
|
|
|
|
Third, the finished product test project
Serial number |
Test project name |
Upper and lower limit |
unit |
||
Lower limit |
General value |
None |
|||
1 |
MIC Frequency response |
|
|
|
|
2 |
MIC sensitivity |
|
|
|
|
3 |
MIC Distortion |
|
|
|
|
4 |
SPK Frequency response |
|
|
|
|
5 |
SPK distortion |
|
|
|
|