文档介绍：咪头6050-规格书
tie
深圳市青兴电子有限公司
SHEN ZHEN QINGXING ELECTRONIC
ECM APPROVAL SHEET
客
After exposure at 40℃ and 90~95% relative humidity for 200 hours, the sensitivity to be within ±3dB from the initial sensitivity.
Temperature Cycle Test
After exposure at –25℃ for 30 minutes, at 20℃ for 10 minutes, at +60℃ for 30 minutes, at 20℃ for 10 minutes, 5 cycles, the sensitivity to be within ±3dB from the initial sensitivity.
Vibration Test
To be no interference in operation after vibrations,10Hz to 50Hz for 1 minute full amplitude ,for 2 hours at 3 axises.
Drop Test
To be no interference in operation after dropped to concrete floor each one time from 1 meter height at three directions in state of packing.
7. CONCEPT OF UNIT
The difference between concept of unit “Pascal” and the one of unit “μbar” can be explained as follows. In calibrating the sensitivity of ECMs,
The sensitivity is manifested differently according as the unit is “Pascal” or “μbar”.
That is , the sensitivity will be increased by 20 dB in the usage of unit “Pascal”.
Example:-60dB(0dB=1V/μbar)=-40dB(0dB=1V/Pa)
STANDARD TESTING
SENSITIVITY
REQUEST :
The tolerance of sensitivity is not over +/- 3dB to standard microphone.
TESTING WAY :
microphone with standard operating condition.
Put the microphone and standard microphone to face the sound output
place(speaker), the distance from sound output to microphone & standard microphone is 50cm. And keep the center distance 5cm between each other to ensure the sound pressure change should be keep in +/- 1dB.
Keep the output sound pressure in +/- 1dB from speaker.(Tested by standard microphone)
The sensitivity of microphone is getting its output voltage when sound output keep in 1000Hz & .
9. REGARDING THE SOLDERING OPERATION
THE ST