1 Electrical performance index
Standard conditions Basic test conditions
Room temperature: 5-35 ℃
Temperature: 20 plus or minus 2 ℃
Normal humidity: 45-85%
Humidity :67% to 63
Normal air pressure: 86-106 kPa
Normal air pressure: 86-106 kPa
2 Application circuit
3 Reliability Test
All tests shall be carried out in the same batch of tests in the sequence listed. The sensitivity should be within ±3dB of the initial sensitivity after 2 hours of restoration at 20℃
Temperature test: Sensitivity should be within ±3 dB of the initial value after 200 hours of exposure at 60°C. After 200 hours of exposure at -25°C, the sensitivity should be within ±3 dB of the initial value
Humidity test: After exposure for 200 hours at 60±3℃ and 90~95% relative humidity, the sensitivity should be within ±3 dB of the initial value
Temperature cycle test: 30 minutes of exposure at -25°C, 10 minutes at 20°C, 30 minutes at 60°C, and 10 minutes at 20°C. Sensitivity should be within the initial value ±3 dB after 15 cycles
Vibration test: To ensure that the vibration does not affect the use, 10 Hz to 50 Hz at a full amplitude of 1.52 mm for 1 minute, at 3 large angles for 2 hours.
Drop test: In order to ensure that the test microphone in the package falls off and does not affect its use, the 3 sides of the package are dropped from a height of 1.5 meters on the cement floor for 12 cycles
Electrostatic protection: The test microphone must discharge between each ESD exposure point (contact point :±6KV, air :±8KV)
4 Mechanical properties
Plate surface cleaning pressure is limited to 0.3Mpa
5. Packaging (Unit :mm)
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