1.Product type
1.1 34mm pure gold coated capacitive microphone head
2. Performance parameters
2.1 Sensitivity -33(±3)dB(at 1KHz 0dB=1V/Pa)
2.2 pointing characteristics heart shape (at 1KHz)
2.3 Frequency response 20Hz-20KHz
2.4 Maximum sound pressure level 140dB (at 1KHz ≤ 1% T.H.D)
2.5 unit size φ34mmX13.5mm
3. Typical frequency response curve
3.1 Measurement conditions
Ambient temperature: 20±2°C
Reference sound pressure level: 1Pa (94 dBSPL at1 KHz)
3.2 test curve
4. Mechanical properties
4.1 size:
Installation adapter size: φ34x13.5 (mm)
5. Reliability test
5.1 vibration test
At a frequency of 10 Hz to 5 Hz, the full-axis vibration of 2 mm per minute is 2 mm, and after 2 hours, the sensitivity changes within ±3 dB.
5.2 high and low temperature test
Placed at 60 ° C for 24 hours, transferred to room temperature at 20 ° CC for 2 hours, the sensitivity changes within ± 3 dB
Placed at -10 ° C for 24 hours, transferred to room temperature at 20 ° C for 2 hours, the sensitivity changes within ± 3 dB
5.3 Humidity experiment
40 ° C and relative humidity 95 ± 29 when placed for 24 hours, transferred to room temperature 20 ° CC and relative humidity 60 ± 29 when stored for 2 hours, the sensitivity change within ± 3 dB
Place at -10 ° C for 30 minutes, 20 ° C for 10 minutes, 60 ° C for 30 minutes, 20 ° C for 10 minutes for 5 times, transfer to room temperature at 20 ° C for 2 hours, the sensitivity changes within ± 3 dB
6. Temperature conditions
6.1 Storage temperature: -10 ° C ~ +55 ° C
6.2 Operating temperature: +5 ° C ~ +55 ° C