DEMSh, electromagnetic discriminating compact noise-resistant microphones are intended for communications equipment, working at temperatures ranging from - 60°С to + 60°С and elevated relative air humidity up to 98% at temperatures not higher than + 40°С.
Application areas
· general purpose telephone sets;
· communications and sound amplification equipment.
Technical specifications
| Rated frequency range, Hz | 200-4000 |
| Microphone's close-talking sensitivity at 1000 Hz frequency while operating with 600 Ohm load resistance within, not lower than, mV/Pa | |
| in normal climate environment | 0.3 |
| in elevated relative air humidity, diminished or elevated temperature environment | 0.2 |
| Output impedance at 1000 Hz frequency, Ohm | 400-1000 |
| Dimensions, mm | 30x23x10,8 |
| Mass, not more than, g | 14 |
| Acoustic asymmetry, not more than, % | 20 |
| Average lifetime, not lower than, h | 20000 |
| Warranty life, years | 6 |
You can order DEMSH-1A from us
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