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Mircophone DEMSH
DEMSH - is a small microphone with electromagnetic and differential characteristics. The principle of operation is to convert sound vibrations into electrical oscillations of sound frequency. It used as a general-purpose telephones and communications equipment and sound reinforcement. Thanks to its special construction can operate in tropical climates. The warranty period is 1 year, the calendar life of at least 5 years. It meets the requirements of IEC.
Structurally DEMSH microphone consists of:
- Ring magnet;
- windings;
- Flange with hollow pole pieces;
- membranes;
- Case.
Microphone DEMSH - it symmetric electromagnetic system with the diaphragm, which is open on both sides. This design is necessary to carry out the forced vibrations to the beat of the air pressure changes in the case of uneven sound pressure side of the membrane. Guarantees quality microphone output signal with a significant suppression of various kinds of noise.
Specifications:
- Dimensions - 30 x 23 x 10.8 mm;
- Weight - 14 g;
- Sensitivity at 1000 Hz - 0.4 - 1.25mV / Pa;
- Frequency range - 400 - 1000 Hz;
- Rated frequency range - 200-4000 Hz;
- The impedance at the frequency of 1000 Hz - 20 +/- 40 ohms;
- Module electrical impedance at the frequency of 1000 Hz - 400-1000 ohms.
- Relative humidity - 98%
- Working temperature - -60 + 60 ° C
- The uneven frequency response - no more than 13 dB.
- Acoustic asymmetry - does not exceed 20%
Available for order
Documentation:
IALA Maritime buoyage system
IALA (International Association of Maritime Aids to Navigation and Lighthouse Services) is a non-governmental organization established in 1957 to develop cooperation between lighthouse services of different countries, exchange information, provide them with technical and organizational assistance