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  • Type 41AM

    An outdoor microphone unit for permanent outdoor installations, for example in airport noise monitoring systems. The unit has a built-in A-weighting network, a ± 20 dB amplifier, and an electrostatic actuator for a complete che…

  • Type 41CN

    An outdoor microphone unit for permanent outdoor installations, for example in systems for monitoring community noise or traffic noise. The unit has a built-in A-weighting network, a ± 20 dB amplifier, and an electrostatic actu…