Environmental microphones

Environmental microphones

The G.R.A.S. Environmental Microphones are equipped with four-pronged anti-bird spikes on top of the windscreen. This prevents birds from perching on top of the windscreen when the microphone unit is placed outdoors for long-term unattended noise surveillance. Birds perching on top of the windscreen can seriously disturb measurements or even overload the measurement equipment. Furthermore, bird excreta can distort the acoustic properties of the windscreen so that it no longer performs according to original specifications. Some smaller birds have actually been known to nest on top of the earlier three-pronged anti-bird spikes. Hence, the introduction of a fourth, centre prong.
  1. 41AC-2 LEMO Outdoor Microphone
    Standard: IEC 61672-1
    Special features:
    RemoteCheck
    Configurable for 90 or 0 degrees of incidence
    IP55 proof

    G.R.A.S. 41AC-2 LEMO Outdoor Microphone with RemoteCheck for Community and Airport Noise

    The 41AC-2 is an outdoor microphone for unattended use for prolonged periods of time. It can be used for community noise applications or for monitoring of overhead aircraft noise. It has RemoteCheck for monitoring of the mesurement chain. Learn More
  2. 41AC-3 CCP Outdoor Microphone
    Standard: IEC 61672-1
    TEDS
    Special features:
    Configurable for 90 or 0 degrees of incidence
    IP55 proof

    G.R.A.S. 41AC-3 CCP Outdoor Microphone for Community & Airport Noise

    The 41AC-3 is an outdoor microphone for unattended use for prolonged periods of time. It can be used for community noise applications or for monitoring of overhead aircraft noise. Learn More

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