MODEL: Vair-9020

Microphones for Outdoor Use 

Unprotected meaurements microphones are sensitive to environment factors such as wind, rain and snow. This shortcoming has been eliminated by specially  designed units that potect the microphone and its diaphragm from the effects of outdoor use. Each has a windscreen surmounted by four-pronged anti-bird spikes to prevent birds it as a perch.

Perching birds and their excreta can seriously distrot measurements or even overload the measurement equipment. Smaller birds have actually been know to nest on top of the earlier three-pronged anti-bird spikes. Hence, the introduction of the fourth, center prong.

VASTHI Vair-9020 series outdoor microphones are available in the following two vesions:

1. For airport noise monitoring, where the measurments direction points upwards (0° incidence).

2. For community noise- or traffic noise measurments, where the measurements direction is in the horizontal plane (90° incidence).

VASTHI Vair-9020 series Sound & Vibration has more than 1500 of these units deployed all over the world, from the arctic cold in Norway to the humid jungles of Malaysia .

41AM and 41CN

VASTHI  41 AM

Outdoor Microphone. 0° incidence

For permanent outdoor installation, for example in airport noise monitoring systems. Has built-in A-weighting, ±20 dB aplifier (for shifting the dynamic range up or down by 20 dB) and electrostatic actuator for complete check of system functionality.

vasthi 41AM is fitted with a Vasthi 41AS  ½" microphone for measurements at 0° incidence and is optimized for use with its windscreen and rain protection.

VASTHI  41 CN

Outdoor Microphone. 90° incidence

For permanent outdoor installation, for example in community noise- or traffic noise monitoring systems. Has built-in A weighting, ±20 dB amplifier (for shifting the dynamic range up or down by 20 dB) and electrostatic actuator for complete check of system functionality.

Vasthi 41CN is fitted with a special GRAS ½" microphone for measurements at 90° incidence and is optimized for use with its windscreen and rain protection.

Included:

• AM00052 windscreen incl. birdspike 
• AM00052 Transport protection cap 
• AM00038 Spanner 
• AM00029 Pole adapter 
• AM00033 Tripod adapter
• AE00001 LEMO plug 

Accessories available:

• AC0001 Adapter box
• RA0009 pistonphone adapter 41AM
• RA0041 Pistonphone adapter 41CN
• AM0009 set of 5 foaam windscreens 

Cables:

• AA0003 3 m 
• AA0002 10 m
• AA0015 100m on cable drum
• AA0016 200 m on cable drum 

41AC-2, and 41AC-3 & 41AC-4

VASTHI  41 AC

Outdoor Microphone Kit 

The 41 AC is a small and handy precision outdoor kit according to IEC 61672-1 and designed fr unattended use in prolonged periods.

41AC can easily be configured for measurement of noise with 90° of incidence, typically community noise, or - with the included correction data- for measurement of noise with 0° of incidence, typically overhead aircraft.

Depending on input type, 41AC is available in three versions.

VASTHI  41 CA

41 AC Configurations 

41 AC-2 LEMO Outdoor Microphone with Remote check for community & Airport Noise. With the features 7- pin LEMO connection and built-in Remote check technology that makes it possible to remotely check the measurement chain for changes.

41AC-3 CCP Outdoor Microphone for community & Airport Noise. With CCP connection and built-in TEDS for easy identification and system setup and Sys Check2 func-tionality for vastlly simplified calibrtion vertification.

41AC-4 LEMO Outdoor Microphone for community and Airport (0 V pol.) 41AC-4 uses a prepolarized microphone with a LEMO type premaplifier.

All three kits include tripod and pole - mount options and are delivered with individual calibration and correction data. Additional windscreen, AM0378, is available as a separate item .

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