GRAS Accessories for Outdoor Microphones
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GRAS Sound & Vibration offers a wide range of standard accessories in the form of cables, adapters, windscreens and tripods for use in measuring set-ups.
GRAS Sound & Vibration offers a wide range of standard accessories in the form of cables, adapters, windscreens and tripods for use in measuring set-ups. These can be broadly split up under accessories for microphones, for preamplifiers, for outdoor microphones, for pistonphones and pinna simulators and accessories for ear simulators. Some are included with certain products, some are available as extras. All can be ordered individually. The brief descriptions given here as well as those on downloadable accessories sheet will help you to select what you need for your particular set-up. At all events, feel free to contact your GRAS partner if you need advice or further information.
GRAS Sound & Vibration also offers a wide range of special products and customised solutions. Our experience within the field of acoustics and vibration, combined with our short development time, enable us to provide innovative solutions to complex measurement problems in close co-operation with the customer. For a technical discussion of your measurement requirements, please contact your local representative or contact GRAS Sound & Vibration directly in Denmark.
GRAS AA0001 20 m LEMO 6-pin – LEMO 6-pin Cable for outdoor microphone
The GRAS AA0001 is a 20 m (65.6 feet) cable with LEMO 2S 6-pin connectors. The raw cable is a High-quality PUR cable with a double-screened signal wire. The cable is for GRAS 41AM/41CN Outdoor microphones.
GRAS AA0002 10 m LEMO 6-pin – LEMO 6-pin Cable for outdoor microphone
GRAS AA0003 3 m LEMO 6-pin – LEMO 6-pin Cable for outdoor microphone
GRAS AA0004 50 m LEMO 6-pin – LEMO 6-pin Cable for outdoor microphone
GRAS AA0015 100 m LEMO 6-pin – LEMO 6-pin Cable for outdoor microphone
GRAS AA0016 200 m LEMO 6-pin – LEMO 6-pin Cable for outdoor microphone
GRAS AA0086-CL Customized Length LEMO 6-pin – LEMO 6-pin Cable for outdoor microphone
GRAS AC0001 Calibration Control Box for 41AM/CN
GRAS AM0009 Windscreen for 41AM/CN
Design
When a microphone is placed in a laminar flow, turbulence is created which in turn results in unwanted pressure variations on the diaphragm. By using a windscreen the pressure variations are moved as far away from the diaphragm as possible.
Theoretically this supports a “the-bigger-the-better design”, but in practice it is a compromise between air speed reduction, practical size and self-induced noise. Self-induced noise is wobble-noise which is generated, when the windscreen starts moving around the microphone.
The GRAS windscreens are all size optimized and their special, open-cell foam structure and number of pores per inch2 (ppi), are designed to resist a humid environment and at the same time not influence the sound pressure measurement result significantly.
GRAS AM0029 Pole adapter
The GRAS AM0029 Pole adapter is used for mounting GRAS 41AM/41CN Outdoor Microphones and GRAS 41AL/41AO Environmental Microphones on a pole or tripod.
Compatibility
Towards the pole/tripod:
1) fits directly on pole with a 1 1/2″ RG (ISO 228/1) male thread.
2) fits on a 1/4″ UNC-20 male thread e.g. a GRAS tripod, with the SK0017 tripod thead insert mounted on the tripod + the GRAS AM0033 tripod adapter.
3) For mounting on a tripod of other brand with a 3/8″ UNC-16 male thread, you will need the AM0033 but not need the SK0017.
Towards the GRAS 41AM/41CN Outdoor microphone:
No additional product needed.
Towards the GRAS 41AL Environmental microphone:
GRAS AL0001 Desiccator needed.
Towards the GRAS 41AO Environmental microphone:
GRAS AL0014 Desiccator needed.
GRAS AM0033 Tripod adapter
For GRAS AM0033 is needed when mounting GRAS 41AM/41CN Outdoor microphones and GRAS Environmental microphones 41AL/41AO (fitted with Pole Adapter AM0029) on a tripod. Has 1 1/2″ RG (ISO 228/1) male thread on top and 3/8” UNC-16 female thread at the bottom
For mounting on a tripod with a 1/4″ UNC-20 male thread, e.g. the GRAS AL0006, you will also need the GRAS SK0017 tripod thread insert.
GRAS AM0037 Transport protection cap
The GRAS AM0037 is used for protecting the microphone assembly in Outdoor Microphones GRAS 41AM/41CN.
GRAS AM0038 Multi spanner/wrench
The GRAS AM0038 is a tool for dismantling the microphone assembly of Outdoor Microphones Type 41AM/41CN.
GRAS AM0052 Complete Windscreen for 41AM/CN
The windscreen is mounted over the microphone and preamplifier.
Design
The AM0052 is a complete windscreen with stainless steel birdspikes which prevents birds from landing on the windscreen.
When a microphone is placed in a laminar flow, turbulence is created which in turn results in unwanted pressure variations on the diaphragm. By using a windscreen the pressure variations are moved as far away from the diaphragm as possible.
Theoretically this supports a “the-bigger-the-better design”, but in practice it is a compromise between air speed reduction, practical size and self-induced noise. Self-induced noise is wobble-noise which is generated, when the windscreen starts moving around the microphone.
The GRAS windscreens are all size optimized and their special, open-cell foam structure and number of pores per inch2 (ppi), are designed to resist a humid environment and at the same time not influence the sound pressure measurement result significantly.
Note: The foam part can be purchased separatelly. See GRAS AM0009 (set of 5 pcs).
GRAS AM0089 Lownoise Windscreen for 41AM/CN
The AM0089 is a spherical windscreen specially designed and optimized for use with Type 41AO/AL/AM/1CN for sound pressure measurements under free-field conditions, e.g. in situations where the wind comes from more and unpredictable directions. The windscreen fits directly over the existing windscreen with bird spikes and gives additional wind protection.
Design
When a microphone is placed in a laminar flow, turbulence is created which in turn results in unwanted pressure variations on the diaphragm. By using a windscreen the pressure variations are moved as far away from the diaphragm as possible.
Theoretically this supports a “the-bigger-the-better design”, but in practice it is a compromise between air speed reduction, practical size and self-induced noise. Self-induced noise is wobble noise which is generated, when the windscreen starts moving around the microphone.
The GRAS windscreens are all size optimized and their special, open-cell foam structure and number of pores per inch2 (ppi), are designed to resist a humid environment and at the same time not influence the sound pressure measurement result significantly.
GRAS AM0378 Windscreen for 41AC
The AM0378 is a windscreen specially designed and optimized for use with GRAS 41AC Outdoor microphones for sound pressure measurements under free-field conditions, e.g. in situations where the wind comes from more and unpredictable directions. The windscreen is mounted over the top cone of the microphone. See the manual for the Outdoor microphone for instructions.
Design
When a microphone is placed in a laminar flow, turbulence is created which in turn results in unwanted pressure variations on the diaphragm. By using a windscreen the pressure variations are moved as far away from the diaphragm as possible.
Theoretically this supports a “the-bigger-the-better design”, but in practice it is a compromise between air speed reduction, practical size and self-induced noise. Self-induced noise is wobble-noise which is generated, when the windscreen starts moving around the microphone.
The GRAS windscreens are all size optimized and their special, open-cell foam structure and number of pores per inch2 (ppi), are designed to resist a humid environment and at the same time not influence the sound pressure measurement result significantly.
Frequency dependent attenuation is to be expected if the windscreen gets wet. Therefore windscreens are not intended as rain protection of the microphone.
The windscreen is easily removed during calibration of the microphone.
GRAS RA0009 Adapter for Pistonphone calibration
GRAS RA0041 Adapter for Pistonphone calibration
