The windscreen with birdspikes is mounted over the microphone and preamplifier.
The AM0145 is a complete windscreen with stainless steel birdspikes which prevent 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 G.R.A.S. 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.
If longer duration of outdoor monitoring is required, we suggest that you look for the G.R.A.S. permanent outdoor microphone solutions.
Note: The foam part can be purchased separatelly. See G.R.A.S. AM0009 (set of 5 pcs).
Quality & Warranty
G.R.A.S. accessories are made of stainless steel, alloys and high-quality composites. These items are covered by a 2 year warranty respecting their intended use.
On wear products like cables and windscreens, we offer a 6 month warranty.