GRAS风球AM0009适用于中国大陆41AM的挡风玻璃
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GRAS AM0009 Windscreen for 41AM/CN
Max.diameter x height: 70 x 120 mm
Material: Foam
GRAS AM0009适用于中国大陆41AM的挡风玻璃
大直径x高度：70 x 120 mm
材料：泡沫
Technology
Introduction
The GRAS AM0009 is a set of 5 windscreens.  The windscreen is included with the complete windscreens with birdspikes i.e. AM0145, AM0370, and AM0052 but can be replaced separatelly when worn out.
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.

Quality & Warranty
GRAS 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 consumables like batteries, cables and windscreen we offer a 6 month warranty.
技术介绍
GRAS AM0009是一套5块挡风玻璃。挡风玻璃包括带有鸟钉的完整挡风玻璃，即AM0145、AM0370和AM0052，但磨损时可以单独更换。
设计
当传声器置于层流中时，会产生湍流，从而导致隔膜产生不必要的压力变化。通过使用挡风玻璃，压力变化尽可能远离隔膜。
理论上这支持“越大越好的设计”，但在实践中，这是在空气速度降低、实际尺寸和自感噪声之间的折衷。自感噪声是当挡风玻璃开始围绕麦克风移动时产生的摇摆噪声。
GRAS挡风玻璃都是尺寸优化的，其特殊的开孔泡沫结构和每英寸的孔数（PPI）被设计成能够抵抗潮湿环境，同时不会显著影响声压测量结果。
质量和保修
GRAS配件由不锈钢、合金和复合材料制成。这些产品的预期用途保修期为2年。
对于电池、电缆和挡风玻璃等消耗品，我们提供6个月的保修。

Gras          46BP
Gras          46BH
Gras          40SC
Gras          46SA
Gras          26AB
Gras          26AN
Gras          46AR
Gras          26AC
Gras          26HG
Gras          26AS
Gras          26CK
Gras          26CB
Gras          26CG
Gras          26CC
Gras          26CS
Gras          41AC
Gras          40HF
Gras          40HH
Gras          AL0030
Gras          AA0079
Gras          46BL
Gras          46BD
Gras          46BE
Gras          OP0040
Gras          OP0041
Gras          OP0030
Gras          OP0031
Gras          OP0032
Gras          OP0050
Gras          OP0051
Gras          OP0070

Gras          44AA
Gras          44AB
Gras          OP0045
Gras          OP0046
Gras          43AH
Gras          43AI
Gras          AA0032
Gras          AA0033
Gras          AA0034
Gras          AA0035
Gras          AA0070
Gras          AA0073-CL
Gras          12AL
Gras          12AX
Gras          42AG
Gras          42AP
Gras          46BP-1
Gras          46DP-1
Gras          46BH-1
GRAS        AM0069
GRAS        AM0009
GRAS        AM0071
GRAS        AM0363
GRAS        AM0376
GRAS        AM0364
GRAS        AM0033
GRAS        AM0037
GRAS        AM0038
GRAS        AM0089
GRAS        AM0029
GRAS        AM0052