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GRAS風(fēng)球AM0009適用于中國(guó)大陸41AM的擋風(fēng)玻璃
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GRAS AM0009 Windscreen for 41AM/CN
Max.diameter x height: 70 x 120 mm
Material: Foam
GRAS AM0009適用于中國(guó)大陸41AM的擋風(fēng)玻璃
大直徑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.
技術(shù)介紹
GRAS AM0009是一套5塊擋風(fēng)玻璃。擋風(fēng)玻璃包括帶有鳥釘?shù)耐暾麚躏L(fēng)玻璃，即AM0145、AM0370和AM0052，但磨損時(shí)可以單獨(dú)更換。
設(shè)計(jì)
當(dāng)傳聲器置于層流中時(shí)，會(huì)產(chǎn)生湍流，從而導(dǎo)致隔膜產(chǎn)生不必要的壓力變化。通過(guò)使用擋風(fēng)玻璃，壓力變化盡可能遠(yuǎn)離隔膜。
理論上這支持“越大越好的設(shè)計(jì)”，但在實(shí)踐中，這是在空氣速度降低、實(shí)際尺寸和自感噪聲之間的折衷。自感噪聲是當(dāng)擋風(fēng)玻璃開始圍繞麥克風(fēng)移動(dòng)時(shí)產(chǎn)生的搖擺噪聲。
GRAS擋風(fēng)玻璃都是尺寸優(yōu)化的，其特殊的開孔泡沫結(jié)構(gòu)和每英寸的孔數(shù)（PPI）被設(shè)計(jì)成能夠抵抗潮濕環(huán)境，同時(shí)不會(huì)顯著影響聲壓測(cè)量結(jié)果。
質(zhì)量和保修
GRAS配件由不銹鋼、合金和復(fù)合材料制成。這些產(chǎn)品的預(yù)期用途保修期為2年。
對(duì)于電池、電纜和擋風(fēng)玻璃等消耗品，我們提供6個(gè)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