GRAS麥克風(fēng)46BE設(shè)計(jì)理念GRAS風(fēng)球貨期快價(jià)格好
gras麥克風(fēng)46be設(shè)計(jì)理念gras風(fēng)球貨期快價(jià)格好
gras麥克風(fēng) gras風(fēng)球 gras放大器 gras模塊 gras前置器 gras廠(chǎng)家直銷(xiāo) gras代理
46be的設(shè)計(jì)理念：
--46be是一款高效率的用于測(cè)量高度聲量級(jí)和高頻段音頻的麥克風(fēng)套裝，其被設(shè)計(jì)可長(zhǎng)時(shí)間穩(wěn)定用于復(fù)雜多元環(huán)境下。
--46be的預(yù)偏振是通過(guò)一個(gè)在嚴(yán)格控制條件下負(fù)荷于麥克風(fēng)底板的電介體還獲得，然后電介體會(huì)充電以匹配特定的麥克風(fēng)感音性。
--46be的自帶前置放大器是配備microdot連接器的標(biāo)準(zhǔn)前置放大器26cb，其是基于gras著名的電路板底座而設(shè)計(jì)的。gras電路板以其低自噪，寬頻率以及超高轉(zhuǎn)換速率而聞名業(yè)內(nèi)。
機(jī)遇，抓住了就會(huì)成功，錯(cuò)過(guò)了就會(huì)失敗。書(shū)籍，學(xué)習(xí)就是知識(shí)，沒(méi)看就是廢紙。理想，努力了叫夢(mèng)想，放棄了只是妄想。努力，雖然未必會(huì)有收獲，但放棄就一定一無(wú)所獲。再好的機(jī)會(huì)，也要靠人把握，放手去做
為了執(zhí)行指定的gras 46be麥克風(fēng)設(shè)置需要一個(gè)恒定電流輸入模塊，可以提供4毫安和24 v卸載ccp電壓供應(yīng)。如果恒流源較低，則驅(qū)動(dòng)長(zhǎng)電纜的能力降低，從而降低了上行頻率。如果電源電壓較低，將影響上動(dòng)態(tài)范圍。
麥克風(fēng)組用10/32 unc微型女性連接器終止。各種規(guī)格和長(zhǎng)度的同軸電纜組件可用于標(biāo)準(zhǔn)和定制長(zhǎng)度。
46be是ieee 1451.4 teds v 1兼容。如果您的測(cè)量平臺(tái)支持換能器電子數(shù)據(jù)表，您將能夠讀取和寫(xiě)入數(shù)據(jù)，如屬性和校準(zhǔn)數(shù)據(jù)。
系統(tǒng)驗(yàn)證
teds的功能對(duì)于確定哪一個(gè)麥克風(fēng)連接到哪個(gè)輸入通道是非常有用的。然而，它不是檢查麥克風(fēng)是否在規(guī)格之內(nèi)。為了日常驗(yàn)證和檢查您的測(cè)量設(shè)置，因此我們建議使用像gras 42ag聲音校準(zhǔn)器這樣的聲源。
對(duì)于適當(dāng)?shù)撵`敏度校準(zhǔn)，我們建議使用參考聲源，如gras 42ap智能活塞式電話(huà)。
校準(zhǔn)
當(dāng)離開(kāi)工廠(chǎng)時(shí)，所有的gras麥克風(fēng)已經(jīng)在可控的實(shí)驗(yàn)室環(huán)境中使用可追溯的校準(zhǔn)設(shè)備進(jìn)行了校準(zhǔn)。根據(jù)使用、測(cè)量環(huán)境和內(nèi)部質(zhì)量控制程序，我們建議麥克風(fēng)每年至少重新校準(zhǔn)一次。
我們提供兩種校準(zhǔn)作為一種可選的售后服務(wù)：gras溯源校準(zhǔn)和gras認(rèn)證校準(zhǔn)。
gras可追溯校準(zhǔn)是由受過(guò)訓(xùn)練的人員根據(jù)既定的程序和標(biāo)準(zhǔn)在控制條件下進(jìn)行的可追溯校準(zhǔn)。這與嚴(yán)格的校準(zhǔn)是一樣的，所有的gras麥克風(fēng)都作為我們質(zhì)量保證的組成部分。
gras認(rèn)證校準(zhǔn)由gras認(rèn)證校準(zhǔn)實(shí)驗(yàn)室執(zhí)行，該實(shí)驗(yàn)室已根據(jù)iso 17025由丹麥認(rèn)證基金danak認(rèn)證。
如果您想要一個(gè)新的麥克風(fēng)組交付的認(rèn)證校準(zhǔn)代替默認(rèn)的工廠(chǎng)校準(zhǔn)，指定訂購(gòu)時(shí)。
在gras／calb學(xué)習(xí)更多。
質(zhì)量與保證
gras麥克風(fēng)組由我們經(jīng)過(guò)驗(yàn)證的標(biāo)準(zhǔn)組合的組件組成，并且全部由高質(zhì)量的材料和品牌部件制造，這些部件被選擇和加工以確保終身穩(wěn)定性和魯棒性。
所有零件都是在丹麥的工廠(chǎng)由熟練和專(zhuān)業(yè)的操作人員在一個(gè)經(jīng)過(guò)驗(yàn)證的潔凈室環(huán)境中生產(chǎn)和組裝的。麥克風(fēng)膜片、主體和獨(dú)特的保護(hù)柵格由不銹鋼制成，使麥克風(fēng)組能夠抵抗物理?yè)p傷以及由腐蝕性空氣或氣體引起的腐蝕。
這一點(diǎn)，加上強(qiáng)制鍍金麥克風(fēng)終端保證了高度可靠的連接。由于質(zhì)量好，我們對(duì)有缺陷的材料和工藝的保修期為5年。
服務(wù)
如果你們錯(cuò)誤地?fù)p壞了gras麥克風(fēng)上的光圈，在大多數(shù)情況下，我們能夠以非常合理的成本和短的周轉(zhuǎn)時(shí)間來(lái)更換它。這不僅可以保護(hù)您的投資，而且可以滿(mǎn)足您的質(zhì)量保證部門(mén)，因?yàn)槟槐負(fù)?dān)心新的序列號(hào)等。
gras 46be典型應(yīng)用與使用
46be是一個(gè)自由場(chǎng)麥克風(fēng)組，這樣就優(yōu)化了所有聲學(xué)應(yīng)用，其中主聲源的位置是已知的，麥克風(fēng)可以直接指向它，確保0°入射。然而，應(yīng)該注意的是，1/4“麥克風(fēng)主體和隔膜的小尺寸也使得壓力和隨機(jī)入射（擴(kuò)散場(chǎng)）測(cè)量到20 khz，而不去除保護(hù)柵極或需要進(jìn)一步補(bǔ)償。如果你不能指出你的聲場(chǎng)的性質(zhì)，這個(gè)有用的特性是非常有用的。
高截止頻率使得它適合于超聲診斷和脈沖測(cè)量，其中小失真和高分辨率是通過(guò)膜片的小尺寸和快速響應(yīng)獲得的。
關(guān)于溫度范圍，請(qǐng)參閱說(shuō)明書(shū)。如果需要更高的溫度限制，我們建議考慮gras探頭麥克風(fēng)，麥克風(fēng)和前置放大器可以與熱源隔離。
gras 46be設(shè)計(jì)
gras 46be是一種高性能的1/4“自由場(chǎng)標(biāo)準(zhǔn)麥克風(fēng)，用于測(cè)量高頻下的高聲壓水平。在我們的潔凈室環(huán)境中，用一個(gè)標(biāo)簽組裝和密封。但是，如果您希望單獨(dú)使用這些組件，可以拆卸麥克風(fēng)組。
gras 46be話(huà)筒
麥克風(fēng)盒是高質(zhì)量的iec 61094 ws3f標(biāo)準(zhǔn)gras 40be 1/4“預(yù)極化自由場(chǎng)麥克風(fēng)，設(shè)計(jì)用于多種環(huán)境中的長(zhǎng)期可靠性。
預(yù)極化是通過(guò)駐極體獲得的，駐極體在高度受控的條件下施加在麥克風(fēng)背板上。然后，駐極體充電以匹配指定的麥克風(fēng)靈敏度。
introduction
through a close cooperation with our customers, we know that data-safety is highly important because the costs related to unsuited and unreliable sensors may determine whether your project turns into a success or not.
for our users, data safety translates directly into requests for easier microphone selection, simple system configuration and reduction of measurement errors.
to meet these requirements, we invented the microphone set concept. it is simple, reliable and robust and consists of a microphone cartridge and preamplifier combination, which is calibrated as one unit. this eliminates errors because there is only one sensitivity value to account for and the risk of contaminating the interface is eliminated. combine this with our unique and proven design and you have the most reliable measurement microphone sets available in the industry today.
typical applications and use
the 46be is a free-field microphone set and as such optimized for all acoustic applications, where the location of the main sound source is known and the microphone can be pointed directly at it ensuring 0° incidence. however it should be noted that the small size of the 1/4 microphone body and diaphragm also enables pressure and random-incidence (diffuse field) measurements up to 20 khz without removing the protection grid or need for further compensation. this all-use feature is very useful if you are not able to point out the nature of your sound field.)
the high cut-off frequency makes it ideal for ultra-sonic diagnostics and impulse measurements, where minimum distortion and high resolution are obtained by the small size and fast response of the diaphragm.
regarding temperature range, see the specifications. should higher temperature limits be required, we recommend considering the gras probe microphones where the microphone and preamplifier can be isolated from the hot source.
design
the gras 46be is a high-performance 1/4 free-field standard microphone set for measuring high sound pressure levels at high frequencies. in our clean-room environment the set is assembled and sealed with a label. however, the microphone set can be dismounted, if you wish to use the components separately.
microphone
the microphone cartridge is the high-quality iec 61094 ws3f standardized gras 40be 1/4 prepolarized free-field microphone, designed for long-term reliability in multiple environments.
the prepolarization is obtained through an electret that is inflicted on the microphone back-plate under highly controlled conditions. the electret is then charged to match the specified microphone sensitivity.
preamplifier
the preamplifier is the gras 26cb 1/4 ccp standard preamplifier with microdot connector, and based on our well-known circuit board substrates. in the industry these are famous for their low self-noise, wide frequency and excellent slew rate performance.
compatibility
to perform as specified the gras 46be microphone set requires a constant current input module that can deliver 4 ma and 24 v unloaded ccp voltage supply. if the constant current supply is lower, the capability of driving long cables is reduced and consequently the upper frequency is reduced. if the voltage supply is lower it will influence the upper dynamic range.
the microphone set is terminated with a 10/32 unc microdot female connector. ready to use coax cable assemblies of various types and lengths are available in standard as well as customized lengths.
the 46be is ieee 1451.4 teds v. 1.0 compliant. if your measurement platform supports transducer electronic data sheets you will be able to read and write data like properties and calibration data.
system verification
the functionality of teds is very useful to determine which microphone is connected to which input channel. however, it is not a check of whether the microphone is within specifications or not. for daily verification and check of your measurement setup, we therefore recommend using a sound source like the gras 42ag sound calibrator.
for proper sensitivity calibration we recommend using a reference sound source like the gras 42ap intelligent pistonphone.
calibration
when leaving the factory, all gras microphones have been calibrated in a controlled laboratory environment using traceable calibration equipment. depending on the use, measurement environment and internal quality control programs we recommend that the microphone is recalibrated at least once a year.
we offer two kinds of calibration as an optional after-sales service: gras traceable calibration and gras accredited calibration.
gras traceable calibration is a traceable calibration performed by trained personnel under controlled conditions according to established procedures and standards. this is identical to the rigorous calibration that all gras microphones are subjected to as an integral part of our quality assurance.
gras accredited calibration is performed by the gras accredited calibration laboratory that has been accredited in accordance with iso 17025 by danak, the danish accreditation fund.
if you want a new microphone set delivered with an accredited calibration in stead of the default factory calibration, specify this when ordering.
learn more at gras/calib.
quality and warranty
gras microphone sets are made of components from our proven standard portfolio and are all manufactured of high-quality material and branded parts that were chosen and processed to ensure life-long stability and robustness.
all parts are manufactured and assembled at the factory in denmark by skilled and dedicated operators in a verified clean-room environment. the microphone diaphragm, body and unique protection grid are made of high-grade stainless steel and make the microphone set resistant to physical damage as well as corrosion caused by aggressive air or gasses.
this, together with the enforced gold-plated microphone terminal guarantees a highly reliable connection. thanks to the high quality, our warranty against defective materials and workmanship is 5 years.
service
should you by mistake damage the diaphragm on a gras microphone we will in most cases be able to exchange it at a very reasonable cost and short turn-around time. this not only protects your investment but also meets your quality assurance department since you do not have to worry about new serial numbers etc.
gras 46be前置放大器
前置放大器是gras 26cb 1/4“ccp標(biāo)準(zhǔn)前置放大器與微連接器，并基于我們眾所周知的電路板基板。在工業(yè)中，它們以其低自噪聲、寬頻率和優(yōu)良的轉(zhuǎn)換速率性能而聞名。
gras 46be 1/4 ccp free-field standard microphone set
測(cè)量麥克風(fēng)組
測(cè)量麥克風(fēng)集已經(jīng)結(jié)合起來(lái)，所以它們滿(mǎn)足了用戶(hù)的典型測(cè)量需求。獨(dú)立于您的測(cè)量系統(tǒng)和應(yīng)用程序，您應(yīng)該能夠找到一套適合您的需求。麥克風(fēng)設(shè)置可以直接連接到所有專(zhuān)業(yè)的測(cè)量系統(tǒng)，如可供中國(guó)共產(chǎn)黨和7雷莫輸入。
如果你的測(cè)量平臺(tái)支持智能傳感器根據(jù)ieee 1451.4（teds）你可以簡(jiǎn)單地插入麥克風(fēng)，他們會(huì)認(rèn)同他們的特性、類(lèi)型和校準(zhǔn)數(shù)據(jù)。多頻道用戶(hù)特別欣賞的特性。
gras麥克風(fēng)套裝46be概述：
通過(guò)與客戶(hù)的密切合作,gras明白數(shù)據(jù)安全是非常重要的,因?yàn)樵诓缓线m的和不可靠的傳感器上投入的成本可能會(huì)決定你的項(xiàng)目結(jié)果導(dǎo)向是成功與否。對(duì)于用戶(hù)來(lái)說(shuō),數(shù)據(jù)安全要求更簡(jiǎn)約的麥克風(fēng)選擇,更簡(jiǎn)單的系統(tǒng)配置,更稀少的測(cè)量誤差。為滿(mǎn)足這些需求,gras發(fā)明了麥克風(fēng)套裝的概念。這是一個(gè)簡(jiǎn)約，可靠又耐用的整合了麥克風(fēng)和前置放大器的產(chǎn)品概念，由于這種設(shè)計(jì)理念使得只有一個(gè)感應(yīng)數(shù)值需要計(jì)算同時(shí)避免了接口處的污染，所以幾乎杜絕了測(cè)量誤差。gras通過(guò)將獨(dú)到且經(jīng)認(rèn)證的設(shè)計(jì)理念有機(jī)結(jié)合，為用戶(hù)提供了最為可靠且實(shí)用的測(cè)音麥克風(fēng)綜合套組。
--46be是一款為聲學(xué)應(yīng)用而設(shè)計(jì)的自由場(chǎng)麥克風(fēng)套裝，當(dāng)聲源位置已知時(shí)，46be可以以其確保的0°入射角直接指向測(cè)量音源。
--46be在不移除防護(hù)欄且無(wú)需進(jìn)一步校準(zhǔn)補(bǔ)償?shù)那闆r下，其1/4極小尺寸任然可以確保壓力及無(wú)規(guī)律入射（擴(kuò)散聲場(chǎng)）的測(cè)量閾值高達(dá)20khz。
--46be的這種全方位、多功能測(cè)量范圍使得用戶(hù)在不能確定聲場(chǎng)屬性的時(shí)候顯得極為有用。
--46be的高截止頻率使得它是一款理想的超聲波診斷和脈沖測(cè)量?jī)x，同時(shí)其小巧的尺寸和快反應(yīng)振膜也確保了極小失真率和極高分辨率。
46be的校準(zhǔn)標(biāo)準(zhǔn)：
--出廠(chǎng)時(shí)，所有g(shù)ras麥克風(fēng)都已經(jīng)過(guò)受控實(shí)驗(yàn)室環(huán)境中使用的可溯源校準(zhǔn)設(shè)備的調(diào)試與校準(zhǔn)。根據(jù)使用情況，測(cè)量環(huán)境以及內(nèi)部質(zhì)量控制計(jì)劃，gras建議麥克風(fēng)應(yīng)至少每年校準(zhǔn)一次。
gras提供了兩種校準(zhǔn)作為可選的售后服務(wù)：gras可追蹤校準(zhǔn)和gras認(rèn)證校準(zhǔn)
gras可追溯校準(zhǔn)是由受過(guò)培訓(xùn)的人員在受控條件下根據(jù)既定程序和標(biāo)準(zhǔn)進(jìn)行的可追溯校準(zhǔn)，這與所有g(shù)ras麥克風(fēng)作為質(zhì)量保證的一個(gè)組成部分進(jìn)行的嚴(yán)格校準(zhǔn)相同。
gras認(rèn)證校準(zhǔn)由gras認(rèn)證校準(zhǔn)實(shí)驗(yàn)室執(zhí)行，該實(shí)驗(yàn)室已通過(guò)丹麥認(rèn)證基金danak的iso 17025認(rèn)證。
丹麥g.r.a.s（gras麥克風(fēng)）應(yīng)用范圍：
--gras測(cè)量麥克風(fēng)可以在多種頻率范圍、動(dòng)態(tài)范圍和不同的應(yīng)用場(chǎng)合下使用。
要選擇適合您的具體測(cè)量需要的麥克風(fēng)，您的考慮很可能被概括為:
--自由場(chǎng)、壓力場(chǎng)或隨機(jī)事件。
--動(dòng)態(tài)范圍和頻率范圍。
電容話(huà)筒的輸出是一個(gè)非常高的阻抗信號(hào)，因此對(duì)電纜的電容負(fù)載非常敏感。這使得需要引入高輸入阻抗和低輸出阻抗的驅(qū)動(dòng)。這樣的驅(qū)動(dòng)器稱(chēng)為前置放大器。
前置放大器的頻率范圍是由它的電子電路決定的，通常在高端有200 khz，下端為1- 10hz。下端由前置放大器的輸入阻抗和麥克風(fēng)的電容決定。高傳聲器電容提供低截止頻率。
前置放大器的動(dòng)態(tài)范圍被定義為前置放大器能處理的最高電平之間的距離，并且是可以測(cè)量的最低水平。極高水平與前置放大器的電源電壓有關(guān)，而最低電平與前置放大器本身產(chǎn)生的電噪聲有關(guān)。
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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
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gras麥克風(fēng) gras風(fēng)球 gras放大器 gras模塊 gras前置器 gras廠(chǎng)家直銷(xiāo) gras代理
46be的設(shè)計(jì)理念：
--46be是一款高效率的用于測(cè)量高度聲量級(jí)和高頻段音頻的麥克風(fēng)套裝，其被設(shè)計(jì)可長(zhǎng)時(shí)間穩(wěn)定用于復(fù)雜多元環(huán)境下。
--46be的預(yù)偏振是通過(guò)一個(gè)在嚴(yán)格控制條件下負(fù)荷于麥克風(fēng)底板的電介體還獲得，然后電介體會(huì)充電以匹配特定的麥克風(fēng)感音性。
--46be的自帶前置放大器是配備microdot連接器的標(biāo)準(zhǔn)前置放大器26cb，其是基于gras著名的電路板底座而設(shè)計(jì)的。gras電路板以其低自噪，寬頻率以及超高轉(zhuǎn)換速率而聞名業(yè)內(nèi)。
機(jī)遇，抓住了就會(huì)成功，錯(cuò)過(guò)了就會(huì)失敗。書(shū)籍，學(xué)習(xí)就是知識(shí)，沒(méi)看就是廢紙。理想，努力了叫夢(mèng)想，放棄了只是妄想。努力，雖然未必會(huì)有收獲，但放棄就一定一無(wú)所獲。再好的機(jī)會(huì)，也要靠人把握，放手去做
為了執(zhí)行指定的gras 46be麥克風(fēng)設(shè)置需要一個(gè)恒定電流輸入模塊，可以提供4毫安和24 v卸載ccp電壓供應(yīng)。如果恒流源較低，則驅(qū)動(dòng)長(zhǎng)電纜的能力降低，從而降低了上行頻率。如果電源電壓較低，將影響上動(dòng)態(tài)范圍。
麥克風(fēng)組用10/32 unc微型女性連接器終止。各種規(guī)格和長(zhǎng)度的同軸電纜組件可用于標(biāo)準(zhǔn)和定制長(zhǎng)度。
46be是ieee 1451.4 teds v 1兼容。如果您的測(cè)量平臺(tái)支持換能器電子數(shù)據(jù)表，您將能夠讀取和寫(xiě)入數(shù)據(jù)，如屬性和校準(zhǔn)數(shù)據(jù)。
系統(tǒng)驗(yàn)證
teds的功能對(duì)于確定哪一個(gè)麥克風(fēng)連接到哪個(gè)輸入通道是非常有用的。然而，它不是檢查麥克風(fēng)是否在規(guī)格之內(nèi)。為了日常驗(yàn)證和檢查您的測(cè)量設(shè)置，因此我們建議使用像gras 42ag聲音校準(zhǔn)器這樣的聲源。
對(duì)于適當(dāng)?shù)撵`敏度校準(zhǔn)，我們建議使用參考聲源，如gras 42ap智能活塞式電話(huà)。
校準(zhǔn)
當(dāng)離開(kāi)工廠(chǎng)時(shí)，所有的gras麥克風(fēng)已經(jīng)在可控的實(shí)驗(yàn)室環(huán)境中使用可追溯的校準(zhǔn)設(shè)備進(jìn)行了校準(zhǔn)。根據(jù)使用、測(cè)量環(huán)境和內(nèi)部質(zhì)量控制程序，我們建議麥克風(fēng)每年至少重新校準(zhǔn)一次。
我們提供兩種校準(zhǔn)作為一種可選的售后服務(wù)：gras溯源校準(zhǔn)和gras認(rèn)證校準(zhǔn)。
gras可追溯校準(zhǔn)是由受過(guò)訓(xùn)練的人員根據(jù)既定的程序和標(biāo)準(zhǔn)在控制條件下進(jìn)行的可追溯校準(zhǔn)。這與嚴(yán)格的校準(zhǔn)是一樣的，所有的gras麥克風(fēng)都作為我們質(zhì)量保證的組成部分。
gras認(rèn)證校準(zhǔn)由gras認(rèn)證校準(zhǔn)實(shí)驗(yàn)室執(zhí)行，該實(shí)驗(yàn)室已根據(jù)iso 17025由丹麥認(rèn)證基金danak認(rèn)證。
如果您想要一個(gè)新的麥克風(fēng)組交付的認(rèn)證校準(zhǔn)代替默認(rèn)的工廠(chǎng)校準(zhǔn)，指定訂購(gòu)時(shí)。
在gras／calb學(xué)習(xí)更多。
質(zhì)量與保證
gras麥克風(fēng)組由我們經(jīng)過(guò)驗(yàn)證的標(biāo)準(zhǔn)組合的組件組成，并且全部由高質(zhì)量的材料和品牌部件制造，這些部件被選擇和加工以確保終身穩(wěn)定性和魯棒性。
所有零件都是在丹麥的工廠(chǎng)由熟練和專(zhuān)業(yè)的操作人員在一個(gè)經(jīng)過(guò)驗(yàn)證的潔凈室環(huán)境中生產(chǎn)和組裝的。麥克風(fēng)膜片、主體和獨(dú)特的保護(hù)柵格由不銹鋼制成，使麥克風(fēng)組能夠抵抗物理?yè)p傷以及由腐蝕性空氣或氣體引起的腐蝕。
這一點(diǎn)，加上強(qiáng)制鍍金麥克風(fēng)終端保證了高度可靠的連接。由于質(zhì)量好，我們對(duì)有缺陷的材料和工藝的保修期為5年。
服務(wù)
如果你們錯(cuò)誤地?fù)p壞了gras麥克風(fēng)上的光圈，在大多數(shù)情況下，我們能夠以非常合理的成本和短的周轉(zhuǎn)時(shí)間來(lái)更換它。這不僅可以保護(hù)您的投資，而且可以滿(mǎn)足您的質(zhì)量保證部門(mén)，因?yàn)槟槐負(fù)?dān)心新的序列號(hào)等。
gras 46be典型應(yīng)用與使用
46be是一個(gè)自由場(chǎng)麥克風(fēng)組，這樣就優(yōu)化了所有聲學(xué)應(yīng)用，其中主聲源的位置是已知的，麥克風(fēng)可以直接指向它，確保0°入射。然而，應(yīng)該注意的是，1/4“麥克風(fēng)主體和隔膜的小尺寸也使得壓力和隨機(jī)入射（擴(kuò)散場(chǎng)）測(cè)量到20 khz，而不去除保護(hù)柵極或需要進(jìn)一步補(bǔ)償。如果你不能指出你的聲場(chǎng)的性質(zhì)，這個(gè)有用的特性是非常有用的。
高截止頻率使得它適合于超聲診斷和脈沖測(cè)量，其中小失真和高分辨率是通過(guò)膜片的小尺寸和快速響應(yīng)獲得的。
關(guān)于溫度范圍，請(qǐng)參閱說(shuō)明書(shū)。如果需要更高的溫度限制，我們建議考慮gras探頭麥克風(fēng)，麥克風(fēng)和前置放大器可以與熱源隔離。
gras 46be設(shè)計(jì)
gras 46be是一種高性能的1/4“自由場(chǎng)標(biāo)準(zhǔn)麥克風(fēng)，用于測(cè)量高頻下的高聲壓水平。在我們的潔凈室環(huán)境中，用一個(gè)標(biāo)簽組裝和密封。但是，如果您希望單獨(dú)使用這些組件，可以拆卸麥克風(fēng)組。
gras 46be話(huà)筒
麥克風(fēng)盒是高質(zhì)量的iec 61094 ws3f標(biāo)準(zhǔn)gras 40be 1/4“預(yù)極化自由場(chǎng)麥克風(fēng)，設(shè)計(jì)用于多種環(huán)境中的長(zhǎng)期可靠性。
預(yù)極化是通過(guò)駐極體獲得的，駐極體在高度受控的條件下施加在麥克風(fēng)背板上。然后，駐極體充電以匹配指定的麥克風(fēng)靈敏度。
introduction
through a close cooperation with our customers, we know that data-safety is highly important because the costs related to unsuited and unreliable sensors may determine whether your project turns into a success or not.
for our users, data safety translates directly into requests for easier microphone selection, simple system configuration and reduction of measurement errors.
to meet these requirements, we invented the microphone set concept. it is simple, reliable and robust and consists of a microphone cartridge and preamplifier combination, which is calibrated as one unit. this eliminates errors because there is only one sensitivity value to account for and the risk of contaminating the interface is eliminated. combine this with our unique and proven design and you have the most reliable measurement microphone sets available in the industry today.
typical applications and use
the 46be is a free-field microphone set and as such optimized for all acoustic applications, where the location of the main sound source is known and the microphone can be pointed directly at it ensuring 0° incidence. however it should be noted that the small size of the 1/4 microphone body and diaphragm also enables pressure and random-incidence (diffuse field) measurements up to 20 khz without removing the protection grid or need for further compensation. this all-use feature is very useful if you are not able to point out the nature of your sound field.)
the high cut-off frequency makes it ideal for ultra-sonic diagnostics and impulse measurements, where minimum distortion and high resolution are obtained by the small size and fast response of the diaphragm.
regarding temperature range, see the specifications. should higher temperature limits be required, we recommend considering the gras probe microphones where the microphone and preamplifier can be isolated from the hot source.
design
the gras 46be is a high-performance 1/4 free-field standard microphone set for measuring high sound pressure levels at high frequencies. in our clean-room environment the set is assembled and sealed with a label. however, the microphone set can be dismounted, if you wish to use the components separately.
microphone
the microphone cartridge is the high-quality iec 61094 ws3f standardized gras 40be 1/4 prepolarized free-field microphone, designed for long-term reliability in multiple environments.
the prepolarization is obtained through an electret that is inflicted on the microphone back-plate under highly controlled conditions. the electret is then charged to match the specified microphone sensitivity.
preamplifier
the preamplifier is the gras 26cb 1/4 ccp standard preamplifier with microdot connector, and based on our well-known circuit board substrates. in the industry these are famous for their low self-noise, wide frequency and excellent slew rate performance.
compatibility
to perform as specified the gras 46be microphone set requires a constant current input module that can deliver 4 ma and 24 v unloaded ccp voltage supply. if the constant current supply is lower, the capability of driving long cables is reduced and consequently the upper frequency is reduced. if the voltage supply is lower it will influence the upper dynamic range.
the microphone set is terminated with a 10/32 unc microdot female connector. ready to use coax cable assemblies of various types and lengths are available in standard as well as customized lengths.
the 46be is ieee 1451.4 teds v. 1.0 compliant. if your measurement platform supports transducer electronic data sheets you will be able to read and write data like properties and calibration data.
system verification
the functionality of teds is very useful to determine which microphone is connected to which input channel. however, it is not a check of whether the microphone is within specifications or not. for daily verification and check of your measurement setup, we therefore recommend using a sound source like the gras 42ag sound calibrator.
for proper sensitivity calibration we recommend using a reference sound source like the gras 42ap intelligent pistonphone.
calibration
when leaving the factory, all gras microphones have been calibrated in a controlled laboratory environment using traceable calibration equipment. depending on the use, measurement environment and internal quality control programs we recommend that the microphone is recalibrated at least once a year.
we offer two kinds of calibration as an optional after-sales service: gras traceable calibration and gras accredited calibration.
gras traceable calibration is a traceable calibration performed by trained personnel under controlled conditions according to established procedures and standards. this is identical to the rigorous calibration that all gras microphones are subjected to as an integral part of our quality assurance.
gras accredited calibration is performed by the gras accredited calibration laboratory that has been accredited in accordance with iso 17025 by danak, the danish accreditation fund.
if you want a new microphone set delivered with an accredited calibration in stead of the default factory calibration, specify this when ordering.
learn more at gras/calib.
quality and warranty
gras microphone sets are made of components from our proven standard portfolio and are all manufactured of high-quality material and branded parts that were chosen and processed to ensure life-long stability and robustness.
all parts are manufactured and assembled at the factory in denmark by skilled and dedicated operators in a verified clean-room environment. the microphone diaphragm, body and unique protection grid are made of high-grade stainless steel and make the microphone set resistant to physical damage as well as corrosion caused by aggressive air or gasses.
this, together with the enforced gold-plated microphone terminal guarantees a highly reliable connection. thanks to the high quality, our warranty against defective materials and workmanship is 5 years.
service
should you by mistake damage the diaphragm on a gras microphone we will in most cases be able to exchange it at a very reasonable cost and short turn-around time. this not only protects your investment but also meets your quality assurance department since you do not have to worry about new serial numbers etc.
gras 46be前置放大器
前置放大器是gras 26cb 1/4“ccp標(biāo)準(zhǔn)前置放大器與微連接器，并基于我們眾所周知的電路板基板。在工業(yè)中，它們以其低自噪聲、寬頻率和優(yōu)良的轉(zhuǎn)換速率性能而聞名。
gras 46be 1/4 ccp free-field standard microphone set
測(cè)量麥克風(fēng)組
測(cè)量麥克風(fēng)集已經(jīng)結(jié)合起來(lái)，所以它們滿(mǎn)足了用戶(hù)的典型測(cè)量需求。獨(dú)立于您的測(cè)量系統(tǒng)和應(yīng)用程序，您應(yīng)該能夠找到一套適合您的需求。麥克風(fēng)設(shè)置可以直接連接到所有專(zhuān)業(yè)的測(cè)量系統(tǒng)，如可供中國(guó)共產(chǎn)黨和7雷莫輸入。
如果你的測(cè)量平臺(tái)支持智能傳感器根據(jù)ieee 1451.4（teds）你可以簡(jiǎn)單地插入麥克風(fēng)，他們會(huì)認(rèn)同他們的特性、類(lèi)型和校準(zhǔn)數(shù)據(jù)。多頻道用戶(hù)特別欣賞的特性。
gras麥克風(fēng)套裝46be概述：
通過(guò)與客戶(hù)的密切合作,gras明白數(shù)據(jù)安全是非常重要的,因?yàn)樵诓缓线m的和不可靠的傳感器上投入的成本可能會(huì)決定你的項(xiàng)目結(jié)果導(dǎo)向是成功與否。對(duì)于用戶(hù)來(lái)說(shuō),數(shù)據(jù)安全要求更簡(jiǎn)約的麥克風(fēng)選擇,更簡(jiǎn)單的系統(tǒng)配置,更稀少的測(cè)量誤差。為滿(mǎn)足這些需求,gras發(fā)明了麥克風(fēng)套裝的概念。這是一個(gè)簡(jiǎn)約，可靠又耐用的整合了麥克風(fēng)和前置放大器的產(chǎn)品概念，由于這種設(shè)計(jì)理念使得只有一個(gè)感應(yīng)數(shù)值需要計(jì)算同時(shí)避免了接口處的污染，所以幾乎杜絕了測(cè)量誤差。gras通過(guò)將獨(dú)到且經(jīng)認(rèn)證的設(shè)計(jì)理念有機(jī)結(jié)合，為用戶(hù)提供了最為可靠且實(shí)用的測(cè)音麥克風(fēng)綜合套組。
--46be是一款為聲學(xué)應(yīng)用而設(shè)計(jì)的自由場(chǎng)麥克風(fēng)套裝，當(dāng)聲源位置已知時(shí)，46be可以以其確保的0°入射角直接指向測(cè)量音源。
--46be在不移除防護(hù)欄且無(wú)需進(jìn)一步校準(zhǔn)補(bǔ)償?shù)那闆r下，其1/4極小尺寸任然可以確保壓力及無(wú)規(guī)律入射（擴(kuò)散聲場(chǎng)）的測(cè)量閾值高達(dá)20khz。
--46be的這種全方位、多功能測(cè)量范圍使得用戶(hù)在不能確定聲場(chǎng)屬性的時(shí)候顯得極為有用。
--46be的高截止頻率使得它是一款理想的超聲波診斷和脈沖測(cè)量?jī)x，同時(shí)其小巧的尺寸和快反應(yīng)振膜也確保了極小失真率和極高分辨率。
46be的校準(zhǔn)標(biāo)準(zhǔn)：
--出廠(chǎng)時(shí)，所有g(shù)ras麥克風(fēng)都已經(jīng)過(guò)受控實(shí)驗(yàn)室環(huán)境中使用的可溯源校準(zhǔn)設(shè)備的調(diào)試與校準(zhǔn)。根據(jù)使用情況，測(cè)量環(huán)境以及內(nèi)部質(zhì)量控制計(jì)劃，gras建議麥克風(fēng)應(yīng)至少每年校準(zhǔn)一次。
gras提供了兩種校準(zhǔn)作為可選的售后服務(wù)：gras可追蹤校準(zhǔn)和gras認(rèn)證校準(zhǔn)
gras可追溯校準(zhǔn)是由受過(guò)培訓(xùn)的人員在受控條件下根據(jù)既定程序和標(biāo)準(zhǔn)進(jìn)行的可追溯校準(zhǔn)，這與所有g(shù)ras麥克風(fēng)作為質(zhì)量保證的一個(gè)組成部分進(jìn)行的嚴(yán)格校準(zhǔn)相同。
gras認(rèn)證校準(zhǔn)由gras認(rèn)證校準(zhǔn)實(shí)驗(yàn)室執(zhí)行，該實(shí)驗(yàn)室已通過(guò)丹麥認(rèn)證基金danak的iso 17025認(rèn)證。
丹麥g.r.a.s（gras麥克風(fēng)）應(yīng)用范圍：
--gras測(cè)量麥克風(fēng)可以在多種頻率范圍、動(dòng)態(tài)范圍和不同的應(yīng)用場(chǎng)合下使用。
要選擇適合您的具體測(cè)量需要的麥克風(fēng)，您的考慮很可能被概括為:
--自由場(chǎng)、壓力場(chǎng)或隨機(jī)事件。
--動(dòng)態(tài)范圍和頻率范圍。
電容話(huà)筒的輸出是一個(gè)非常高的阻抗信號(hào)，因此對(duì)電纜的電容負(fù)載非常敏感。這使得需要引入高輸入阻抗和低輸出阻抗的驅(qū)動(dòng)。這樣的驅(qū)動(dòng)器稱(chēng)為前置放大器。
前置放大器的頻率范圍是由它的電子電路決定的，通常在高端有200 khz，下端為1- 10hz。下端由前置放大器的輸入阻抗和麥克風(fēng)的電容決定。高傳聲器電容提供低截止頻率。
前置放大器的動(dòng)態(tài)范圍被定義為前置放大器能處理的最高電平之間的距離，并且是可以測(cè)量的最低水平。極高水平與前置放大器的電源電壓有關(guān)，而最低電平與前置放大器本身產(chǎn)生的電噪聲有關(guān)。
gras 46ae
gras 46ac
gras 46ap
gras 46ar
gras 46af
gras 46bf
gras 46ag
gras 46dp
gras 46ao
gras 46aq
gras 46am
gras 46bd
gras 46dd
gras 46an
gras 46en
gras 46eu
gras 46au
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
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