GRAS麥克風46BE設計理念GRAS風球貨期快價格好
GRAS麥克風 GRAS風球 GRAS放大器 GRAS模塊 GRAS前置器 GRAS* GRAS代理
46BE的設計理念：
--46BE是一款率的用于測量高度聲量級和高頻段音頻的麥克風套裝，其被設計可長時間穩(wěn)定用于復雜多元環(huán)境下。
--46BE的預偏振是通過一個在嚴格控制條件下負荷于麥克風底板的電介體還獲得，然后電介體會充電以匹配特定的麥克風感音性。
--46BE的自帶前置放大器是配備Microdot連接器的標準前置放大器26CB，其是基于GRAS的電路板底座而設計的。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)。
機遇，抓住了就會成功，錯過了就會失敗。書籍，學習就是知識，沒看就是廢紙。理想，努力了叫夢想，放棄了只是妄想。努力，雖然未必會有收獲，但放棄就一定一無所獲。再好的機會，也要靠人把握，放手去做
為了執(zhí)行的GRAS 46BE麥克風設置需要一個恒定電流輸入模塊，可以提供4毫安和24 V卸載CCP電壓供應。如果恒流源較低，則驅(qū)動長電纜的能力降低，從而降低了上行頻率。如果電源電壓較低，將影響上動態(tài)范圍。
麥克風組用10/32 UNC微型女性連接器終止。各種規(guī)格和長度的同軸電纜組件可用于標準和定制長度。
46BE是IEEE 1451.4 TEDS V 1兼容。如果您的測量平臺支持換能器電子數(shù)據(jù)表，您將能夠讀取和寫入數(shù)據(jù)，如屬性和校準數(shù)據(jù)。
系統(tǒng)驗證
TEDS的功能對于確定哪一個麥克風連接到哪個輸入通道是非常有用的。然而，它不是檢查麥克風是否在規(guī)格之內(nèi)。為了日常驗證和檢查您的測量設置，因此我們建議使用像GRAS 42AG聲音校準器這樣的聲源。
對于適當?shù)撵`敏度校準，我們建議使用參考聲源，如GRAS 42AP智能活塞式電話。
校準
當離開工廠時，所有的GRAS麥克風已經(jīng)在可控的實驗室環(huán)境中使用可追溯的校準設備進行了校準。根據(jù)使用、測量環(huán)境和內(nèi)部質(zhì)量控制程序，我們建議麥克風每年至少重新校準一次。
我們提供兩種校準作為一種可選的售后服務：GRAS溯源校準和GRAS認證校準。
GRAS可追溯校準是由受過訓練的人員根據(jù)既定的程序和標準在控制條件下進行的可追溯校準。這與嚴格的校準是一樣的，所有的GRAS麥克風都作為我們質(zhì)量保證的組成部分。
GRAS認證校準由GRAS認證校準實驗室執(zhí)行，該實驗室已根據(jù)ISO 17025由丹麥認證基金DANAK認證。
如果您想要一個新的麥克風組交付的認證校準代替默認的工廠校準，訂購時。
在GRAS／Calb學習更多。
質(zhì)量與保證
GRAS麥克風組由我們經(jīng)過驗證的標準組合的組件組成，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由熟練和專業(yè)的操作人員在一個經(jīng)過驗證的潔凈室環(huán)境中生產(chǎn)和組裝的。麥克風膜片、主體和*的保護柵格由不銹鋼制成，使麥克風組能夠抵抗物理損傷以及由腐蝕性空氣或氣體引起的腐蝕。
這一點，加上強制鍍金麥克風終端保證了高度可靠的連接。由于質(zhì)量好，我們對有缺陷的材料和工藝的保修期為5年。
服務
如果你們錯誤地損壞了GRAS麥克風上的光圈，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)時間來更換它。這不僅可以保護您的投資，而且可以滿足您的質(zhì)量保證部門，因為您不必擔心新的序列號等。
GRAS 46BE典型應用與使用
46BE是一個自由場麥克風組，這樣就優(yōu)化了所有聲學應用，其中主聲源的位置是已知的，麥克風可以直接指向它，確保0°入射。然而，應該注意的是，1/4“麥克風主體和隔膜的小尺寸也使得壓力和隨機入射（擴散場）測量到20 kHz，而不去除保護柵極或需要進一步補償。如果你不能指出你的聲場的性質(zhì)，這個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量，其中小失真和高分辨率是通過膜片的小尺寸和快速響應獲得的。
關于溫度范圍，請參閱說明書。如果需要更高的溫度限制，我們建議考慮GRAS探頭麥克風，麥克風和前置放大器可以與熱源隔離。
GRAS 46BE設計
GRAS 46BE是一種高性能的1/4“自由場標準麥克風，用于測量高頻下的高聲壓水平。在我們的潔凈室環(huán)境中，用一個標簽組裝和密封。但是，如果您希望單獨使用這些組件，可以拆卸麥克風組。
GRAS 46BE話筒
麥克風盒是高質(zhì)量的IEC 61094 WS3F標準GRAS 40BE 1/4“預極化自由場麥克風，設計用于多種環(huán)境中的期可靠性。
預極化是通過駐極體獲得的，駐極體在高度受控的條件下施加在麥克風背板上。然后，駐極體充電以匹配的麥克風靈敏度。
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標準前置放大器與微連接器，并基于我們*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
測量麥克風組
測量麥克風集已經(jīng)結(jié)合起來，所以它們滿足了用戶的典型測量需求。獨立于您的測量系統(tǒng)和應用程序，您應該能夠找到一套適合您的需求。麥克風設置可以直接連接到所有專業(yè)的測量系統(tǒng)，如可供7雷莫輸入。
如果你的測量平臺支持智能傳感器根據(jù)IEEE 1451.4（TEDS）你可以簡單地插入麥克風，他們會認同他們的特性、類型和校準數(shù)據(jù)。多頻道用戶特別欣賞的特性。
GRAS麥克風套裝46BE概述：
通過與客戶的密切合作,GRAS明白數(shù)據(jù)安全是非常重要的,因為在不合適的和不可靠的傳感器上投入的成本可能會決定你的項目結(jié)果導向是成功與否。對于用戶來說,數(shù)據(jù)安全要求更簡約的麥克風選擇,更簡單的系統(tǒng)配置,更的測量誤差。為滿足這些需求,GRAS發(fā)明了麥克風套裝的概念。這是一個簡約，可靠又耐用的整合了麥克風和前置放大器的產(chǎn)品概念，由于這種設計理念使得只有一個感應數(shù)值需要計算同時避免了接口處的污染，所以幾乎杜絕了測量誤差。GRAS通過將獨到且經(jīng)認證的設計理念有機結(jié)合，為用戶提供了為可靠且實用的測音麥克風綜合套組。
--46BE是一款為聲學應用而設計的自由場麥克風套裝，當聲源位置已知時，46BE可以以其確保的0°入射角直接指向測量音源。
--46BE在不移除防護欄且無需進一步校準補償?shù)那闆r下，其1/4"極小尺寸任然可以確保壓力及無規(guī)律入射（擴散聲場）的測量閾值高達20kHz。
--46BE的這種、多功能測量范圍使得用戶在不能確定聲場屬性的時候顯得極為有用。
--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量儀，同時其小巧的尺寸和快反應振膜也確保了極小失真率和*分辨率。
46BE的校準標準：
--出廠時，所有GRAS麥克風都已經(jīng)過受控實驗室環(huán)境中使用的可溯源校準設備的調(diào)試與校準。根據(jù)使用情況，測量環(huán)境以及內(nèi)部質(zhì)量控制計劃，GRAS建議麥克風應至少每年校準一次。
GRAS提供了兩種校準作為可選的售后服務：GRAS可追蹤校準和GRAS認證校準
GRAS可追溯校準是由受過培訓的人員在受控條件下根據(jù)既定程序和標準進行的可追溯校準，這與所有GRAS麥克風作為質(zhì)量保證的一個組成部分進行的嚴格校準相同。
GRAS認證校準由GRAS認證校準實驗室執(zhí)行，該實驗室已通過丹麥認證基金Danak的ISO 17025認證。
丹麥G.R.A.S（GRAS麥克風）應用范圍：
--GRAS測量麥克風可以在多種頻率范圍、動態(tài)范圍和不同的應用場合下使用。
要選擇適合您的具體測量需要的麥克風，您的考慮很可能被概括為:
--自由場、壓力場或隨機事件。
--動態(tài)范圍和頻率范圍。
電容話筒的輸出是一個非常高的阻抗信號，因此對電纜的電容負載非常敏感。這使得需要引入高輸入阻抗和低輸出阻抗的驅(qū)動。這樣的驅(qū)動器稱為前置放大器。
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。
前置放大器的動態(tài)范圍被定義為前置放大器能處理的高電平之間的距離，并且是可以測量的低水平。*水平與前置放大器的電源電壓有關，而低電平與前置放大器本身產(chǎn)生的電噪聲有關。
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
