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GRAS麥克風(fēng)46BH-1技術(shù)介紹

最近更新時間：2019-2-26

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GRAS麥克風(fēng)46BH-1技術(shù)介紹

GRAS麥克風(fēng)    GRAS麥克風(fēng)風(fēng)球   GRAS放大器   GRAS麥克風(fēng)*  

技術(shù)介紹

通過與客戶的密切合作，我們知道數(shù)據(jù)安全非常重要，因為與不合適和不可靠的傳感器相關(guān)的成本可能決定您的項目是否成功。

對于我們的用戶，數(shù)據(jù)安全性可直接轉(zhuǎn)換為更輕松選擇麥克風(fēng)，簡化系統(tǒng)配置和減少測量誤差的請求。

為了滿足這些要求，我們發(fā)明了麥克風(fēng)套裝概念。它簡單，可靠，堅固，由麥克風(fēng)盒和前置放大器組合而成，可作為一個單元進行校準(zhǔn)。這消除了錯誤，因為只需要考慮一個靈敏度值，并且消除了污染接口的風(fēng)險。將其與我們*且經(jīng)過驗證的設(shè)計相結(jié)合，您擁有當(dāng)今業(yè)界可靠的測量麥克風(fēng)套件。

典型應(yīng)用和使用

Technology

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.

典型的頻率響應(yīng)（無保護網(wǎng)格）。

針對不同入射角的自由場校正

Typical application and use

The 46BH-1 is a pressure microphone set and as such optimized for acoustic measurements of the sound source in a closed coupler or the measurement of sound pressure at a boundary or wall; in which case the microphone forms part of the wall and measures the sound pressure on the wall itself.

自由場傳聲器用于測試聲場中的聲壓，可補償傳聲器放入聲場之后對聲壓的影響。即它所測量到的聲壓是傳聲器放入測量點之前該點的聲壓。

壓力場傳聲器

    壓力場麥克風(fēng)是用來測試實際作用到傳聲器振膜上的聲壓。這就意味著使用壓力場傳聲器會測試到由于傳聲器的放入在聲場引起的各種變化。

隨機入射傳聲器

    隨機入射傳聲器是用來測試當(dāng)傳聲器放入擴散場之前的該聲場內(nèi)某點的聲壓。在高頻段，傳聲器放入聲場后會引起聲場聲壓的變化。

戶外傳聲器

   傳聲器對測試環(huán)境因素如風(fēng)、雨和雪非常敏感。但如果使用特殊的戶外傳聲器和環(huán)境傳聲器就可以降低環(huán)境對于傳聲器測試的影響,傳聲器外部的防護措施可以保護振膜部受環(huán)境的影響。

環(huán)境傳聲器

    如考慮要降低成本時，環(huán)境傳聲器可以作為戶外傳聲器的替代方案?？梢杂糜诜蔷眯缘膽敉獍惭b

46BH-1是壓力麥克風(fēng)套件，因此優(yōu)化用于閉合耦合器中聲源的聲學(xué)測量或邊界或墻壁處的聲壓測量; 在這種情況下，麥克風(fēng)形成墻壁的一部分并測量墻壁本身的聲壓。

關(guān)于溫度范圍，請參閱規(guī)格。如果需要更高的溫度限制，我們建議考慮使用GRAS探頭麥克風(fēng)，其中麥克風(fēng)和前置放大器可以與熱源隔離。

設(shè)計

GRAS 46BH-1是一款高性能標(biāo)準(zhǔn)麥克風(fēng)套裝。在我們的潔凈室環(huán)境中，裝置組裝并用標(biāo)簽密封。但是，如果您希望單獨使用這些組件，則可以卸下麥克風(fēng)組件。

麥克風(fēng)

麥克風(fēng)盒是高質(zhì)量的IEC 61094 WS3F標(biāo)準(zhǔn)化GRAS 40BH  1/4“外部極化壓力麥克風(fēng)，專為在多種環(huán)境中的長期可靠性而設(shè)計。

前置

放大器前置放大器是GRAS 26AC-1前置放大器，它包含TEDS并基于我們*的電路板基板。在業(yè)界，這些產(chǎn)品以其低自噪聲，寬頻率和出色的壓擺率性能而聞名。

GRAS 46BH-1 1/4" LEMO Pressure Standard Microphone Set, High pressure

Freq range: 10 Hz to 20 kHz

Dyn range: 54 dB(A) to 193 dB

Sensitivity: 0.4 mV/Pa

GRAS 46BH-1 1/4“LEMO壓力標(biāo)準(zhǔn)麥克風(fēng)套件，高壓

頻率范圍：10 Hz至20 kHz 

Dyn范圍：54 dB（A）至193 dB 

靈敏度：0.4 mV / Pa

微笑，不是因為快樂的太久，是太久的時間里忘記去悲傷。有些人，有些事，只有用心去體味，才能了解得更真實。我們在人生的旅途中，少不了磕磕絆絆，雨雨風(fēng)風(fēng)?？墒侨松飞?，總會有盞心靈的明燈照耀我們，一步步，向前進

兼容性

為了按照規(guī)定執(zhí)行，GRAS 46BH-1麥克風(fēng)套件需要一個電源模塊或分析儀輸入，可為前置放大器提供電源和200 V極化。如果電源較低，則驅(qū)動長電纜的能力降低，因此降低了上限頻率。如果電壓較低，則會影響較高的動態(tài)范圍。

麥克風(fēng)套件采用5針mini-LEMO連接器端接。隨時可以使用帶有各種類型和長度的LEMO連接器的電纜組件，可提供標(biāo)準(zhǔn)長度和定制長度。

46BH-1是IEEE 1451.4 TEDS 27v。符合1.0。如果您的測量平臺支持傳感器電子數(shù)據(jù)表，您將能夠讀取和寫入屬性和校準(zhǔn)數(shù)據(jù)等數(shù)據(jù)。

系統(tǒng)驗證

TEDS的功能對于確定哪個麥克風(fēng)連接到哪個輸入通道非常有用。但是，不是檢查麥克風(fēng)是否符合規(guī)格。對于每日驗證和檢查您的測量設(shè)置，我們建議使用GRAS 42AB Sound Calibrator 等聲源。

為了進行適當(dāng)?shù)撵`敏度校準(zhǔn)，我們建議使用GRAS 42AP智能活塞式電源等參考聲源。

校準(zhǔn)

出廠時，所有GRAS麥克風(fēng)均已在受控實驗室環(huán)境中使用可追溯校準(zhǔn)設(shè)備進行校準(zhǔn)。根據(jù)使用情況，測量環(huán)境和內(nèi)部質(zhì)量控制程序，我們建議每年至少重新校準(zhǔn)一次麥克風(fēng)。

我們提供兩種校準(zhǔn)作為可選的售后服務(wù)：GRAS可追溯校準(zhǔn)和GRAS認(rèn)可校準(zhǔn)。

GRAS可追蹤校準(zhǔn)是由受過培訓(xùn)的人員根據(jù)既定程序和標(biāo)準(zhǔn)在受控條件下執(zhí)行的可追溯校準(zhǔn)。這與所有GRAS麥克風(fēng)作為我們質(zhì)量保證*的一部分的嚴(yán)格校準(zhǔn)相同。

GRAS認(rèn)可校準(zhǔn)由GRAS認(rèn)可校準(zhǔn)實驗室執(zhí)行，該實驗室已通過丹麥認(rèn)證基金DANAK的ISO 17025認(rèn)證。

如果您想要一個帶有認(rèn)可校準(zhǔn)的新麥克風(fēng)套件而不是默認(rèn)的出廠校準(zhǔn)，請在訂購時。

了解更多gras / calib。

質(zhì)量和保修

GRAS麥克風(fēng)套件由我們經(jīng)過驗證的標(biāo)準(zhǔn)產(chǎn)品組合制成，全部采用高品質(zhì)材料和品牌部件制造，經(jīng)過選擇和加工，確保終身穩(wěn)定性和堅固性。

所有部件均由丹麥工廠在經(jīng)過驗證的潔凈室環(huán)境中由熟練和專業(yè)的操作員制造和組裝。麥克風(fēng)振膜，主體和*的保護網(wǎng)格由不銹鋼制成，使麥克風(fēng)設(shè)置能夠抵抗物理損壞以及腐蝕性空氣或氣體造成的腐蝕。

這與強制鍍金麥克風(fēng)端子一起保證了高度可靠的連接。由于質(zhì)量高，我們對有缺陷材料和工藝的保修期為5年。

服務(wù)

如果您誤操作損壞GRAS麥克風(fēng)上的振膜，我們將在大多數(shù)情況下以非常合理的成本和短的周轉(zhuǎn)時間進行更換。這不僅可以保護您的投資，還可以滿足您的質(zhì)量保證部門，因為您不必?fù)?dān)心新的序列號等。

Technology

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 application and use

The 46BH-1 is a pressure microphone set and as such optimized for acoustic measurements of the sound source in a closed coupler or the measurement of sound pressure at a boundary or wall; in which case the microphone forms part of the wall and measures the sound pressure on the wall itself.

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 46BH-1 is a high-performance standard microphone set. 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 40BH 1/4" Externally Polarized Pressure Microphone, designed for long-term reliability in multiple environments.

Preamplifier

The preamplifier is the GRAS 26AC-1 Preamplifier which is inclusive TEDS 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 46BH-1 microphone set requires a power module or an analyzer input which can supply the preamplifier with power as well as 200 V polarization. If the power 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 5-pin mini-LEMO connector. Ready to use cable assemblies with LEMO connectors of various types and lengths are available in standard as well as customized lengths.

The 46BH-1 is IEEE 1451.4 TEDS 27v. 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 42AB 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          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

可選項目

GRAS AA0091 3米LEMO 5針 - LEMO 7針電纜

GRAS AA0092-CL 定制長度LEMO 5針 - LEMO 7針電纜

GRAS AL0029 1/4“麥克風(fēng)支架，POM

GRAS AL0013 1/4“麥克風(fēng)支架，不銹鋼

GRAS AL0005 旋轉(zhuǎn)頭

GRAS AL0006

GRAS RA0022 1/4“Nosecone

GRAS AM0071 擋風(fēng)玻璃用于1/4“麥克風(fēng)

GRAS RA0127 用于1/4“麥克風(fēng)的防雨帽

GRAS 12AA 具有增益，濾波器和SysCheck發(fā)生器的2通道功率模塊

GRAS 12AK 具有增益，濾波器和SysCheck發(fā)生器的1通道功率模塊

GRAS 12AQ 2通道通用電源模塊，帶信號調(diào)理和PC接口

GRAS 42AB Sound Calibrator，Class 1

GRAS 42AP 智能活塞，0級

GRAS CA0029麥克風(fēng)套件的可追蹤校準(zhǔn)

GRAS CA2301麥克風(fēng)套件的認(rèn)可校準(zhǔn)

WAUKEE         19010159901

WAUKEE         19010159801

WAUKEE         19010159601

WAUKEE         19010159701

BIMBA            FO-3123FCMT

KALAMZOO     K7B-1/110

UFM               NM-DSF200I

NASON           XM-11C-986F/HH

GEIT                R40-T60 10BLZ

GEIT                R92-T60 B1

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