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G.R.A.S. 40BI 1/4" Ext. Polarized Intensity Microphone Set - 5 Pages

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Catalogue excerpts

G.R.A.S. 40BI 1/4" Ext. Polarized Intensity Microphone Set Date 10-06-2013. Page 1 of 5 G.R.A.S. 40BI 1/4" Ext. Polarized Intensity Microphone Set Sensitivity: 4 mV/Pa Freq resp: 4 to 100 k Hz Dynamic range: 35 dBA to 161 dB The 40BI is an IEC 61094-compliant, WS3F ¼" externally polarized sound-intensity microphone pair. The 40BI microphone pair consists of two phase-matched free-field condenser microphones with extremely well-controlled phase characteristics for use in sound-intensity probes. Their standard mounting threads make them compatible with all the usual available makes of measurement-microphone preamplifiers. Introduction The 40BI is an IEC 61094-compliant, WS3F ¼" externally polarized sound-intensity microphone pair. The 40BI microphone pair consists of two phase-matched free-field condenser microphones with extremely well-controlled phase characteristics for use in sound-intensity probes. Their standard mounting threads make them compatible with all the usual available makes of measurement-microphone preamplifiers. The 40BI can be used in the G.R.A.S. Sound-Intensity Probe 50AI for high frequency sound-intensity measurements. The 50AI is delivered with ½" microphones, and the 40BI can be ordered as accessories so

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G.R.A.S. 40BI 1/4" Ext. Polarized Intensity Microphone Set Date 10-06-2013. Page 2 of 5 that you can cover a large frequency range for your sound-intensity measurements. Because the 40BI measures higher frequencies, smaller spacers - 6 mm, 12 mm, and 25 mm – are included with the 40BI. 40BI is individually factory-calibrated and delivered with a calibration chart stating its specific open-circuit sensitivity and pressure frequency response. Typical applications and use The 40BI is designed for sound-intensity and sound-power measurements, as well as sound-source localization. Each 40BI microphone...

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G.R.A.S. 40BI 1/4" Ext. Polarized Intensity Microphone Set Date 10-06-2013. Page 3 of 5 connection, enables G.R.A.S. to offer 5 years warranty against defective materials and workmanship. Service If you accidentally damage the diaphragm on a G.R.A.S. microphone, we can — in most cases — replace it at a very reasonable cost and with a short turn-around time. This not only protects your investment, but also pleases your quality assurance department because you don’t have to worry about new serial numbers, etc. Calibration Before leaving the factory, all G.R.A.S. microphones are calibrated in a controlled...

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G.R.A.S. 40BI 1/4" Ext. Polarized Intensity Microphone Set Date 10-06-2013. Page 4 of 5 Temperature range, storage [dB/°C / dB/°F] Static pressure coefficient @250 Hz Humidity range non condensing Influence of axial vibration @1 m/s² CE/RoHS compliant, WEEE registered Weight

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G.R.A.S. 40BI 1/4" Ext. Polarized Intensity Microphone Set Date 10-06-2013. Page 5 of 5 Tradition Since the establishment in 1994, G.R.A.S. have been 100% dedicated to developing and manufacturing high-quality measurement microphones and related acoustic equipment. Founded by the Danish acoustics pioneer Gunnar Rasmussen who for more than 60 years has contributed to the world of sound and vibration with his unique ideas and designs. From the first reproducible 1” condenser measurement microphone that enabled quality measurements and instrumentation for acoustic calibration, Mr. Rasmussen’s ingenuity...

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