CCP Pressure Standard Microphone Set GRAS 1/4″ 46BG (3.15-70kHz)

Introduction

• The 46BG 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.
• Two front-vented versions are available, the 46BG-FV 1/4″ CCP Pressure Microphone Set, High Pressure, Front Vented and 46BG-FV-HT 1/4″ CCP Pressure Microphone Set, High Temp, Front Vented.

Design

• The GRAS 46BG 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 WS3P standardized GRAS 40BG 1/4″ Prepolarized Pressure Microphone, designed for long-term reliability in multiple environments.

Preamplifier

• The preamplifier is the GRAS 26CB 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 46BG 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 Microdot female connector. Ready to use coax cable assemblies of various types and lengths are available in standard as well as customized lengths.
• The 46BG 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.