CCP Pressure Standard Microphone Set GRAS 1/2″ 46AO (3.15-20kHz)

Introduction

• The 46AO is a high-precision microphone suitable for laboratory work.
• 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.
• Two front-vented versions are available, the 46AO-FV 1/2″ CCP Pressure Front Vented Microphone Set, and the high level version  46AO-FV-HL 1/2″ CCP Pressure Microphone Set, Front Vented, High Level.

Design

• The GRAS 46AO 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 WS2P standardized GRAS 40AO 1/2″ Prepolarized Pressure Microphone, designed for long-term reliability in multiple environments.

Preamplifier

• The preamplifier is the GRAS 26CA 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.
• 46AO is rear-vented, but it is also available in a front-vented version, 46AO-FV.

Compatibility

• To perform as specified the GRAS 46AO 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 BNC connector. Ready to use coax cable assemblies of various types and lengths are available in standard as well as customized lengths.
• The 46AO 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.