The most used laboratory standard microphones are Types 4160 (1‐inch) and 4180 (1/2‐inch). These microphones have a well‐defined cavity in front of the diaphragm and are optimized for use in couplers and for maximum long‐term stability under reference conditions. The most common way of performing primary calibration of laboratory standard microphones is to use the reciprocity calibration principle. Brüel & Kjær offers the world’s most used reciprocity calibration apparatus, Type 5998, which is part of Reciprocity Calibration System Type 9699.
Brüel & Kjær laboratory standard microphones Type 4160 (1-inch) and 4180 (1/2-inch) constitute sound pressure references with a primary (reciprocity) calibration. They comply with standards:
- IEC61094-1, ANSIS1.15-1
- IEC61094-2, ANSIS1.15-2
All Microphones at a Glance on BKSV.com