Nor1205 1/4" Insert Voltage Preamplifier

The Nor1205 is a precision 1/4" insert voltage preamplifier specifically designed for use with smaller-diameter measurement microphones that offer extended high-frequency response. With a self-noise below 3 µV and high input impedance, the Nor1205 maintains the superior high-frequency accuracy of 1/4" microphones while providing the signal conditioning necessary for connection to Norsonic sound level meters and analysis systems. The compact form factor of the Nor1205 matches the reduced dimensions of 1/4" microphones, maintaining the aerodynamic and acoustic advantages of a smaller sensing element. The extended frequency response reaches well beyond 40 kHz, enabling accurate measurements in the ultrasonic range that are increasingly required for industrial process monitoring, leak detection, and machinery condition assessment. The insert voltage design supports in-situ electrical calibration for traceable measurement verification. The Nor1205 is the essential companion to the Nor1239 and other 1/4" condenser microphones, enabling high-frequency acoustic measurements, small-cavity pressure measurements, and applications where the physical size of a 1/2" microphone would cause unacceptable acoustic interference. For automotive NVH testing, aeroacoustic research, and precision laboratory work across the GCC and internationally, the Nor1205 delivers the signal integrity and bandwidth required for demanding high-frequency acoustic analysis.