Microphone Cartridges
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Product Data Microphone Cartridges Norsonic’s range of microphones covers most application and can be used as direct replacement with other brands. Full use has been made of modern materials which when coupled with traditional engineering skills produces microphones that meet all the requirements of the precision measurement standards yet are robust and resistant to corrosion. These microphones are used in conjunction with the Norsonic range of preamplifiers that closely couple to them and ensure perfect matching to the associated instrument with minimum disturbance to the acoustic field. The preamplifiers have the necessary signal handling capability and low self noise to allow full use to be made of the wide dynamic range of the microphones. The key components that determines the accuracy of a sound level meter is the measurement microphone and its associated preamplifier. The effectiveness of these components in converting the acoustic signal into an electrical analogue set the maximum accuracy that can be achieved by the ensuing signal processing. Norsonic have a carefully balanced range of measurement microphones to suite a range of applications that complement modern instrumentation yet maintain traditional values. Free-Field Microphones Calibration of all Norsonic microphones is directly traceable to National and International Standards with particular attention being paid in the design to ensuring long term stability. Each microphone is delivered with an individual certificate of calibration giving all the key information relating to its performance. This includes the nominal sensitivity and frequency response along with the environmental data that relates to the calibration. All Norsonic microphones are freefield types. A free-field microphone is designed to measure the sound pressure in the sound field, compensating for the influence of the presence of the microphone in the sound field. In effect, the microphone measures the sound pressure as it existed before the microphone was introduced in the sound field, i.e. free-field conditions. Applicable standard is IEC  61672 and the former IEC 60651. The freefield microphone should be pointed towards the sound source at a 0° angle of incidence. Norsonic Calibration Laboratory is an international accreditated laboratory. This ensures that the quality of the measured values are at the highest possible level.

Cartridge Overview Below is a summary of our range of microphone cartridges. Nor1220 is a ½” free-field response microphone with a high sensitivity.A general purpose microphone with an integral actuator grid to allow electrostatic calibration checks to be carried out without removing the protection grid. Conforms to IEC  61672 Class 1. Nor1225 is a ½” free-field high sensitivity microphone. A general purpose microphone covering the frequency range from 3.15Hz to 20 kHz. Correspond to the Class 1 of the sound level meter standard IEC  61672. Nor1227 is a ½” free-field, high sensitivity...