All Norsonic microphones are Free-field 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 free field microphone should be pointed towards the sound source at a 0° angle of incidence.
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.
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.
Norsonic Calibration Laboratory is an international accreditated laboratory. This ensures that the quality of the measured values are at the highest possible level.
½” Free-field, 50 mV/Pa 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.
Cartridge size: ½” inch
Main standard: IEC 61672 Class 1
Polarisation voltage: 200 volt
IEC 61094-4 Designation: WS2F
Nominal sensitivity: 50 mV/Pa
Frequency response: ±1dB 5 Hz – 10kHz, ±3dB 3.15 Hz – 20kHz
Maximum SPL (3% dist): 146 dB 20µPa
Self noise: 15 dB(A)
Capacitance: 18 pF
Temperature coeff. (250 Hz): <-0.005 dB°C
Max. temperature: 150 °C
Static pressure coeff. (250 Hz): -0.008 dB/kPa
Relative humidity coeff. (no condens.): Not measurable dB/%
Diameter: 13.2 mm
Length: 16.2 mm
Weight: 6 g
Used, serviced, 1/2″ Free-field Condenser Microphone Nor1225 (only available against trade-in of malfunctioning Microphone Nor1225 without mechanical damage and less than 3 years old).
½” Free-field, high sensitivity self-polarised microphone for use in applications where environmental or safety considerations do not permit the use of 200-volt polarisation supplies, or as a general IEC 61672 Class 1 microphone in sound level meters with no polarisation voltage.
Cartridge size: ½” inch
Main standard: IEC 61672 Class 1
Polarisation voltage: 0 volt
IEC 61094-4 Designation: WS2F
Nominal sensitivity: 50 mV/Pa
Frequency response: ±1dB 5 Hz – 10k Hz, ±3dB 3,15 Hz – 20kHz
Maximum SPL (3% dist): 146 dB re. 20µPa
Self noise: 15 dB(A)
Capacitance: 14 pF
Temperature coeff. (250 Hz): <0.005 dB°C
Max. temperature: 120 °C
Static pressure coeff. (250 Hz): -0.008 dB/kPa
Relative humidity coeff. (no condens.): Not measurable dB/%
Diameter: 13.2 mm
Length: 16.2 mm
Weight: 6 g
½” Free-field, high sensitivity, low cost self-polarised class 1 Microphone. Ideal for use in multi-channel systems or other applications that requires a self polarised IEC 61672 class 1 microphone at low cost.
Cartridge size: ½” inch
Main standard: IEC 61672 Class 1
Polarisation voltage: 0 volt
IEC 61094-4 Designation: WS2F
Nominal sensitivity: 50 mV/Pa
Frequency response: ±1dB 20-10k Hz, ±3dB 12.5 – 16k Hz
Maximum SPL (3% dist): 146 dB
Self noise: 16 dB(A)
Capacitance: 16 pF
Temperature coeff. (250 Hz): <0.005 dB°C
Max. temperature: 80 °C
Static pressure coeff. (250 Hz): -0.004 dB/kPa
Relative humidity coeff. (no condens.): -0.003 dB/%
Diameter: 13.2 mm
Length: 17.3 mm
Weight: 9 g
½” Free-field, high sensitivity, low cost self-polarised class 2 microphone. Ideal for use in multi -channel systems or other applications that requires a self polarised class 2 microphone accuracy.
Unlike most other low cost class 2 microphones it features a nickel membrane and a stainless steel housing, ensuring low sensitivity to environmental parameters such as temperature, static pressure and humidity.
Cartridge size: ½” inch
Main standard: IEC 61672 Class 2
Polarisation voltage: 0 volt
IEC 61094-4 Designation: WS2F
Nominal sensitivity: 40 mV/Pa
Frequency response: ±3dB 20-10k Hz
Maximum SPL (3% dist): 146 dB
Self noise: 24 dB(A)
Capacitance: 13 pF
Temperature coeff. (250 Hz): <-0.01 dB°C
Max. temperature: 80 °C
Static pressure coeff.: ±0.03 dB/kPa
Relative humidity coeff. (no condens.): ±0.006 dB/%
Diameter: 13.2 mm
Length: 16.6 mm
Weight: 7 g
Please see the Norsonic Microphones product page for the most recent downloads and software updates.