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Microphones/preamplifiers

Nor1227

Free-field microphone

Nor1227 is a ½” free-field, high-sensitivity, self-polarised microphone designed for situations where environmental or safety requirements prevent the use of 200 V polarisation supplies.

It is equally well suited as a general-purpose IEC 61672 Class 1 microphone in sound level meters that operate without an external polarisation voltage.

Get a quote

Get a quote

Specifications

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, ±3 dB 3.15 Hz – 20 kHz
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

Environmental noise

Environmental noise

Reliable noise monitoring with sound level meter, stand-alone terminals or large-scale systems.

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Building acoustic

Building acoustic is about the sound that travels between rooms - something you'd rather avoid.

Room-acoustics

Room Acoustics

Room acoustics is about the sound quality in a room, for example in a concert hall.

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Sound Intensity

Measure sound level and direction, even in challenging acoustic environments.

Sound-Power

Sound Power

Sound Power is about how much sound energy a source emits per unit of time, measures in watts.

Noise at Work

Noise at Work

Noise measurement at the workplace for easy mapping and documentation of noise levels

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Microphones / Preamplifiers

Nor1209 Preamplifier

Nor1216 outdoor microphone

Outdoor microphones

Nor1216 Outdoor microphone

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Sound level meters

Nor145 Sound level meter

Nor150 sound level meter

Sound level meters

Nor150 Sound level meter

Calibration

How we calibrate

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Calibration

Why calibrate?

We calibrate measurement instruments to verify the accuracy of the measurements devices and...

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