Norsonic nor1218, Instruction Manual

15

Norsonic Nor1218

Instruction Manual

Specifications

Mounting direction

The microphone shall be mounted with the tip pointing 
upwards and the axis of symmetry shall be vertical. 
The acoustic reference axis for the microphone may 
either be horizontal or vertical.

Acoustic performance

General

Sensitivity: 

typically 25 mV/Pa (-32 dB re 1V/Pa) – 

individually calibrated. (Based on typical open circiut 
sensitivity of 50 mV/PA for microphone and typical 
6 dB attenuation in the preamplifier.

)

Measurement range: 

From noise floor up to at least 

140 dB re. 20 µPa (peak). 

Self-noise: 

A-weighted: < 18 dB re. 20 µPa
Z-weighted: <  22 dB re 20 µPa (22.5 Hz - 22.5 kHz

Frequency response

See Technical description.
Frequency correction is recommended for conform-
ance with the requirements in IEC 61672 for class 1 
sound level meters.

Directional response

The directional response satisfies the requirements for 
a Class 1 sound level meter according to IEC61672-1. 
See section 4.4 Directional response for further infor-
mation.

General

Mounting on a tripod: 3/8” UNC (photo-tripod)

Temperature range:

 -10ºC to +50ºC

Satisfies requirements in IEC 61672-1 when operated 
with a suitable instrument.

Air pressure: 

85 kPa to 108 kPa

Humidity/rain: 

Up to 100%, IP55

Height: 

375 mm (without tripod adapter)

Diameter: 

Approx 78 mm with windshield

Weight:

 280 g (without tripod adapter)