NTi Audio XL2 Sound Level Meter - Manual (Page 114)

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Noise Curves
Noise Curves - Getting Started
Test Preparations
The XL2 reads the electronic data sheet of any connected
ASD microphones provided by NTi Audio and switches the 48V
phantom power automatically on as follows:
Connect the measurement microphone to the XL2. •
Switch on the XL2 • .

The 48V phantom power indication in the upper menu bar
changes to ASD. The XL2 is ready for acoustic measure-
ments.
Select the • Noise Curves function in the measurement
menu.
The microphone should be moved slowly to po-
sitions around the entire space at locations that
are near the average normal standing or seated
height of human ears. The recommended pe-
riod is 20 seconds or longer.
Configuration
Select the noise curve type with the rotary wheel • .
Confirm with enter • .
The XL2 measures all noise curve types at the
same time, thus you can change the selection
also after the measurement.