Class 1 Sound Level Meter NL-53 / Class 2 Sound Level Meter NL-43
with Extended Function Program NX-43EX Instruction Manual Operation Guide

8.2 Diffuse sound field correction settings

If using the device in a diffuse sound field, set this setting to [On].
This compensates for variations in sensitivity and frequency response in diffuse sound fields for free fields.
For details, refer to the “Technical Guide”.

1Touch [Menu] on the measurement screen.

The [Menu] screen appears.

2Touch [Measure] on the [Menu] screen.

The [Measure] screen appears.

3Touch [Diffuse S.F. Corr.] on the [Measure] screen.

The setting switches between turning on/off each time you touch.

Item	Description
On	Uses diffuse sound field correction
Off	Does not use diffuse sound field correction

When [On] is selected, [DF] is displayed at the top of the screen.

4Touch [Back] or press the START/STOP key to return to the measurement screen.