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

8.1 Attaching the windscreen

When measuring noise outdoors in a windy environment or with a ventilation system present, the wind or air can come into contact with the microphone and generate wind noise, which can affect the measurement results. In such cases, wind/air noise can be reduced by installing the supplied Windscreen WS-10 to the microphone. The optional All-Weather Windscreen WS-15 or Rain-protection Windscreen WS-16 not only suppresses wind noise but also protects the microphone from light rain.
The sensitivity and frequency response change when the windscreen is attached to the microphone. When using a windscreen, correction can be made by following the procedure below. This correction ensures the device complies with the standard, even with a windscreen installed.
For details on the windscreen characteristics, refer to the “Technical Guide”.

1Attach the windscreen to the microphone.

Attach the windscreen to the microphone.

Important

  • When using the All-Weather Windscreen WS-15, remove the fall prevention rubber. Otherwise, WS-15 cannot be installed.

2Touch [Menu] on the measurement screen.

Touch [Menu] on the measurement screen.

The [Menu] screen appears.

3Touch [Measure] on the [Menu] screen.

Touch [Measure] on the [Menu] screen.

The [Measure] screen appears.

4Touch [Windscreen Correction] on the [Measure] screen.

Touch [Windscreen Correction] on the [Measure] screen.

The windscreen selection screen appears.

5Select the windscreen to use, and touch [Apply].

Select the windscreen to use, and touch [Apply].

The name of the selected windscreen is displayed at the top of the screen.

Item Description
Off Does not use windscreen correction
WS-10 Compensates for variations in sensitivity and frequency response due to attachment of Windscreen WS-10. Select this when attaching WS-10.
WS-15 Compensates for variations in sensitivity and frequency response due to attachment of All-Weather Windscreen WS-15. Select this when attaching WS-15.
WS-16 Compensates for variations in sensitivity and frequency response due to attachment of Rain-protection Windscreen WS-16. Select this when attaching WS-16.

6Touch [Back] or press the START/STOP key to return to the measurement screen.

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