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

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.

The [Menu] screen appears.

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

The [Measure] screen appears.

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

The windscreen selection screen appears.

5Select 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. Select this option when the windscreen is not mounted.
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.