Application

■ A-4-1 Simple short-term measurement

The NL-43/53 series of hand-held sound level meters can be used for short-term monitoring of aircraft noise. For this purpose, install the function expansion program NX-43EX in the NL-43/53 sound level meter to provide auto store capability. Use the outdoor windscreen WS-15 and mount the meter on a tripod. It is also possible to include the level recorder LR-07 for level recording. To process recorded data on a computer, use the AS-60 data management software for environmental measurement. The AS-60 allows specifying sound event intervals for calculation, or listening to recorded real sound to determine whether the sound event is aircraft noise.

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