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Frequently Asked Questions

Let’s Clear Up Some Things About FFT…

Part 1 of 2: The basics

The "Fast Fourier Transformation" (FFT) is an important measurement method in science of audio and acoustics measurement. It converts a signal into individual spectral components and thereby provides frequency information about the signal. FFTs are used for fault analysis, quality control, and condition monitoring of machines or systems. This article explains how an FFT works, the relevant parameters and their effects on the measurement result.

Fast, Slow, Impulse Time Weighting - What do they mean?

Let’s Clear Up Some Things About Distortion…

Frequency-Weightings for Sound Level Measurements

How are Percentile Statistics measured?

Can I perform type-approved measurements with the XL2 and an attached microphone?

Did you know that the XL2 provides report configuration after your measurement?

Operate the measurement microphones with 24V phantom power?

Is the XL2 a type approved sound level meter?

How can I convert my XL2 into a Type Approved XL2-TA?

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