Analysis

After the measurements have been performed, it is time to analyze them. Move to the Analyze tab in ACME.

FFT settings

µZ requires specific FFT settings:

1. FFT length: corresponding to 1 second; e.g. 48000 if the sample rate is 48 kHz
2. Window: Hann
3. Overlap: 75%

To prevent errors, ACME overrides the settings that are manually entered in the settings dialog. It only does so for µZ measurements.

Compute settings

µZ tool

Select the µZ tool.

The other tools like Sound Level Meter - time dependent and Power Spectra work on the measurements as well, but access the raw microphone data instead. They can be useful for trouble shooting and are normally not required when using the impedance tube.

Output quantity

Further settings depend on the output quantity and are described on page Output quantity.

Message box

The message box near the bottom shows information about the calibration tied to the selected measurement. It also warns if a measurements cannot be plotted.