Pink noise test tone
In this custom pink noise audio test generator all audio frequencies are represented at the same volume, the frequency curve is flat throughout the spectrum. This is ideal to test your speaker setup and room acoustics.
In regular pink noise there's a slight drop in volume towards the higher frequencies and after 10.000 hertz the drop is more substantial, so we induced a bit of white noise to flatten this curve. Due to the nature of pink noise and slightly pronounced low end this combined noise is less fatiguing on the ears so you can setup your system in a more comfortable way.
With a reference microphone and a frequency spectrum analyser you can detect peaks and dips in your room acoustics. These are caused by audio frequencies building up or cancelling each other out due to speaker positioning and room acoustics. Always measure from the listening position.
The onscreen frequency curve is your reference.
With a perfect speaker and room setup your spectrum analyser should display the same curve.
If your curve has substantial peaks and dips it means that at the spot where you measured there is a problem resulting in those peaks and dips.