Experiment: Audio Scope
The experiment "Audio Scope" displays a recorded soundwave from the microphone.
There are no hardware requirements. The microphone is used to measure any sound. However, depending on your requirements you may attach an external microphone to your device.
There is no specific setup. Depending on what audio source you want to measure, you might want to aim the microphone at the sound source and try to damp the sound from the environment.
phyphox continuously records period of 50ms. In this data it looks for a time at which the audio signal crosses from negative to positive values and displays 10ms of data from this crossing. This behavior acts like a trigger on a classical oscilloscope and helps to show a "stable" picture, so maxima of signals at the same frequency are always shown in the same place.