What is the technical name for the graphical trace or wavy line etched by the phonautograph onto the recording surface?

Answer

Phonautogram

The output produced by the phonautograph, which was a continuous line inscribed onto the moving, coated surface, is specifically termed a phonautogram. This output served as the first-ever visual record of sound waves, effectively functioning as an analog image of the specific sound event that occurred. These phonautograms were stored and studied by scientists as visual artifacts providing empirical evidence of sound phenomena, detailing the physics of the vibration without any initial means of auditory playback.

What is the technical name for the graphical trace or wavy line etched by the phonautograph onto the recording surface?
inventionSoundrecordingphonautograph