Video explanation
An earcup separates into pad, baffle, dynamic driver, housing and grille, explaining sound generation and outward radiation.
Current drives a diaphragm
A voice coil in a magnetic field turns varying current into force, moving a diaphragm to generate sound.
Open rear enclosure
A rear grille lets sound and air pass, reducing enclosure effects but also allowing sound leakage and outside noise.
Structure affects acoustics
Pads, baffles and driver placement affect acoustics around the ear. Open-back construction alone does not guarantee superior sound.