The function of the eardrum in the middle ear is to

It is a part of ear drum which vibrates when sound entered in to the ear

Our eardrum is a membrane which will vibrate when the sound reaches near it & it will passes the sound to the inner ear

Non metal is an element or substance that is not a metal metal is a solid material that is typically hard, shiny, malleable, fusible, and ductile, with good electrical and thermal conductivitymetalloid is an element (e.g., germanium or silicon) whose properties are intermediate between those of metals and solid nonmetals. they are electrical semiconductors.