tympanum

definition: a large hemispherical brass or copper percussion instrument with a drumhead that can be tuned by adjusting the tension on it
example:
speech part: noun
synonyms: kettle
definition: the membrane in the ear that vibrates to sound
example:
speech part: noun
synonyms: eardrum tympanic membrane myringa
definition: the main cavity of the ear
example:
speech part: noun
synonyms: middle ear tympanic cavity

How tympanum is being used?