ear-popping
/ˈɪəˌpɒpɪŋ/noun
A popping sensation felt within the head as pressure is equalized between different parts of the auditory canal, especially during a change of altitude.
adjective
1That causes a popping sensation felt within the head as pressure is equalized between different parts of the auditory canal.
2Painful to hear, extremely loud. Also: that catches the attention of the listener; striking or impressive to listen to.
Origin
1920s. From ear + popping.