insistent
This term describes a quality of persistence that borders on the aggressive or the unavoidable. When applied to a person, it suggests a firm, unyielding demand that can feel pressuring or stubborn to others, often leaving little room for negotiation. When applied to sounds or sensations, it evokes a rhythmic, repetitive quality that demands immediate attention. It is not merely loud, but possesses a relentless cadence that makes it impossible for the listener to ignore the stimulus.
Meanings
Refusing to accept a refusal or a different opinion; demanding that something be done or that a certain state of affairs be accepted.
"He was insistent that the meeting be postponed until next week."
Continuing in a way that is loud, repetitive, and difficult to ignore.
"The insistent ringing of the telephone woke her from a deep sleep."