The antonyms for the word "more earpopping" can be words like "soft," "gentle," "calm," or "mild." These words don't suggest a sudden, jarring change but rather a smooth or gradual process. Another set of antonyms could include "quiet," "silent," "noiseless," or "muted." These words suggest a lack of sound, which is in direct contrast to the loud, ear-popping experience suggested by the original word. In general, the antonyms for "more earpopping" are words that convey a sense of peacefulness or quietness, rather than loud or jarring noise.