KanjiJLPT N4
Sound

sound, noise

Mnemonic

You stand alone in a vast desert beneath the scorching sun. The heat is so brutal the air itself begins to vibrate, producing an eerie, low-frequency hum — a sound no human voice could imitate. That otherworldly tone rises from the sunbaked ground, filling your skull until the sound is all you know.
Additional thoughts
Picture standing upright (立) on the sun (日): the sun is so loud it radiates sound waves. The kanji literally stacks Stand on top of Sun, so imagine your feet planted on a roaring sun.
Quick recall
Stand on the blazing sun and hear its deafening sound.

Details

The keyword for 音 is sound. This kanji represents sound in a broad sense, encompassing any audible noise, tone, or musical note. It can refer to sounds produced by nature, instruments, or the human voice, and it also carries connotations of pronunciation or reading of characters. In a more abstract sense, it may evoke the idea of news or tidings, as sound was historically a primary means of receiving information.
On'yomi
おん、いん、-のん
Kun'yomi
おと、ね