噪声
zào shēng · HSK 7
noise
🔊 噪 clamor + 声 sound = clamoring sound = noise; zào rhymes with loud cow's mooo
声 (shēng) is the same sound character in 声音 sound and 声调 tone. Pair it with 噪 (zào, to clamor or make a racket) and the two together name the unwanted racket: noise.
声 — 士 scholar/warrior on top + 尸-like form + components (simplified from 聲)
声 is the simplified form of 聲, which originally depicted a hanging stone chime (殸) being struck, with 耳 'ear' below to show hearing. The full form combined the sound-making instrument and the act of listening, meaning 'sound' or 'voice'. The modern simplified 声 keeps only the upper portion.