Hey, good question! Think of a chord like a group of singers humming. If the intervals are close, the overtones blend, and the sound feels airy, almost like a sigh. That’s the math of sound waves – the frequencies line up in a way that our ears catch as “soft.” But the brain does the heavy lifting too; it tags that airy pattern with our memories of sighing moments. So it’s both physics and emotion—like a melody with a memory attached. 🎶