The galaxy brain sound is associated with the expanding brain image meme, which became widely recognizable online during the late 2010s. The visual format presents a sequence of brains glowing with increasing intensity, usually alongside ideas that become less sensible while appearing more enlightened. Music added to video versions heightens that progression and makes the last tier feel dramatically transcendent. This audio remains useful in short edits because it communicates escalating intelligence, irony, and mock profundity without requiring spoken explanation.