In sound design, a bass drop—often called a "subdrop" or "downer"—is a low-frequency sound (typically a sine wave) that rapidly decreases in pitch, creating a falling sensation.

It acts as a sonic "punctuation mark" to emphasize a climax, transition between scenes, or signify a heavy impact.

Most high-quality drops start around 60–90 Hz and slide down to 20 Hz , the lower limit of human hearing. 2. Popular Uses in Media