make a racket, call out to
嚾 centers on loud vocal noise: making a racket, shouting, or calling out to someone. The meanings all involve using the voice forcefully or noisily.
嚾 combines 口 (mouth) with 雚, which likely contributes the sound and may relate to calling or noise. The exact historical development is uncertain.
A mouth (口) next to 雚, a component that looks like a bird with a crest, suggests a noisy bird squawking loudly. Picture a racket of calls coming from that mouth.
For カン, imagine a can being kicked down the street, making a loud racket: can -> カン, and the noise calls out to everyone.