These vibrations let you hear different things. Even music is vibrations. Irregular vibrations are noise. People can make very complex sounds. We use them for speech.
ð iː z WORD_BOUNDARY v aɪ b ɹ eɪ ʃ ə n z WORD_BOUNDARY l ɛ t WORD_BOUNDARY j uː WORD_BOUNDARY h ɪ ɹ WORD_BOUNDARY d ɪ f ɹ ə n t WORD_BOUNDARY θ ɪ ŋ z WORD_BOUNDARY iː v ə n WORD_BOUNDARY m j uː z ɪ k WORD_BOUNDARY ɪ z WORD_BOUNDARY v aɪ b ɹ eɪ ʃ ə n z WORD_BOUNDARY ɪ ɹ ɛ ɡ j ʊ l ə ɹ WORD_BOUNDARY v aɪ b ɹ eɪ ʃ ə n z WORD_BOUNDARY ɑ ɹ WORD_BOUNDARY n ɔɪ z WORD_BOUNDARY p iː p ə l WORD_BOUNDARY k æ n WORD_BOUNDARY m eɪ k WORD_BOUNDARY v ɛ ɹ i WORD_BOUNDARY k ɑ m p l ɛ k s WORD_BOUNDARY s aʊ n d z WORD_BOUNDARY w iː WORD_BOUNDARY j uː z WORD_BOUNDARY ð ɛ m WORD_BOUNDARY f ɔ ɹ WORD_BOUNDARY s p iː t̠ʃ WORD_BOUNDARY