Where v is the speed of the object, and a is the speed of sound.
w ɛ ɹ WORD_BOUNDARY v iː WORD_BOUNDARY ɪ z WORD_BOUNDARY ð ə WORD_BOUNDARY s p iː d WORD_BOUNDARY ʌ v ð ɪ WORD_BOUNDARY ɑ b d̠ʒ ɛ k t WORD_BOUNDARY æ n d WORD_BOUNDARY ʌ WORD_BOUNDARY ɪ z WORD_BOUNDARY ð ə WORD_BOUNDARY s p iː d WORD_BOUNDARY ʌ v WORD_BOUNDARY s aʊ n d WORD_BOUNDARY