We can also define an alternative form of the Heaviside step function as a function of a discrete variable "n":
w iː WORD_BOUNDARY k æ n WORD_BOUNDARY ɔ l s oʊ WORD_BOUNDARY d ɪ f aɪ n WORD_BOUNDARY ʌ n WORD_BOUNDARY ɔ l t ɜː n ə t ɪ v WORD_BOUNDARY f ɔ ɹ m WORD_BOUNDARY ʌ v ð ə WORD_BOUNDARY h ɛ v ɪ s aɪ d WORD_BOUNDARY s t ɛ p WORD_BOUNDARY f ʌ ŋ k ʃ ə n WORD_BOUNDARY æ z WORD_BOUNDARY ʌ WORD_BOUNDARY f ʌ ŋ k ʃ ə n WORD_BOUNDARY ə v ə WORD_BOUNDARY d ɪ s k ɹ iː t WORD_BOUNDARY v ɛ ɹ ɪ ə b ə l WORD_BOUNDARY ɛ n WORD_BOUNDARY