Borman started the first sleep shift but found sleeping difficult because of the constant radio chatter and mechanical noises.
bˈoːɹmən stˈɑːɹɾᵻd ðə fˈɜːst slˈiːp ʃˈɪft bˌʌt fˈaʊnd slˈiːpɪŋ dˈɪfɪkəlt bɪkˈʌz ʌvðə kˈɑːnstənt ɹˈeɪdɪˌoʊ tʃˈæɾɚ ænd mᵻkˈænɪkəl nˈɔɪzᵻz.