This alone would have made the engines noisy, but the problem was compounded by the need for a modest amount of afterburning (reheat) at take-off (and transonic acceleration).
ðɪs ɐlˈoʊn wʊdhɐv mˌeɪd ðɪ ˈɛndʒɪnz nˈɔɪzi, bˌʌt ðə pɹˈɑːbləm wʌz kɑːmpˈaʊndᵻd baɪ ðə nˈiːd fɚɹə mˈɑːdɪst ɐmˈaʊnt ʌv ˈæftɚbˌɜːnɪŋ ɹᵻhˈiːt æt tˈeɪkˈɔf ænd tɹænsˈɑːnɪk ɐksˌɛlɚɹˈeɪʃən.