dˈʊɹɹɪŋ ðə lˈeɪt nˈaɪntiːnhˈʌndɹɪd sˈɛvənti z, ðə dɪzˈaɪn wʌz ɐbˈændənd fɚɹə mˈoːɹ tɹɐdˈɪʃənəl ɐpɹˈoʊtʃ, æz ðɪ ˈoʊpəŋkˈɑːnsɛpt dɪzˈaɪn pɹˈuːvd dᵻfˈɪʃənt ɪn mˈɛni ˈæspɛkts: nˈoʊɾəbəl, ðə lˈiːkɪdʒ ʌv nˈɔɪz fɹʌm ˈʌðɚ klˈæsᵻz.
During the late 1970s, the design was abandoned for a more traditional approach, as the open-concept design proved deficient in many aspects: notable, the leakage of noise from other classes.