Soundproofed prefabricated buildings made primarily of metal, namely, soundproofed operator cabins, soundproofed operator booths, soundproofed control rooms, soundproofed factory offices, soundproofed test rooms, soundproofed electrical rooms, soundproofed clean rooms and soundproofed studios; soundproofed walls made primarily of metal; soundproofed partitions for building made primarily of metal; acoustic doors and windows made primarily of metal; acoustic barriers made primarily of non-meta...