OPTIMASI DESAIN INTERIOR UNTUK PENINGKATAN KUALITAS AKUSTIK RUANG AUDITORIUM MULTI-FUNGSI (Studi kasus Auditorium Universitas Kristen Petra, Surabaya) - Indrani, Hedy C.; Faculty of Art and Design, Petra Christian University (Institute of Research and Community Outreach - Petra Christian University, 2008)