Updated on January , 2017. Copyright © 2017 KASUGA ENTERPRISES Vasai Maharashtra India. Auditorium Overview The Auditorium space types are the areas for large meetings, presentations, and  performances. Auditorium space type facilities may include assembly halls, exhibit  halls, auditoriums, and theaters. It also may include features as sound reinforcement  systems, audiovisual systems and projection screens, food service facilities,  proscenium stages with heights.   Auditorium spaces are designed to accommodate large audiences. As such, they tend to  have wide spans and are multiple-stories high in order to accommodate seating, sight-  line, and acoustical requirements. Raised stage/dais floors and special lighting  equipment are often required as well. Typical features of Auditorium space types include  the list of applicable design objectives elements as outlined below.   Functional / Operational Sloped Floors: Sloped floors, with level terraces for each row of seating, help  provide the proper sight-lines from the audience to the stage.  Fixed Seats: Typically, fixed seats with tilting upholstered seat and back, integral  arm and tablet arm are provided with articulated back for maximum occupant  passage space between rows. The seats may be fully upholstered or wood  contoured outer back and seat shells with wood armrests with tablet arm option  and aisle light option at row ends. Seat number/row letters should be put properly.  Special Lighting: Dramatic lighting systems include front lighting, foot lighting,  spot lights, follow spot lights, beam lights, and flood lights, and a projection  room/booth with manual and programmable lighting controls, and space for the  spot light operator space. Lighting systems should be flexible to accommodate  various performance venues (e.g., lectures, plays, musical performances, etc.) in  the Auditorium.  Occupancy: Occupancy Group Classification is Assembly A1 or A3 as per IBC, with  sprinkler protected construction, and GSA Acoustical Class A space requiring  special acoustical design.   Productive Special Acoustical Design: Quality acoustical characteristics are important in  Auditorium spaces so that performances and presentations can be clearly heard  and understood. For performance spaces and general presentation spaces,  recommended noise criteria (NC) rating ranges from NC-20 to NC-30;  recommended sound transmission class (STC) rating ranges from STC 40 to STC  50. Good Sound System Design: This is very important for Auditoriums and needs to  be installed properly.     KASUGA ENTERPRISES-Auditorium Consultant in Mumbai India, Ravi Rele