Practically, it was difficult to decrease, more volumes from the room because of many other consider-, ations not limited to the acoustical requirements. The utilization of this system adds an important advantage, Different views for the CAD model studied by ODEON. 5 5 (a) SPL(A) calculated by ODEON (occupied room); (b) LA, measured in the balcony (unoccupied) (The bold points in (b) indicate columns supporting the balcony, see, (NC-25, blue curve). UP These auditoriums include a wide range of spaces and, usage. the model prepared for this phase of the analysis. WAITING Speech intelligibility (SI) increases proportionally with increase of SNR; achievement of an optimal reverberation time (T Opt ) comes in the second importance after achieving suitable L [4]. Results of, sound isolation and reverberation time were compared with, reference values found in the Brazilian and the international, standards. This means that the sounds that will, actually reach students’ ears will vary from one position to an-, other and from a lecturer to another assuming the constancy of, are installed on the side walls and distributed symmetrically, around the stage. will point out some major benefits of using acoustics in auditoriums and also discuss on what causes poor and Sabine’s formula analysis, the reasons were identified. [11] Elkhateeb A. Contained in this highly useful collection are several AutoCad architectural drawings for 11 auditorium projects + Acoustic and visual analysis of 4 auditoriums. The operation economics also mandated the utilization of, natural lighting and ventilation in the room. 2012 Ain Shams University. increased recently as a desire to improve listening conditions. The administration of the uni-, versity and the design team of the auditorium are interested, in making this room matched-well with the acoustic require-, ments for the modern lecture auditoriums. RT value of lecture hall reduce from RT=3.5 Hz to RT=0.95 Hz and the range of energy consumption reduce in hall after these treatments 70%. For this purpose, several particle sizes classes, and thicknesses were tested in the impedance tube in the frequency range [50-1400] Hz. represents that all of the measured values (unoccupied case), are located in the acceptable range (the gray zone in, ter than required. method, technics and the materials been used. For comparison, these, Due to the architectural constraints, the optimum values, for some of the mentioned acoustic indicators cannot be, achieved. DRG. Thus, the slopes of the different room floors, a). 5 This work deals with an experimental investigation of the acoustic absorption of two kinds of materials, i.e. Optimizing acoustic conditions for two lecture rooms in Faculty of Agriculture, Cairo University, Audit of Auditoriums in an Academic Setting, Ghana, Acoustic improvement on two lecture auditoria: Simulation and experiment, Enhancement of Acoustical Performance in Universities' Educational Spaces, Investigation of loose wood chips and sawdust as alternative sustainable sound absorber materials. lvl.+600 TOILET 5 The acoustic objectives in speech rooms, the related objective indicators considered in this work and their optimum values. 3(a) and Fig. The aim of this research work is to design a central Air- conditioning system for a 2500 capacity auditorium so that the load calculation in the building conforms to the air This zone also contains small areas located at the, corners of the room where there are slight increase in the val-. Then. TERRACE V.I.P ENT. lvl.+600 (a) Manufactured wood (MDF), 12. is the thickness (depth) of the cavity (m). The results did not provide strong, arguments for major changes to these criteria for acoustical. The work also discusses some of the architectural details that were used and have a direct effect on the acoustical environment inside the auditorium. According to the acoustical ref-, . ), has been designed in 4…, Autocad drawing of a Commercial/Township building boundary wall…, Calligraphy is simply an art. Membrane, occupied by ODEON) (Shaded area indicates the acceptable, = T calculated occupied (by ODEON) in design phase, absorber was installed in the front part of the room near the, tic properties for the different surfaces defining room, Field measurements of the acoustic indicators related to, speech intelligibility prove the success of room finishing mate-, rials in offering good hearing conditions. (a) In the floor; (b) in the balcony (The gray points in (a) indicate columns). Instead, a brief discussion will be presented as required, It can be said that architectural acoustics in general and audi-, torium acoustics in particular, seek two main objectives, cal environment, which is known as sound absorption and, The achievement of these two objectives is the main concern, in every auditorium, but the strategies may differ according to, the acoustical activities inside the room. Whitfield for their help and valuable discussion. Also, ALCONS was calculated based on the measured RT. 4.2, assuming the occupied case). [10] ''The combination of such computer model studies and a limited number of validation measurements in real rooms is a cost effective approach for developing better information for designing better classrooms". IMPROVING THE ACOUSTIC PERFORMANCE USING SUSTAINABLE MATERIALS CASE STUDY: LECTURE ROOMS. (such as carpets, acoustic tiles, curtains, cotton and fiberglass), these materials are characterized by their relatively high, In their original form, the absorptive materials have unac-, ceptable appearance from the architectural and environmental, standpoint. From the statistical point of view, about 37.5% of the students, receive intelligibility between ‘‘Excellent and Good’’, and. 4.2 to calculate the considered acous-, tic indicators related to speech intelligibility and to check their, compatibility with their optimum values as mentioned previ-. The different setups, calculation conditions, .

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