Submit Manuscript | http://medcraveonline.com Introduction The initial study about the nature of sound is attributed to Pythagoras (580-500 BC). 2 He succeeded in inventing a single instrument which consisted of a sound frame with a movable bridge and a string drawn on it. By using this device, he found that two instruments drawn in a longitudinal ratio of 1 to 2 produce notes that are separated by an octave. A higher instrument creates a shorter note. 3 J His Arch & Anthropol Sci. 2023;8(2):59‒67. 59 ©2023 Asadi et al. This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and build upon your work non-commercially. Acoustic investigation of architectural spaces with an emphasis on traditional architectural decorations (the case study of the sound room of Ali-Qapu Palace) Volume 8 Issue 2 - 2023 Shaham Asadi, 1 Ali shokoohi 2 1 Master of Architecture, Architecture teacher, Education (and Training) Administration of East Azarbaijan Province, Iran 2 Assistant Professor, Department of Architecture, Zanjan Branch, Islamic Azad University, Zanjan, Iran Correspondence: Shaham Asadi, Master of Architecture, Architecture teacher, Education (and Training) Administration of East Azarbaijan Province, Iran, Tel 09144268265, Email Received: May 20, 2023 | Published: June 05, 2023 Abstract The architecture 1 of the Safavid 2 period is one of the best architectural styles in Iran, both in terms of construction and decorations and innovations. Safavid kings tried to create lasting art for all generations due to their great interest in architecture and urban planning. Among the lasting works of Safavid art, we can mention the Ali Qapu Palace of Isfahan, which is built on six foors. The biggest rooms of the palace are on the last foor of the mansion and Shah Abbas used to receive his special guests in them. On this foor, we reach one of the masterpieces of Iranian architects; the music room or the sound room, the central part of which is designed in the shape of a cross and has an area of about 63 square meters. Introducing the favorite pottery of the Safavid kings, that is, Carafes 3 , thermoses, and jugs, and the most widely used forms of Tongbori, that is, jars. Safavid systems also introduce the most widely used pottery. Probably, some Tongboris were also infuenced by metal and glass samples. The vertical surfaces of the walls and the horizontal divisions of Aliqapu have infuenced the form of Tongboris. The present research is about this music room. In this research, as the background and basics of the research, after analyzing the acoustic basics, while emphasizing the clarity of speech and reverberation time as measured variables; Then, we have introduced the history , name of Ali Qapu Palace , the Tongs and the shapes and containers of the walls in a descriptive way and with library tools; In the feld of his case study and fundamental study, he has used a completely quantitative approach and accurate calculation method with two simulation tools (walls without Tong and roof without muqarans) and feld measurement to compare their results. The results of this research consider the role of Tongs and muqarans in reducing sound energy, reducing reverberation time, and improving speech clarity very necessary and necessary. Keywords: ali qapu, acoustics, tangbari, sound room, speech intelligibility, Isfahan Research questions: 1) What is the effect of the form and materials of Ali Qapu Palace, the Tongboris and the decorations of the walls and ceiling on the acoustic level and the clarity of speech of the building? 2) How many types of Tongboris are used in palace decorations? 3) What method has been used to measure and evaluate the Speech intelligibility and its timing? 1 AliQapu Palace (Persian: وپاقیلاع, ‘Ālī Qāpū) or the Grand Ali Qapu is an imperial palace in Isfahan, Iran. It is located on the western side of the Naqsh-e Jahan Square, opposite to Sheikh Lotfollah Mosque, and had been originally designed as a vast portal entrance to the grand palace which stretched from the Naqsh-e Jahan Square to the Chahar Baq Boulevard. The palace served as the offcial residence of Persian Emperors of the Safavid dynasty. 2 The Safavid era is one of the golden eras of Iranian architecture and art infuenced by Shiite and Iranian thought, especially during the 42-year reign of Shah Abbas I, in which thinking, ideology and economics grew because of the silk trade. As a result of the centralized consolidation of power and economics following the political formations, the state sought its ideas in the feld of art and architecture. 1 3 A Carafe (/kəˈræf/) is a glass container with a fared lip used for serving liquids, especially wine and coffee. Unlike the related decanter, carafes generally do not include stoppers. Coffee pots included in coffee makers are also referred to as carafes in American English. Journal of Historical Archaeology and Anthropological Sciences Research Article Open Access