殘響室 音響特性에 관한 硏究 = (A) Study on the Acoustical Performances of Reverberation Rooms

다국어 초록 (Multilingual Abstract)

The acoustic theory is considered for the conditions of divergent sound field, the measurement and estimation of diffused nature, the calculation of average inhaled sound, and the estimation of differential sound performance.
In each case of the frist, second, third rever room, the reverberatory time 18.6 second (500Hz standard), 8.3 second (500Hz standard), and 12.6 second (500Hz standard) in order of measured acoustic characteristic appeard for more long than the required minimum reverberatory time 0.5 second in each rever room; thus, this shows the good rever state.
In the form of rever damping curve, the diffused nature comes down more or less in domain of 125Hz, 250Hz low frequency in each rever room; but more than 500Hz shows the good diffused nature.
In case of the frist, second rever room the standard deviation by the high variation and each measuring point appeard less than the standard deviation of maximum permission in all 125Hz-400Hz, and sound pressing level distribution was relatively found as uniform regardless of any position.
In case of the third rever room, sound pressing distribution exceeds more or less the standard deviation of ISO in 250Hz and 1000Hz.
After this, If the use of the third rever room is considered, the establishment of diffused plate, and the alteration of an inclinatory angle will not be needed.
Also, the wall of each rever room, and differential sound performance is very excellent.
But, because the differential sound performance of specimen opening part gate falls more or less by comparing to the wall of rever room among all rever room, the measurement over 2 kinds, at the same time, needs to be avoided
Each rever room doesn't need additional acoustic treatment to more raise the diffused nature for the low-frequency substitute of 125Hz and 230Hz in each rever room needs additional adjustment of inhaled plate (a veneer board, acrylic(and, soon) having inhaled sound.
If so, the careful examinatian is required.
In case of the frist, second rever room the standard deviation by the high variation and each measuring point appeard less than the standard deviation of maximum permission in all 125Hz-400Hz, and sound pressing level distribution was relatively found a s uniform regardless of any position.
In case of the third rever room, sound pressing distribution exceeds more or less the standard deviation of ISO in 250Hz and 1000Hz.
After this, If the use of the third rever room is considered, the establishment of diffused plate, and the alteration of an inclinatory angle will not be needed.
Also, the wall of each rever room, and differential sound performance is very excellent.
But, because the differential sound performance of specimen opening part gate falls more or less by comparing to the wall of rever room among all rever room, the measurement over 2 kinds, at the Same time, needs to be avoided.
Each rever room doesn't need additional acoustic treatment to more raise the diffused nature for the low-frequency substitute of 125Hz and 230Hz in each rever room needs additional adjustment of inhaled plate (a veneer board, acrylidand, soon) having inhaled sound.
If so, the careful examinatian is required,

목차 (Table of Contents)

• 목차
• List of a Tables
• List of figures
• List of photo graphs
• ABSTRACT
• Ⅰ. 序論 = 1
• Ⅱ. 硏究背景 = 2
• Ⅱ-1 基本 音響 理論 = 2
• Ⅱ-1-1 擴散音場의 條件 = 2
• Ⅱ-2 擴散性의 測定과 平價 = 3
• Ⅱ-3 殘響室의 平均吸音率 = 7
• Ⅱ-4 遮音性能 平價 = 8
• 第Ⅲ章 實驗 = 10
• Ⅲ. 殘響室의 제원 및 構造 = 10
• Ⅲ-1 殘響室의 제원 = 10
• Ⅲ-2 殘響室의 形態 및 構造 = 12
• Ⅳ. 殘響室의 音響特性 = 15
• Ⅳ-1 殘響特性 = 15
• Ⅳ-2 平均吸音率 = 21
• Ⅳ-3 音壓레벨 分布 = 25
• Ⅳ-4 遮音性能 = 40
• 第Ⅴ章 結論 = 44
• refference = 45