| [摘要] |
|
半世紀以來廳堂音響設計因素，因訴求重點的差異發展出不同風貌，但傳統鞋盒廳因適當 |
|
比例與華麗的裝飾，仍被認為具有最良好的音響品質，該室型仍被大量的使用。 |
|
本研究因此以鞋盒廳堂為對象，在固定的座席數與室容積及廳堂比例的設定下，以電腦模 |
| 型(Odeon
4.0)與縮尺模型(1/20)為輔助工具，探討在空間局部分割下，設計元素對室內均 |
|
齊度與擴散性的影響，分析中共包含9觀眾席測點與6個音源點。電腦模擬探討的分析指標 |
|
包括餘響時間(T30)、音強指數(G)、側向音能比(LF），所探討元素以觀眾席構成、側牆構 |
| 成、懸吊反射版為主；縮尺模型探討的指標另包括雙耳互相關係數(IACC)、回音指標(EC) |
|
、音染色指數(TD)、清晰度指數(C80)等，以舞臺周邊的擴散表面配置為探討重點。 |
|
電腦模擬結果發現，無側樓座的觀眾席配置方式的餘響時間較有側樓座者略短，樓座出挑 |
|
深度不大於高度時整體音強指數量反而略高且均齊度較高，側樓座與側包廂並沒有文獻中 |
|
所提及對LF的提昇作用，例如當設置主樓層側包廂時會降低側向音能比(LF=0.15)，使用舞 |
|
臺懸吊反射版可提昇主樓層後方位置的音強指數。縮尺模型量測結果發現，各種模式對各 |
|
音響性能指標的平均值影響小於對標準差的影響，天花板配置擴散材特別能降低G值的標準 |
|
差，主要是因樓座下位置的數值有所提昇，而後牆配置擴散材則能降低T20與IACCL的標準 |
| 差，本研究成果可做為鞋盒型廳堂音響設計的參考。 |
|
| [摘要] |
| Since a half century the
elements of hall acoustical designs. There were |
| expanded many kind of forms
cause the difference key point of requisition. |
| Cause of the tradition shoe-box
hall has appropriate of rate and gorgeous |
| decorations. It still to be of
the opinion that has most well of acoustical |
| character. Actuality the
shoe-box hall was a world of used. |
| Therefor the shoe-box hall was a
subject of these research. Setting up in a |
| stable auditorium、room volume
and a scale of hall conditions. Using a |
| computer model (Odeon 4.0) and a
scale model(1/20) to do auxiliary tooling. |
| Probe into a space that divided
up a partial. To find out that how the effect |
| of uniformity and diffusions in
concert hall with changing elements. |
| The analysis included 9
auditorium receivers and 6 sound sources. Analysis of |
| computer model included
reverberation time(T30)、strength factor (G)、lateral |
| fraction (LF). The research
elements were major in auditorium molds、lateral |
| of walls、suspensory reflection
surfaces. The research index in a 1/20 scale |
| model included inter-awral cross
correlation (IACC)、echo criteria(EC) |
| 、temporal diffusion(TD)、clarity(C80)
. The effective of using of diffusive |
| surface on the stage edge. |
| The results of computer
simulated, the RT of lateral balcony undisposed was |
| shorter than disposed. The whole
of the G and the uniformity were rise. When |
| the balcony depth small than
height. Lateral balcony and lateral stateroom can |
| not to increase LF. These were
different from records. |
| Using suspensory reflection
surfaces can increase the G for rear of main |
| auditorium. |
| The results of 1/20 scale model
measure. The effected on each kind of modes |
| for each analyses acoustic
average values will lower than standards. Unusual , |
| standard value of the G will be
reduced when the diffusive surfaces disposed |
| on ceiling. The numerical
increase for under seats of balcony were the main |
| reason. The diffusive surfaces
disposed on rear of wall that can reduce |
| standard values to T20 and IACC
L. |
| These research achievements can
be a reference for acoustical design of shoe- |
| box hall. |