Auditorium の建築音響調査 : 第一生命ホール及び日比谷公会堂の場合

スポンサーリンク

概要

• 論文の詳細を見る

• Following are the summarized results of measurements on reverberation time and on sound pressure distribution in two auditoriums in Tokyo, the Hibiya City Hall having a seating capacity of 2600, and the First Life Insurance Auditorium seating 650. Both are used as public halls and are amongst the top-ranking auditoriums in Tokyo. (1) The First Life Insurance Auditorium: The sound pressure was measured at eighteen seats employing a sound source situated on the stage and producing a field intensity of 93 phones at the front edge of the stage. The result is shown in Fig. 2. A sound reflecting borad provided in the background of the stage seems to have little effect in increasing the sound pressure reaching the furthest parts of the auditorium. Noise entering from near-by streets in 44-49 phones when the double windows are closed, and 58-65 phones when the windows are open. By the use of questionnaires we have also surveyed the opinion of the audience regarding the acoustics in this auditorium. The results are presented in §5. We have discussed in the present article the date thus obtained and have formulated a plan for the remodelling of the auditorium. For measuring reverberation time we have used white noise, pulse sound and pistol sound emitted from the cneter of the stage. Average reverberation time is 1. 28 seconds on the first floor and 1. 32 seconds on the second floor, and there is little variation in the freauency characteristics. (6) Hibiya City Hall: this auditorium has an interior volume of 11, 872 cubic meters, the floor plane being as shown in Fig. 6. The sound pressure distributions is represented in Fig. 7, 8 and 9. The sound pressure of higher frequencies decreases much faster then that of frequencies as the ditance increases from the stage. The frequency characteristics of the reverberation curves in the auditorinm is almost flat thoughout the range 0. 5-2 kilocycles. The average reverberation time is 1. 4 seconds, when the auditrium is empty and 0. 9 second when full.

• 1954-12-30

著者

• 平山 嵩

  東洋大・工学部

関連論文

• Auditorium の建築音響調査 : 第一生命ホール及び日比谷公会堂の場合
• New York Philharmonic Hall の音響について
• 国際標準機構の技術委員会43(音響)について
• 国際会議報告 : 第4回国際音響学会会議(I.C.A)
• 欧米の建築音響視察
• 音響学1955年の展望(I)建築音響 : 騒音
• 基地騒音ばなし
• 巻頭言
• 建築音響上の諸問題

スポンサーリンク