The Determination of Acoustical Absorbing Materials in the "Al-Marwah" Room of "Al-Akbar" Mosque in Surabaya Using Objective Parameterea Approximation  

Oleh:

Asmoro, Wiratno A.

Jenis: Article from Journal - ilmiah nasional - terakreditasi DIKTI
Dalam koleksi: IPTEK: The Journal for Technology and Science vol. 18 no. 2 (May 2007), page 63-70.
Topik: Acoustical Absorbing Materials; Objective Acoustical Parameter; Speech Intelligibility

Ketersediaan

Perpustakaan Pusat (Semanggi) Nomor Panggil: MM48.3 Non-tandon: 1 (dapat dipinjam: 0) Tandon: tidak ada

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Isi artikel

The room that used to hold speech activity needs a good acoustical quality. Todetermine the acoustical quality of a room the experimental research was conducted to find the relationship between the detrmination of acoustical absorbing materials and speech intelligibility in the "Al-Marwah" room of "Al-Akbar" mosque in Surabaya. Through the monaural acoustical measurements, the objective acoustical parameters in the "Al-Marwah" room can be found from impulse responses. Then we can use it to determine the acoustical absorbing materials in the room. Considering the acoustical parameters of RT, EDT, D50, C50, and %Alcons at several positions, we can find the relationships between those parameters. For the acoustical treatments on the ceiling of 376 m2 and the pillars of 373 m2 in the "Al-Marwah" room of the "Al-Akbar" mosque, the average values of RT and EDt un mid-band frequencies were found 5.52 sec and 7.88 sec respectively; whereas the values of D50, C50 and %Alcons were found in the range of 3.25~10.5%, -15~-9.4dB and 15~21% respectively. Those condition produce speech intelligibility on Poor to Sufficient category.

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