| Autor: |
Utami, Sentagi S., Fela, Randy F., Sarwono, Joko, Widowati, Kristina |
| Předmět: |
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| Zdroj: |
AIP Conference Proceedings; 2019, Vol. 2088 Issue 1, p050008-1-050008-10, 10p |
| Abstrakt: |
Counselling rooms are needed by psychologists to perform psychotherapy, an activity that requires private conversation between the psychologist and the client. Complains of sound leakage through the counselling rooms of Psychology Counselling Unit in UGM Indonesia were reported. This study provides recommendation to optimize the sound insulation in the partition walls. The method relies on improvement of the STC using room impulse response (RIR) and modeling of the composite partitions with INSUL 8.0 software. The RIR provides reverberation time using omnidirectional speakers and 2 omnidirectional microphones positioned 1.2 meters above the floor. The RT estimates the total absorption of the space. The noise reduction is the difference between the SPL measured with a microphone in the source's room and the SPL measured with another microphone in the receiver's room. The source was a pink noise signal generated through a direct speaker. The simulation result of the existing partition materials, consists of gypsum board ½ inch double panel without absorbent material, has an STC value of 36. Meanwhile, from the on-site measurement, for room D.204 and room D.205 the STC is 31, for room D.206 the STC is 28, and STC of 27 for room D.205 with the source in room D.206. This result does not meet the standard STC for partition walls in counselling rooms which is 45dB. The optimization of sound insulation performances was done through simulations in INSULS 8.0 with 2 scenarios that are most reasonable to occur, given the existing room conditions. The best partition wall design attained an STC of up to 45 using 16 mm double gypsum board panel with 68 mm cavity containing 60 kg/m³ rock wool. Furthermore, the result also indicated that the noise leaking was caused by the lack of sound insulation capability of the partition walls and occurrences of flanking noise. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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