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Study of partition walls to minimize leaking sound in counselling rooms
Utami S.S.a, Fela R.F.a, Sarwono J.b, Widowati K.a
a Department of Nuclear Engineering and Engineering Physics, Universitas Gadjah Mada, Yogyakarta, Indonesia
b Department of Engineering Physics, Institut Teknologi Bandung, Bandung, Indonesia
[vc_row][vc_column][vc_row_inner][vc_column_inner][vc_separator css=”.vc_custom_1624529070653{padding-top: 30px !important;padding-bottom: 30px !important;}”][/vc_column_inner][/vc_row_inner][vc_row_inner layout=”boxed”][vc_column_inner width=”3/4″ css=”.vc_custom_1624695412187{border-right-width: 1px !important;border-right-color: #dddddd !important;border-right-style: solid !important;border-radius: 1px !important;}”][vc_empty_space][megatron_heading title=”Abstract” size=”size-sm” text_align=”text-left”][vc_column_text]© 2019 American Institute of Physics Inc. All rights reserved. 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/m 3 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.[/vc_column_text][vc_empty_space][vc_separator css=”.vc_custom_1624528584150{padding-top: 25px !important;padding-bottom: 25px !important;}”][vc_empty_space][megatron_heading title=”Author keywords” size=”size-sm” text_align=”text-left”][vc_column_text][/vc_column_text][vc_empty_space][vc_separator css=”.vc_custom_1624528584150{padding-top: 25px !important;padding-bottom: 25px !important;}”][vc_empty_space][megatron_heading title=”Indexed keywords” size=”size-sm” text_align=”text-left”][vc_column_text][/vc_column_text][vc_empty_space][vc_separator css=”.vc_custom_1624528584150{padding-top: 25px !important;padding-bottom: 25px !important;}”][vc_empty_space][megatron_heading title=”Funding details” size=”size-sm” text_align=”text-left”][vc_column_text]Special thanks to the Department of Engineering Physics, Universitas Gadjah Mada for providing the acoustics laboratory facilities, particularly for the hardware and software for data analysis and also to the Department of Engineering Physics, Institut Teknologi Bandung for the license used of INSUL 8.0 and other facilities.[/vc_column_text][vc_empty_space][vc_separator css=”.vc_custom_1624528584150{padding-top: 25px !important;padding-bottom: 25px !important;}”][vc_empty_space][megatron_heading title=”DOI” size=”size-sm” text_align=”text-left”][vc_column_text]https://doi.org/10.1063/1.5095342[/vc_column_text][/vc_column_inner][vc_column_inner width=”1/4″][vc_column_text]Widget Plumx[/vc_column_text][/vc_column_inner][/vc_row_inner][/vc_column][/vc_row][vc_row][vc_column][vc_separator css=”.vc_custom_1624528584150{padding-top: 25px !important;padding-bottom: 25px !important;}”][/vc_column][/vc_row]