• 한국주거학회논문집
• /
• 제19권4호
• /
• pp.49-57
• /
• 2008

The case study for this research is a middle school music room located in Iksan City, Korea. Although the room is used for teaching music, indiscreet sound-absorbing materials were applied within the space. Accordingly, a number of difficulties have been experienced when using the room. During a music lesson, the sound-volume is inadequate for music appreciation, while the music performance has an arid sound due to an insufficient echo. In order to control the obstructive factors resulting from a short Reverberation Time, the acoustic factor is optimized in this study by using an Acoustic Simulation, following an arrangement of Acoustic Design. A Psycho-acoustics Experiment was conducted using the Auralizational Technique, whereby the Virtual Acoustic Field can be experienced at the design stage.

• 한국주거학회:학술대회논문집
• /
• 한국주거학회 2008년도 춘계학술발표대회 논문집
• /
• pp.272-275
• /
• 2008

In case a middle school music room locating in Iksan City, this space had been finished its construction work with the indiscreet sound-absorbing materials despite the music lesson is taught thereat. Accordingly, when music lesson since it sounds aridly due to insufficiency of echo and sound-volume feeling in music appreciation or music performance sound, there is some difficulty in the music lesson. For the purpose to control the obstructive factors owing to such short Reverberation Time, it optimizes the acoustic factor using Acoustic Simulation after arrangement of Acoustic Design, it has conducted a Psycho-acoustics Experiment using the Auralizational Technique that can experience the Virtual Acoustic Field at its designing stage. As the result of investigation about the acoustic satisfaction on the relevant subject space and the satisfaction with regard to the pertinent each items, it was known that the valuation on acoustic performance was evidently improved at 'after-reformation' than 'before-reformation'. It is considered that such material could be utilized as the useful material that can improve the architectural acoustic factor when construction and renovation of any middle school music room in the future.

• 교육시설
• /
• 제10권4호
• /
• pp.5-20
• /
• 2003

The purpose of the research on the noise of educational facilities is to build up pleasant environments by minimizing the influence on the students in the school. This study provides fundamental data for acoustic design by measuring, computer simulation and analyzing the room acoustic characteristics of the lecture room in middle school. For measurement on the factors of room acoustic, RT of lecture room and noise reductions depending on various walls of different structures were measured and analyzed. The lecture system being installed and carried out on the normal lecture room was divided into 4 types-employment of multimedia machines, employment of multimedia machines and loud speakers, employment of loud speaker, and existing verbal speaking-and SPL for each type was measured and analyzed. Based on the measured characteristics of acoustic characteristics for normal lecture room, the problems for environment of noise were understood through computer simulation, applications for improvements of performance for each facility were studied, schemes for improvements of performance by using the effects were presented, necessary fundamental data were secured, and schemes to enhance flexibility on the existing facilities of school against changing educational courses were secured.

• 한국안전학회지
• /
• 제26권1호
• /
• pp.8-14
• /
• 2011

Noise and vibration are likely to disturb the sensory system of human body leading to psychological stress and thereby property damage. In this research, a cut out switch(COS) with a built-in acoustic absorber along with a COS fuse broken was developed to reduce percussion noise. This new system is based on a design approach that combines existing absorber systems: expansion type, resonator type, and acoustic absorber type silencer The noise performance of the new system was simulated using the $SYSNOISE^{TM}$ software under optimized parameters: the diameter of perforated plate 2 mm, the plate thickness 3 mm, the width of expansion room 25 mm, the impinging vortex room 14 mm, and the noise absorbtion room 10 mm. The results showed that it reduced noise by approximately 41.1 dB compared to the current systems available in the market. Furthermore, it showed reduced noise by approximately 12 dB more than a product with an acoustic absorber of the Fault Tamer(USA).

• 한국음향학회지
• /
• 제38권2호
• /
• pp.139-144
• /
• 2019

콘서트홀의 소리품질을 나타내는 실내음향 지표들이 다수 개발되어 있으며, 청취자들이 기대하는 소리에 관한 경험적인 연구의 결과로 각 실내음향 지표들의 적정 범위가 제안되었다. 그러나 세월의 흐름에 따라 연주나 청취환경의 경향이 변하고 있고, 각 지표의 적정 범위에 대해 연구자들의 이견이 존재하는 등의 문제가 드러나고 있다. 콘서트홀의 음향환경에 대해 청취자들이 어떠한 선호개념을 갖고 있는지 조사하고 이를 콘서트홀의 음향설계에 반영하여야 한다. 이 연구에서는 음악의 연주 및 청취에 전문적인 경험을 갖고 있는 우리나라의 청취자들을 대상으로 콘서트홀 음향효과에 대한 선호도를 조사하고 평가하였다. 그리고 그 결과를 반영하여 청취조건을 구현하는 콘서트홀의 음향설계 프로세스를 제안하였다.

• 교육녹색환경연구
• /
• 제19권2호
• /
• pp.21-31
• /
• 2020

본 연구는 교육품질에 직·간접적인 영향을 미치는 다양한 환경요소 중 음환경에 대한 내용을 W대학 인문대 소공연장의 리모델링 사례를 통해 분석하고자 하였다. 본 연구의 대상인 W대학 인문관의 소공연장은 강의전용 공간으로 리모델링하기에 앞서 적당한 울림이 필요한 공연장과 상대적으로 음성의 명료성이 중요한 강의실의 음향성능 차이를 인지하고 강의전용 공간에 적합한 실내 음환경을 조성하고자 하였다. 따라서 본 연구에서는 리모델링 전 음향성능 측정, 음향 시뮬레이션을 통한 마감재료 변경안 제시, 리모델링 후 음향성능 측정의 단계를 거쳐 리모델링에 따른 강의전용공간의 음향성능 개선안의 사례를 제시하고자 하였다. 이러한 과정은 추후 마감재 변경을 통한 강의전용 공간 등 교육공간에 적합한 실내 음향성능 확보의 사례로 활용될 수 있을 것으로 사료된다.

• 한국주거학회:학술대회논문집
• /
• 한국주거학회 2008년도 춘계학술발표대회 논문집
• /
• pp.436-440
• /
• 2008

Among those various facilities attached to the school building, the Auditorium is being utilized for not only the Exercise Activity but also for many purposes such as Culture, Public Performance, Education, Assembly and so on. In order to utilize in maximum such function of the multipurpose auditorium, an adequate acoustic design with regard to the Clarity of Voice and Music in accordance with its use-purpose should be accompanied. However, as the most part of multipurpose auditoriums is designed with high ceiling-height by its peculiar character, and due to use of the material of strong reflexibility, it is appearing the defect that excessively exposes the reverberation of sound. In order to make out an optimal acoustic condition within the broad space such as an auditorium, the acoustic characteristics must be considered from the planning stage, however in the most case, those acoustic problems are being settled through the repair works after construction. On such viewpoint, this Study intends to analyze the room acoustic characteristics from the planning stage using a computer simulation based on the blueprint of multipurpose auditorium in S High School located in Gwangju. It is considered that the material analyzed in such way could be practically applied as a fundamental material enables to improve the acoustic capability when a similar broad space is planned hereafter.

• 설비공학논문집
• /
• 제19권6호
• /
• pp.476-484
• /
• 2007

Recently, in accordance with the buildings are becoming to large-sizes, high-stories, the large scaled facilities and equipments in machine room are quite demanding, and the generated noise volume according to this situation is on increasing. Since such noise is becoming to the object of a serious civil appeal, it is the real situation that a reduction countermeasure against the machine room equipment noise is keenly necessitated. On such viewpoint, this study has recorded, measured the noises which were generated from each individual as same as the whole equipped machines and tools, on the object of the dormitory machine rooms of the 3 colleges that haying mutually different peculiarities, then after grasp-ing their characters and acoustic powers, this research has verified its prediction possibility and the authenticity by comparison the estimated numerical value with the actually measured numerical value through the acoustic simulation. After grasping the prediction possibility in such way, by utilization of the sound absorption material in the machinery room, from the stage of design, the soundproof measures for the noise reduction at machine room could be regulated effectively, and it is also considered that such data would be utilized as the fundamental material for an establishment of the measure for sound insulation.

• 한국주거학회:학술대회논문집
• /
• 한국주거학회 2003년도 정기총회 및 추계학술대회
• /
• pp.67-72
• /
• 2003

The present article evaluates a performance hall, which improves sound efficiency. In general, the sidewall of the music hall is plane circle. thus there happens a focus phenomenon. To overcome it. the music hall improves its sound efficiency by making its sidewall irregular. After measuring impulse response from the performance hall, evaluation indices on the temporal distribution of sound energy such as RT, EDT, D50, C80, RASTI and BR were obtained, and based on them, indoor acoustic characteristics and the generation of echoes were determined. According to the results, evaluation indices showed that the acoustic condition was satisfactory in general. This study is to provide fundamental data for acoustic design of music hall with round form by analyzing the room acoustic characteristics of music hall.

• 한국주거학회:학술대회논문집
• /
• 한국주거학회 2004년도 추계학술대회 논문집
• /
• pp.367-371
• /
• 2004

The purpose of this research is furnishing of basic material for acoustic planning hereafter, after understanding the acoustic merits and demerits through measuring and analyzing on room acoustic of small performance hall. As the result of the measurement, those physical evaluation indexes such as SPL, RT, EDT, $D_{50}$, $C_{80}$, RASTI have being kept the satisfiable acoustic condition for the service of performance hall. Therefore, as small performance hall is regarded as equipped with sufficient volume of sound, reverberatory feeling and diffusive feeling, it judges as an excellent performance place, also it is considered that it could be utilized as a useful material when design so similar performance hall, hereafter.