• 한국음향학회지
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• 제40권6호
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• pp.626-648
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• 2021

국내에서는 다양한 공연장르를 운영할 수 있는 다목적 공연장의 수요와 그에 따른 공급이 지속적으로 증가해오고 있다. 그러나 음향적인 측면에서는 다목적 활용에 대응하는 실질적인 고려가 이루어지지 않고 있으며, 많은 시행 착오를 거듭하고 있다. 본 논문에서는 다양한 장르의 공연이 한 공간에서 이루어질 수 있도록 실의 음향특성을 변경하는 방법들을 문헌고찰을 통해 살펴보았다. 실의 음향특성을 용도에 맞게 변화시키는 것을 가변음향이라고 하며, 수동 및 능동제어방식으로 구분된다. 수동제어방식은 가변흡음, 용적가변, 부가잔향실법, 그리고 캐노피 반사 등의 방식으로 구분되는 건축적인 가변방식이며, 능동제어방식은 In-line, Regenerative 그리고 Hybrid 시스템으로 전기적인 방법에 의해 제어된다. 본 연구에서는 각각의 수동제어방식들이 실제 다목적 공연장 및 다양한 장르에 적용된 사례와 그 장단점을 살펴보았다. 또한 각각의 능동제어방식이 적용된 시스템들을 살펴보고, 실제 다목적 공연장에 적용된 사례와 그에 따른 음향적 변화에 대해 알아보았다. 마지막으로 가변음향시스템을 활용한 다목적 홀의 기획 및 설계 단계에서 고려사항을 제안하였다.

• 한국소음진동공학회:학술대회논문집
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• 한국소음진동공학회 2003년도 춘계학술대회논문집
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• pp.802-807
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• 2003

International Convention Center Jeju(ICCJ) was planed and built for accommodating a variety of conventional and exhibitional activities. For a better flexibility of operation, almost all rooms in ICCJ are designed to be subdivided Into a couple of small rooms with installation of movable partition walls. Architectural and acoustical design should be deliberatively and cooperatively undertaken to cope with such a complex condition. Conference hall, the largest room in ICCJ, has a capacity of 5000 seats who:1 used as a whole. It could be divided into 3 halls, one with 2000 pre-installed seats on slanted floor, up/down removable stage and its settings above, and the other 2 flat rooms with no seats installed. A devided hall with pre-installed seats and stage is designed for a multi-use auditorium. Almost all surfaces except ceilings adjacent to the stage are sound absorptively treated, in regard to extensive use of sound reinforcement systems. Its reverberation time 1.65 sec without audience, which is roughly correspond to 1.50 sec with fully occupied audience. When there is a need for a larger room, all the partition wail Is removed and the hall could be used as a whole. Exhibition hall is located in the first floor of ICCJ. Absorption and softness are needed for the hat 1 because exhibition behavior has something noisy features. Perforated MDF panels with porous materials and air space in the back groundare adopted for the walls. There are one large, two medium, and several small convention rooms in ICJJ. The room are also acoustically designed for maximum flexibility with no defects soundwisely.

• 전자공학회논문지
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• 제50권12호
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• pp.205-209
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• 2013

기존의 반향신호 억제기는 스피커와 마이크 사이의 선형 관계만을 고려하여, 마이크로 입력된 신호로 부터 반향신호를 억제한다. 하지만 실제적으로 스피커는 비선형성을 가지고 있으며, 이 때문에 기존의 반향신호 억제기는 비선형 반향신호 환경에서 그 성능이 저하된다. 본 논문에서는 스피커의 비선형성을 모델링하기에 적합한 주파수영역상의 Least square 방식의 Volterra filter를 적용한 비선형 반향신호 억제기를 제안하였다. 객관적 성능평가 방법인 Echo Return Loss Enhancement (ERLE)와 Speech Attenuation(SA)를 도입하여 제안된 알고리즘의 성능 검증에 사용하였다. 제안된 알고리즘이 기존의 반향신호 억제기보다 선형 및 비선형 반향 신호 환경에서 우수한 성능을 보이는 것을 확인하였다.

• 한국주거학회:학술대회논문집
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• 한국주거학회 2004년도 추계학술대회 논문집
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• pp.349-354
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• 2004

In accordance with recent culture-advancement and national improvement in conscious level, the desire for cultural life is on increasing, so that it is also increasing tendency toward the planning and construction of large performance hall for the local residents, conducted by the provincial self-governing body. For the sake of a satisfiable acoustic efficiency at the said large performance hall, although it is designed and constructed with application of various methods of simulation from the planning stage, there could be appeared an error of the said simulation and defect occurred in the construction, and due to such reason, a situation unable to fulfill a satisfiable Acoustic efficiency to be generated thereat after opening of the hall. Accordingly, it is able to judge on the part which necessitates for betterment, also the region where acoustically weak, through measurement and evaluation on the acoustic efficiency in the completed performance all, and by its correction as well as supplement thereon based on the afore-mentioned, a performance hall equipped with the supreme acoustic condition could be established.

• 한국소음진동공학회:학술대회논문집
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• 한국소음진동공학회 1997년도 춘계학술대회논문집; 경주코오롱호텔; 22-23 May 1997
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• pp.675-680
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• 1997

The object of this study is the numerical analysis about the sound pressure distribution in reverberation rooms. In order to obtain the effect of the boundary conditions of the wall, the sound field was computed for various absorption coefficients and impedances. And the effect of the room shape was investigated by dealing with pentagonal type as well as the rectangular type. In addition an experiment was performed for the sound pressure distribution in a reverberation room and the result was compared with the analysis.

• 한국소음진동공학회논문집
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• 제20권12호
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• pp.1139-1146
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• 2010

The indoor noise of the naval vessel is very important related to the optimum environmental conditions for crews as well as the ability of fighting power of antisubmarine. Especially, sonar equipment room is one of the rooms where require to be silent because the informations of the underwater noise are collected and analyzed in there. In this paper, the sound reduction of the TASS console, one of the main noise sources in a sonar equipment room for a typical naval vessel, is described. The noise source of this TASS console is the flowing noise of cooling fan. In order to reduce this kind of noise, the plenum chamber and acoustic elbow were developed. Related to the development of the plenum chamber, the area of the air-outlet and sound absorption of the inner lining were investigated experimentally with the evaluation system of the sound insertion loss. Acoustic elbow was also manufactured and evaluated with the evaluation system of the sound insertion loss. Finally, in order to evaluated the ability of noise reduction of the plenum chamber and acoustic elbow, the indoor noise of the sonar equipment was measured when they were appled to TASS console.

• 한국소음진동공학회:학술대회논문집
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• 한국소음진동공학회 2010년도 춘계학술대회 논문집
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• pp.462-462
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• 2010

Glass fiber is widely used in architectural acoustics or building acoustics for sound absorption since it was introduced into China for about 50 years. But recent years, with people pay more attentions to the air cleansing and their health which may be affected by the tiny fiber of the glasswool, a voluntary tendency opposing glass fiber of room using is gradual appeared in China. This paper discusses both the main opinions towards the question whether there are harmful impacts on people health from glassfiber, and the application circumstance of it's applying in china. This paper focuses on another substitute sound absorbing material, melamine foam, to discuss the strong environmental friendly tendency opposing glass fiber of room using in China now.

• 한국소음진동공학회:학술대회논문집
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• 한국소음진동공학회 2007년도 추계학술대회논문집
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• pp.1037-1041
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• 2007

With the advent of sound field simulator, many sound fields have been reproduced by obtaining the impulse responses of specific acoustic spaces like famous concert hall, opera house. This sound field reproduction has been done by the linear convolution operation between the sound input signal and the impulse response of certain acoustic space. However, the conventional finite impulse response based linear convolution operation always makes real-time implementation of sound field generator impossible due to the large amount of computational burden. This paper introduces the fast convolution method using perceptual redundancy in the processed signals, input audio signal and room impulse response. Temporal and spectral psycho-acoustic filters considering masking effects are implemented in the proposed convolution structure. It reduces the computational burden of convolution methods for realtime implementation of a sound field generator. The conventional convolutions are compared with the proposed one in views of computational burden and sound quality. In the proposed method, a considerable reduction in the computational burden was realized with acceptable changes in sound quality.

• 한국정보통신학회:학술대회논문집
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• 한국해양정보통신학회 2000년도 춘계종합학술대회
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• pp.386-391
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• 2000

타공 구조물은 음파의 에너지를 감소시키는 특성을 가지고 있어 무향실의 벽에 많이 이용되고 있다. 음원으로부터 발생한 음파가 타공판을 통과할 때 타공판의 작은 구멍을 통해 강한 제트가 형성되어 점성에 의한 박리가 일어나 음파 에너지의 일부분이 열에너지로 소멸된다. 타공판의 작은 구멍을 통과하면서 발생하는 물리적 현상은 음향학 분야에서 많은 연구가 이뤄졌다. 타공판의 앞뒤의 음압(Acoustic Pressure)의 차이를 속도에 제곱에 비례하는 항력항(Drag Term)과 가속도에 비례하는 관성항(Inertia Term)의 합으로 표현하였고, 각 항에 포함된 계수들을 실험이나 간단한 계산을 통하여 구하는 방법을 제시하였다.

• 한국소음진동공학회:학술대회논문집
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• 한국소음진동공학회 2007년도 추계학술대회논문집
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• pp.236-241
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• 2007

Recently, in accordance with the cultural progress and the improvement of citizen's consciousness level, it is the real situation that the construction of small-scaled Multi-Purpose Hall where various cultural events could be performed, is on increasing. However, because the most of Multi-Purpose Hall had been designed and built up without any consideration on Acoustic Factor, many problems are on occurring thereat. Because those small-scaled Multi-Purpose Hall have been mostly used with the finishing material which contains a high degree of Acoustic Absorption indiscreetly, both diffusion and reflection of sound are not establishing properly, and since the reverberation of sound is very low, in case of musical performance by musical instrument, its sound hears too arid and stiff, there occurs some acoustic defect such as it becomes difficult for music appreciation with sufficient timbre, so that the capability improvement on the matter is urgently requiring situation. On this viewpoint, this Research has caught the Authenticity of the forecasted value and actually measured value using Acoustic Simulation on the subject of the small-scaled Multi-Purpose Hall, and then intended to propose the optimum acoustic condition on the basis of the Authenticity. As the result, it could be designed a Multi-Purpose Hall equipped with the satisfactory acoustic performance compare with the time before improvement, so that it is considered that such research result could be practically used as the fundamental material when design for other similar small-scaled Multi-Purpose Hall in the future.