• The Journal of the Acoustical Society of Korea
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• v.11 no.3
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• pp.83-93
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• 1992

• The Journal of the Acoustical Society of Korea
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• v.11 no.4
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• pp.45-52
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• 1992

• The Journal of the Acoustical Society of Korea
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• v.11 no.4
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• pp.73-79
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• 1992

• The Journal of the Acoustical Society of Korea
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• v.12 no.4
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• pp.78-85
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• 1993

• Proceedings of the Acoustical Society of Korea Conference
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• autumn
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• pp.451-454
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• 1999

서양음악의 연구는 음향학의 측면에서 수십년 동안 연구가 진행되어왔다. 이를 통해 콘서트홀의 음향학적 특성을 평가할 수 있는 객관적 지표들을 제시할 수 있었다. 하지만 국악에 있어서는 공연장에 대한 음향학적인 지표가 공식화된 것이 없고, 게다가 지표를 찾기 위한 충분한 국악전용 공연장의 수가 부족하다. 따라서 본 논문에서는 국립국악원 예악당의 모델을 기초로 한 컴퓨터 모의실험을 통해서 얻어진 가상 국악공연장을 바탕으로 RT, Warmth, IACC, ITDG 등의 4가지 지표를 가지고 각기 다양한 시료를 제작하여 청취실험을 실시하였다. 그 결과 서양음악과는 다른 경향의 RT, Warmth 선호도를 추출할 수 있었다.

• The Journal of the Acoustical Society of Korea
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• v.13 no.1
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• pp.93-98
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• 1994

This study aims to find the theoretical consideration of the basic simularity rule between scale model experiment and real building as a results ; 1. In the case of room acoustics, $f_m=n\cdot{f_r}\;T_m=T_r/n\; \alpha_m(f_m)=\alpha_r(f_r)$ 2. That of sound Insulation : $TL_m(f_m)=TL_r(f_r)$

• The Journal of the Acoustical Society of Korea
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• v.19 no.2
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• pp.73-82
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• 2000

This paper presents a significant improvement achieved in the acoustic characteristics of a conference room of I-company originally designed and built without consideration for room acoustic characteristics. The reverberation time of the room was excessive, which resulted in poor 'Definition' for speech. Thus the improvement of room acoustic characteristics was required. In this study, experiments and simulations using the principles of geometrical acoustics were executed to improve the acoustic characteristics in the room. By performing a series of simulation, it has become possible to predict acoustic parameters for an improvement plan. And the improvement plan of room acoustic characteristics was established. And for the verification of the simulation results, the experimental data were compared and evaluated against those from the simulation. Additionally, the proposed method in this paper demonstrated its effectiveness by successfully improving the room acoustic characteristics resulted from repair construction.

• The Journal of the Acoustical Society of Korea
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• v.19 no.2
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• pp.8-12
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• 2000

This paper describes the sensitivity stability of a mandrel type fiber optic acoustic sensor with respect to its environmental conditions such as hydrostatic pressure and underwater temperature. The sensors under consideration have various mandrel structures such as a cylindrical mandrel, a concentric composite mandrel, and an air-backed concentric composite mandrel. The analysis results show that the sensors have such good robustness, less than 0.15dB, in its sensitivity with respect to the variation in hydrostatic pressure. Further, the nylon concentric composite mandrel type sensor including an air cavity turns out to have the most superior stability than others to the underwater temperature variations.

• The Journal of the Acoustical Society of Korea
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• v.34 no.3
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• pp.177-183
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• 2015

This paper proposes a robust nonlinear acoustic echo canceller (NAEC) which is effective for modeling the nonlinearity of a speaker module and the long acoustic echo path within a speech communication environment. The proposed NAEC utilizes a sigmoid pre-processor for modeling the speaker nonlinearity and a partitioned block frequnecy-domain adaptive filter for identifying the acoustic echo path with small delay. Simulation results confirmed that the proposed algorithm achieves excellent performance with much lower computational complexity than the previous NAEC.

• The Journal of the Acoustical Society of Korea
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• v.38 no.2
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• pp.139-144
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• 2019

Various room acoustic parameters and their optimal values were proposed and verified as proper interpretations to the listeners' preference of concert hall sounds. However the listening environment has been changed since they were developed, and the listeners' preference may not be the same among countries of different cultural backgrounds. Actual listeners' preference should be applied to the design of a new concert hall. A survey on the listening preference was carried out for 22 music experts. A room acoustical design process was proposed which made the acoustical environment of a concert hall as close to the listeners' preferences.