• Proceedings of the Korean Society of Computer Information Conference
• /
• 2021.01a
• /
• pp.269-271
• /
• 2021

본 논문에서는 실제 현실에서 표현되는 소리의 특징인 파동(Sound wave)과 흐름(Sound flow) 그리고 회절(Diffraction of sound)을 가상환경에서 실시간으로 표현할 수 있는 방법을 제안한다. 우리의 접근 방식은 소리가 재생되는 위치로부터 장애물 여부를 판단하고, 장애물이 존재할 시, 장애물로 인해 반사와 회절된 새로운 소리 위치를 계산한다. 이 과정에서 레이트레이싱 기반으로 장애물과의 충돌 여부를 판단하고, 충돌에 의해 굴절된 벡터를 이용하여 장애물 너머에서 들리는 소리의 크기를 계산하며, 충돌된 레이의 개수에 따라 소리의 크기를 감쇠시킨다. 본 논문에서 제안하는 방법을 이용한 소리의 회절은 물리 기반 접근법에서 나타나는 회절 형태를 실시간으로 표현했으며, 장애물에 따라서 회절 패턴이 변경되고, 이에 따라 소리의 크기가 자연스럽게 조절되는 결과를 보여준다. 이 같은 실험은 실제 현실에서 나타나는 소리의 퍼짐과 같은 특징을 거의 유사하게 복원해냈다.

• Proceedings of the Korean Society of Computer Information Conference
• /
• 2022.01a
• /
• pp.369-372
• /
• 2022

본 논문에서는 장애물 객체의 회전 벡터를 이용하여 VR 환경에서의 효율적으로 음향 처리 및 합성하는 방법을 제안한다. 현실에서 소리와 장애물이 있을 때, 소리는 장애물의 형태에 따라 퍼지면서 전파되는 형태를 보여준다. 이 같은 특징을 가상현실 환경에 유사하게 음향 처리하고자 하며 이를 위해 장애물 객체의 위치와 소리의 근원지 위치를 입력으로 소리의 전파 형태를 근사한다. 이때 모서리 부근에서 표현되는 소리의 회전을 계산하기 위해 장애물의 회전벡터(Curl vector)를 기반으로 소리의 회전을 추출하였으며, 장애물 형태를 컨볼루션(Convolution)하여 소리가 바깥 방향으로 전파되는 형태를 모델링한다. 또한, 장애물과 소리 벡터 사이의 거리, 소리 근원지와 소리 벡터 사이의 거리를 계산하여 소리의 크기를 감쇠 시켜 주며, 최종적으로 장애물 주변으로 퍼지는 벡터 모양인 외부벡터를 합성하여 장애물로부터 외부로 퍼지는 벡터의 방향을 설정한다. 본 논문에서 제안하는 방법을 이용한 소리는 장애물과의 거리와 형태를 고려하여 퍼지는 사운드 벡터 형태를 보여주며, 소리 위치에 따라 소리 감소 패턴이 변경되고, 장애물 모양에 따라 흐름이 조절되는 결과를 보여준다. 이 같은 실험은 실제 현실에서 소리가 장애물의 모양에 따라 나타나는 소리의 변화 및 패턴을 거의 유사하게 표현할 수 있다.

• Journal of the Korea Society of Computer and Information
• /
• v.27 no.11
• /
• pp.81-87
• /
• 2022

In this paper, we propose diffraction-based sound control method to improve sound immersion in a virtual environment. The proposed technique can express the wave and flow of sound in a physical environment and a pattern similar to diffraction in real-time. Our approach determines whether there is an obstacle from the location of the sound source and then calculates the position of the new sound reflected and diffracted by the obstacle. Based on ray tracing, it determines whether or not it collides with an obstacle, and predicts the sound level of the agent behind the obstacle by using the vector reflected and refraction by the collision. In this process, the sound attenuation according to the distance/material is modeled by attenuating the size of the sound according to the number of reflected/refracted rays. As a result, the diffraction pattern expressed in the physics-based approach was expressed in real time, and it shows that the diffraction pattern also changes as the position of the obstacle is changed, thereby showing the result of naturally spreading the size of the sound. The proposed method restores the diffusion and diffraction characteristics of sound expressed in real life almost similarly.

• Journal of The Korean Association For Science Education
• /
• v.38 no.3
• /
• pp.393-405
• /
• 2018

In this study, we classified the group model construction types in the actual classroom situation implementing the instructional strategy mixed with individual model construction and group model construction types. The purpose of this study is to analyze the information flow and the individual construction types of each group model construction type to obtain implications for model co-construction in a real classroom environment. A two-session class on sound propagation was carried out for thirty-three 8th grade students in Seoul. A total of 65 individual model construction and 16 group model construction processes were collected and analyzed. The group model construction types were classified as unchanged, enumerated, and elaborated. The unchanged type was found in 8 groups, the enumerated type in 3 groups, and the elaborated type in 5 groups. The isolated individual and independent construction (i.I) were found mostly in the unchanged group construction type (50.0%) and enumerated group construction type (54.5%). In the unchanged type, the radial shape of flow in which one student's information is transmitted to all the members of the group appeared. In the enumerated type, the starting point of the information flow was observed from two individuals. In the elaborated type, linear information flow appeared and both the second dissemination and reflective construction (2d.R) contributed to the group model construction (58.3%). This study suggests a viewpoint that enables to understand the process of complex model construction in an actual classroom context rather than in an ideal situation. The result of this study suggests the necessity of a modeling strategy considering the characteristics of Korean small group culture. It is expected that the discussion will progress through further studies.

• (The) Research of the performance art and culture
• /
• no.43
• /
• pp.325-356
• /
• 2021

This study is to analyze the current status of transmission and musical characteristics of Naeseo-deulilsori in Changwon, and the purpose of this study is to illuminate the value of deulilsori in Naeseo region, so that it can be continuously inherited. Naeseo-deulsori consists of the Mosimgi-sori, Nonmaegi-sori, and Chingchingi-sori. Mosimgi-sori, which is called when planting a seedling, is divided into 6 types according to the order and situation of work. ① rice planting sound, ② rice planting sound called in the morning, ③ rice planting sound called at lunch time, ④ rice planting sound called after lunch, ⑤ rice planting sound called when it is raining or cloudy, ⑥ rice planting sound called at sunset. Mosimgi-sori, which is called when planting a seedling, is based on Menali-tori, but partly influenced by Yugjabaegi-tori. However, it was typical Menali-tori in the slow The sound of rice planting in the nearby Haman region, but as the speed increased in the fast The sound of rice planting, the characteristics of Menali-tori faded and la↘mi perfect fourth descending frequently appeared. In the sound of rice planting in Goseong, both slow and fast sounds were strongly influenced by Yugjabaegi-tori. In the end, the sound of rice planting in the Naeseo region is less Yugjabaegi-tori than in the Goseong region and stronger than in Haman region. This combination of tori is a musical bargaining phenomenon that appears in the border region, and it can be said to be a geographical and regional characteristic of the Naeseo region. Nonmaegi-sori has the same sound as 'Sangsadeio' throughout the nearby Goseong and Haman regions. However, in Nonmaegi-sori in the Naeseo region, a strong Gyeong-tori tendency is found in the sound received. Looking at the flow of the melody of Nonmaegi-sori, it seems that the pitch has been changed by the intestines in recent years, and this modified melodic form has continued as it is. In order to guarantee locality, this part seems to need to be corrected in the future.

• Journal of Digital Convergence
• /
• v.11 no.11
• /
• pp.381-387
• /
• 2013

Recently, emotional contents that induce emotions and respond to emotions are given attention in the field of cultural industries, and extracting emotion caused by multimedia contents is being noted. Furthermore, since multimedia contents have been quickly produced and distributed these days, researches automatically to extract the feeling of multimedia contents are being accelerated. In this paper, we will study the method of emotional value extraction in the multimedia contents using the volume value of the multimedia contents in a certain frequency among sound informations. This study allows to extract the emotion of multimedia contents automatically, and the extracted information will be used to provide user's current emotion, weather, etc. for the users.

• Journal of The Korean Association of Information Education
• /
• v.25 no.5
• /
• pp.705-712
• /
• 2021

This study aims to develop artificial intelligence education programs that can be easily applied in elementary schools according to the trend of the times called artificial intelligence. The training program designed the purpose and direction based on the analysis results of the needs of 70 elementary school teachers according to the steps of the ADDIE model. According to the survey, elementary school students developed a machine learning education program to set sound data as the theme of the most accessible in their daily lives and to learn the principles of artificial intelligence in solving problems using sound data in real life. These days, when the need for artificial intelligence education emerges, elementary machine learning education programs that solve daily life problems based on sound data developed in this study will lay the foundation for elementary artificial intelligence education.

• Archives of design research
• /
• v.16 no.4
• /
• pp.355-364
• /
• 2003

The TUI system Modeling Language(TML) developed in this research can be used for designing TUI system with concerning about TUI's characters. For design to be concerned about physical property of tangibles and control device and digital media, TML can be a framework to give a definition of each property and be used for designing action and reaction process separately. And it would be the guideline to represent interaction's dynamic property through showing parallel information flows among objects. Finally, for verification TML's suitability, TUI system to which TML was applied was developed.

• (The) Research of the performance art and culture
• /
• no.43
• /
• pp.121-143
• /
• 2021

The Aim of the this paper is to figure out impetus of the Naeseo Traditional Folk art Conservation Association. This Preservation Society derived from Hogaeri farmers' band. Through aging and hollowing out Hogaeri farmers' band got into a period of stagnation. In order to overcome slump villager and people of a township organized a conservation society in 1994. Members restored and directed folk song which from age to age for performance. are designated as cultural asset in 2017. Sutguldeong song is only song in inland area. This song are worthy of notice in . which is consist of various agricultural work songs experienced two changes. Rice-planting songs are characteristic. Especially, Executive playing a central role harden foundation of the Preservation Society. The mainspring of activity is the sense of responsibility. Preservation Society laying emphasis on recruiting new members. Preservation Society is planning to develop curriculum for Jurisdiction elementary and middle school students. This Preservation Society is made up of First generation members and Second generation members. First generation members who are born and bred in Hogaeri have been good friends both in joy and in sorrow Early days of Preservation Society. So, They has a strong family bond. In order to induce membership Members are practicing Nongak, popular folk songs, dancing program. Second generation members are not conversant with a folk song. Nonetheless They have a strong mind on a member line.

• Proceedings of the Acoustical Society of Korea Conference
• /
• autumn
• /
• pp.111-114
• /
• 2000

지금까지 한국의 종소리가 긴 여운을 남기는 까닭은 서양 종과 달리 종의 하대 부분이 오목하여 종소리가 종 내부에 갇혀서 밖으로 빠져 나오지 못하고 오랫동안 휘돌아 치기 때문이라고 알려져 왔다 그러나 본 논문에서는 공기의 흐름을 차단하는 실험을 통해 긴 여운의 원리가 잘못 해석되고 있음을 밝히고자한다. 에밀레종은 구리판이 둥글게 말려져 있는 구조이고, 종의 하대로 갈수록 그 직경이 줄어든다. 이러한 둥근 링에서의 진동소리는 타종 부위의 상하좌우의 탄력운동에 의해 고유한 기본저음의 소리가 발생한다. 특히 진동은 당좌부위에서 하대방향으로 전달되어 공기 중으로 전파되는데, 하대로 갈수록 직경이 줄어들어서 하대의 둥근 링을 잡아주는 역할을 하기 때문에, 하대에서의 진동이 오래 동안 지속될 수 있다는 사실을 분명히 입증하였다.