교회규모에 따른 음향성능 조사분석

한찬훈,이세나,이환희 충북대학교 건설기술연구소 2002 建設技術論文集 Vol.21 No.1

In planning churches, not only the size and shape but also the acoustical environment of room are important. The church services are normally made by sound and visual activities and, especially as for modern protestant churches, the importance of the annual environment gets bigger. Meanwhile, the present study investigates the architectural specifications and room acoustic properties of several churches which have different size and shape, and compares the acoustic properties of church halls. And alternative solution were suggested to improve acoustic performance. The data occupied during the study can be used in the acoustic planning of church. In this study, architectural data such as room measures, finish material, volume and reverberation time were gathered from different five churches. Though the computer simulations sound pressure level(SPL), reverberation time(RT), clarity(C80), definition(D50), rapid sound transmission index(RASTI) of each church halls were calculated and analyzed to compare the acoustic characteristics. Through the analyses some proper design were considered with respect to size and shape. Normally, it was found that big churches have tendency of low sound pressure level and long reverberation time, but the material and shape tended to give change on SPL and RT. And it is found that large churches need to have support of electrical PA system as well as acoustical planning through architectural shape and material.

청주향교 명륜당의 실내음향특성 조사분석

성명제, 한찬훈 충북대학교 건설기술연구소 2008 충북대학교 건설기술연구소 논문집 Vol.27 No.1

The present study aims to investigate the styles of traditional classrooms and to discover the acoustic characteristics of the classroom. Acoustic experiments were undertaken at the Myoung Ryun Dang at the Cheongju Hyang-gyo which have typical style of the traditional classroom of Korea. The background noise level is about 37.3dB that is unsuitable for educational spaces. It is because lots of noise is coming from the outside. Several acoustic parameters were measured at 12 points including sound pressure level (SPL), reverberation time(RT), definition(D50) and speech intelligibility(RASTⅠ). It was found that SPL is reducing rapidly in proportion with the distance away from the sound source. The average value of RT is 0.75 second when classroom was empty which means the appropriate condition for speech. The average D50 value is a 0.60 that is regarded as suitable condition. The average RASTⅠ is 0.66 which is a value of satisfactory level. The result shows that Myoung Ryun Dang has good acoustic conditions with short reverberation time and high clarity in spite of the noises.

건물의 화재위험관리에 관한 실태조사

김홍배,김옥규,한찬훈 충북대학교 건설기술연구소 2002 建設技術論文集 Vol.21 No.1

It is getting more important to obtain safety and comfort in buildings. Due to the economic development and the change in life style, various criteria such as human life as well as the means of wealth and social infrastructure should be protected against fire risks. The present study aims to survey the fire protection facilities of multi-dwelling residence, office and commercial buildings. The fire evacuation plan of buildings were analyzed and the defected fact with high fire risks were evaluated. Also a method to minimize the lost from fire was suggested and practical fire alarm an fire detection plan were also commented.

Comparison of Predicted Acoustics with the Measured Acoustic Properties of a Multi-Purpose Hall

Haan, Chan-Hoon The Acoustical Society of Korea 2006 韓國音響學會誌 Vol.25 No.e3

The present study presents the design procedures and the acoustic properties of the main hall of Ansan Cultural Arts Center in Korea which has opened in 2004. The acoustic design values are compared with the measured acoustic properties of the completed multi-purpose hall. Acoustic design criteria were suggested in the design stage through the 3-dimentional computer simulations. The acoustic parameters including SPL, RT, C80, $D_{50}$M, RASTI were measured in the hall after completed. Acoustic measurements were carried out in the 40 measurement points using MLS sound source signal in 4 different sound source points. The results show the even distribution of sound levels within the 2.0dB of difference among all seats. The reverberation time of 1.66sec was measured which is similar to the objective value of 1.65 sec in empty states. It was also found that average C80 values lie in the objective extents of C80 from -1 to 3dB and average D50 value of 54 was measured. Thus, it is concluded that the hall can be used as a multi-purpose hall with a suitable acoustic conditions.

초등학교 교실의 음환경 평가에 관한 실험적 연구

한찬훈(Haan, Chan-Hoon),문규천(Moon, Kyu-Chun) 한국교육시설학회 2004 敎育施設 Vol.11 No.1

Since 1990s in Korea, elementary school classrooms have been designed toward open education system in pursuit of variety of educational purpose. Also, the architectural designs of schools have been acomplished for individual school not based on the standard design code. The present paper aims to investigate the acoustic environment of existing classrooms and to compare the sound insulation capacity between the ordinary classrooms and the newly built classrooms for open education. The current acoustical situation of elementary classrooms was analyzed using field measurements and questionnaire survey. In order to this, Three elementary schools were selected which were built in 1978, 1996 and 2000 respectively. Room acoustical parameters including Reverberation time(RT), Definition(D50), Speech Intelligibility(RASTI), Transmission loss(TL) and STC were measured in a classroom in each elementary school classroom. Each measurement was undertaken with the windows and doors being open or closed. As the result, it was found that the transmission loss between rooms in open classrooms is, in average, inferior than the ordinary classrooms. The RASTI of 0.70 was measured in newly built classrooms which is better than old classrooms(0.70) and open classrooms(0.73). This was shown as same in the speech definition measurements. This results from the condition of sealing and airtightness of classrooms and floor materials. The results denote that open classrooms have poor acoustic condition in sound insulation and speech intelligibility.

[발언과 논평] 문화건축물의 외형적, 내재적 가치

한찬훈(Haan, Chan Hoon) 대한건축학회 2016 建築 Vol.60 No.10

초등학교 교실의 실내음환경 비교조사

한찬훈 ( Chan Hoon Haan ) 충북대학교 건설기술연구소 2005 建設技術論文集 Vol.24 No.2

아동행동에 따른 중량바닥충격음 레벨 비교

한찬훈 ( Haan Chan-hoon ),김건수 ( Kim Geon-su ) 충북대학교 건설기술연구소 2023 建設技術論文集 Vol.42 No.2

본 연구의 목적은 공동주택에서 발생하는 주요한 층간소음 원인인 아동의 행동에 따른 바닥충격음을 조사하는 것이다. 현재 뱅머신과 고무공충격원dl 바닥충굑음의 중량표준바닥충격음원으로 사용되고 있다. 따라서, 아동의 행동에 따른 실제바닥충격음과 표준바닥충격음원으로 측정된 소음레벨과 비교함으로서, 보다 현실적이고 정확한 평가방법을 제시하고자 한다. 이를 위하여 경기도 A시의 E단지내 2가구를 선정한 후 7세 24Kg 이상인 남자아이를 대상으로 현장실험을 실시하였다. 모든 측정은 KS F2810-1과 KS F2810-2에 따른 바닥충격음 차단성능 현장측정 방법에 따라서 수행되었다. 현장 층간소음 실험시 아동행동유형은 뛸 때, 걸을 때, 뛰어 내릴 때, 뒹굴 때 등 4가지로 분류하였으며, 이 분류한 행동유형을 세부적으로 속도별, 걸음의 유형별, 높이별, 지속시간별로 나누어 실험하였다. 실험 결과 중량충격음과 비교했을 때 뛸 때와 뒹굴 때는 저주파수에서 5dB이상 차이나는 반면, 뛰어내릴 때는 5dB이하 차이나는 것을 통해 뛰어 내릴 때는 표준중량충격원과 비슷하지만 나머지 행동유형은 더 낮은 저주파수대역의 충격음원이 필요하다고 생각한다. 따라서 아이의 행동을 세밀하게 분석한 뒤 더 폭넓은 중량충격원에 대한 연구가 필요하다. The present study aims to investigate the real floor impact noises caused by children’s various actions inside the apartment housing. Currently, bang machine and impact ball are used as the standard heavy-weight floor impact sound sources, to evaluate the floor impact noises. So, measured floor impact noise data obtained by both children and reference sound sources could be very important for the more accurate and reliable evaluation of the current floor impact noises. In order to this, two vertically connected households were selected for the field acoustic experiments and a child of 7 years old participated in the measurements as a subject. All the acoustic field measurements were carried out following the standards (KS F2810-1 and KS F2810-2). Four typical behaviors of children were acted in a living room including walking, running, jumping and rolling on the floor. As a result, it was found that the measured noise levels by child’s behaviors are different from the noise levels from standard floor impact sound sources from 1dB up to 5dB when child ran and rolled. Also, it was revealed that standard floor impact sound sources make lower sound levels than the noise levels by child’s jumping at 64Hz where, the critical heavy-weight floor impact sound frequency. Thus, it could be concluded that more reliable floor impact sound sources should be considered which can represent the real condition of floor impact noises occurrence in current apartments

서구 고대 야외극장의 유형분석과 음향적 고찰 -그리스 로마 야외극장을 중심으로-

한찬훈 ( Chan Hoon Haan ),김예지 ( Ye-ji Kim ) 충북대학교 건설기술연구소 2020 建設技術論文集 Vol.39 No.2

오늘날 극장과 공연장의 원형이 되는 고대 그리스 로마 시대의 야외극장은 그 시대별로 형태가 달라진다. 현재 지중해 연안에 남아있는 고대 그리스와 로마시대의 야외극장을 비교분석한 결과 크게 무대와 객석의 변화를 알 수 있었다. 본 노문은 고대 그리스 로마 시대의 야외극장의 형태와 재료의 관점에서 건축적으로 변화되는 양식을 조사하였다. 그리스 시기에는 오케스트라가 무대가 되었지만 점차 로마시대로 갈수록 오케스트라의 기능이 약해지고 스케네와 프로스케니온이 그 역할을 대신하였다. 또한 시간이 갈수록 객석의 변화 또한 방사형에서 부채꼴형, 반원형, 원형의 형태로 변모하였는데, 이는 종교적인 특색이 약해지고 다목적으로 극장의 성격이 달라졌기 때문이다. 또한, 오직 건축적인 요소로 수많은 관중에게 말과 소리가 잘 전달되게 한 그리스 로마시대의 야외극장의 음향적인 역할과 기능을 조사하였다. 오늘날까지 남아있는 많은 야외극장을 조사한 결과, 세가지의 건축음향적인 요소를 발견하였다. 그것은 음향에너지의 많은 부분을 객석으로 보내기 위한 약 26o 전후의 가파른 객석의 기울기와, 후반기에 나타난 무대 뒤편에 거대한 돌벽, 그리고, 벽체와 객석단의 아래에 묻혀 있었던 공명항아리를 들 수 있다. 이러한 사실은 고대 그리스와 로마시대의 야외극장에서 음향적인 요소가 가장 중요하고 필수적인 요소였다는 것을 암사하고 있다. 이러한 변화는 야외극장의 본연의 기능인 소리의 전달을 위한 것으로서, 곧 현재의 극장과 공연장 건축에 영향을 주었다. The amphitheater of the ancient Greek and Roman period is the beginning of today's performance culture and theater, and its forms vary from one period to the next. Ancient Greek and Roman amphitheaters currently remain on the Mediterranean coast, and a comparative analysis of them showed changes in stage and attendance. The present study aims to investigate the architectural transition of Greek and Roman amphitheaters with a view points of the shape and materials. During the Greek period, the orchestra became the center of the stage while the orchestra's functions became weak, and Skene and Proskenion substitute the orchestra in Roman era. The seat layouts were also changed from radial-shaped to fan-shaped, semi-circular and circular shapes as time passes since the major purpose of the amphitheaters was moved from the religion to multi-purposes. Acoustical role of the ancient Greek and Roman amphitheater was also investigated which enables the transmission of the speech and sound to the huge number of audience with only architectural elements. Through the analyses of many amphitheaters which remain today, it was found that there are mainly three architectural elements for acoustical consideration such as very steep rake angle around 26o of the audience floor, big stone walls which stand behind the stage, and the resonant jars which were installed on the wall and beneath the step floor. The results denote that acoustical elements are very important factors of the ancient amphitheaters which are basic essential for the theatres themselves. It is also connected to the sound of the modern theaters and has affected the current style of theaters and the concert halls.

차종별 속도가 도심 소음도에 미치는 영향

한찬훈 ( Haan Chan Hoon ),채세원 ( Chae Se-won ),권도인 ( Kwon Do-in ) 충북대학교 건설기술연구소 2022 충북대학교 건설기술연구소 논문집 Vol.41 No.2

최근 교통량이 증가함에 따라 도로교통소음이 증가하고 있다. 다양한 인자 중 도로교통소음을 유발하는 가장 큰 인자는 교통량이라고 알려져 있다. 본 연구의 목적은 다양한 도로교통소음 측정을 통해 도심 소음에 영향을 미치는 여러 인자를 조사하는 것이다. 이를 위해 주·야간을 포함한 3개 시간대 동안 도시 지역의 약 90개 지점에서 소음도를 측정하였다. 또한, 소음인자를 분석하기 위해 도시 도로의 교통량, 차량의 종류 및 주행속도 등을 측정하여 기록하였다. 모든 차량은 승용차, 버스, 트럭, 오토바이크의 4개 종류로 분류되었다. 그 결과, 차량의 속도뿐만 아니라 승용차 외의 특정 차종의 유입이 소음도에 큰 영향을 미치는 것으로 나타났다. 따라서 도심소음도는 교통량보다 차량의 주행속도와 더 밀접한 관련이 있는 것으로 사료된다. 특히 특정 차종인 오토바이크, 버스, 트럭의 주행속도가 도심 소음도에 가장 큰 영향을 미치는 요인으로 분석되었다. Road traffic noise has been raised due to the increasing traffic volumes in recent years. It has been acknowledged that traffic volume is the largest factor that causes road traffic noise among various factors. The present study aims to investigate the several factors which affect urban noises by measurement of road traffic noises in various ways. In order to do this, noise levels were measured at 90 points in urban area during three time zones including day and night. Also, noise levels, traffic volume and the speed of moving vehicles were measured on the urban roads and recorded for the analysis of noise factors. All the vehicles were classified into 4 categories such as car, bus, truck and auto-bikes. As a result, it was found that the noise level was significantly influenced by not only the speed of vehicles but also influx of the specific vehicle types except cars. Therefore, it could be discussed that the urban noise level is more closely related to the vehicle speed than the traffic volume. Also, especially, it is concluded the speed of specific vehicle types including auto-bikes, buses, and trucks are the most influential factor of the urban noise levels.