• Title/Summary/Keyword: Noise Survey

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A Study on Variables of Aircraft Noise Survey in Korea (국내 항공기 소음 성가심 조사 설계 시 고려해야 할 변수에 관한 연구)

  • Lee, Ki-Jung;Lee, Kun;Chang, Seo-Il;Son, Jin-Hee;Lee, Yeon-Soo
    • Proceedings of the Korean Society for Noise and Vibration Engineering Conference
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    • pp.742-749
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    • 2006
  • For the purpose of finding if aircraft noise annoyance response is affected to variables when noise survey is performed, the questionnaire survey is conducted around the Gimpo International Airport in Seoul, Republic of Korea. This residential area is exposed to the aircraft noise and road traffic noise, simultaneously. Research areas are classified according to three different aircraft noise exposure levels expressed in WECPNL, under 75, between 75 and 80, and above 80 WECPNL, on aircraft noise map. The 7-step numerical magnitude with verbal category scales is used to measure the annoyance level. This surrey suggests that aircraft noise annoyance is not affected to an important extent by other noise sources (road traffic noise, community noise) and demographic variables (sex, age, education, occupation, dwelling type, length of residence). Aircraft noise annoyance would be related to complaint activity which is one of attitudinal variables.

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Criteria for multiple noises in residential buildings uslng combined rating system (공동주택 생활소음의 통합 평가등급 설정)

  • Ryu, Jong-Kwan;Lee, Pyoung-Jik;Jeon, Jin-Yong
    • Proceedings of the Korean Society for Noise and Vibration Engineering Conference
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    • pp.367-371
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    • 2005
  • Social noise survey on multiple residential noises such as nut impact, air-borne, bathroom, drainage and traffic noises was conducted to investigate major variables affecting the overall satisfaction for noise environment The effect of individual noise perception on the evaluation of the overall noise environment was investigated through a questionnaire survey on annoyance, disturbance and noise sensitivity. Auditory experiments was also undertaken to determine noise level according to the percent of satisfaction for individual noise source. As a result of survey, it was found that satisfaction for floor impact noise most greatly affects the overall satisfaction for noise environment and annoyance most greatly affects the satisfaction for individual noise sources. Result of auditory experiment showed that the noise level of floor impact noise by bang machine, airborne, drainage and traffic noise corresponding to 50% satisfaction is 44dB($L_{i,Fmax,AW}$) and 40dBA, respectively.

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Classification of Noise Insulation Performance in Apartment Buildings through Noise survey and Auditory Experiment (설문조사와 청감실험을 통한 공동주택 차음성능의 평가등급 설정)

  • Ryu, Jong-Kwan;Jeon, Jin-Yong
    • Proceedings of the Korean Society for Noise and Vibration Engineering Conference
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    • pp.666-669
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    • 2005
  • Social noise survey and auditory experiment on residential noises such as floor impact, air-borne, bathroom, drainage and traffic noises were conducted to classily a noise insulation Performance in apartment building. The survey results showed that annoyance among subjective responses to residential noises was most greatly affecting to satisfaction with noises. In the survey, boundary limit between satisfaction and dissatisfaction was also determined. Auditory experiments was also undertaken to determine noise insulation performance according to the percent of satisfaction for individual noise source. Result of auditory experiment showed that the noise insulation performance for floor impact, airborne, drainage and traffic noise corresponding to 40 % satisfaction is 49 dB (L$_{i,Fmax,AW}$), 48 dB (R'w), N-41, and N-40, respectively. Finally, classes of noise insulation performance in apartment building were proposed according to satisfaction with noises

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A Study on the Noise Survey and Abatements of Public Libraries in Daegu City (공공도서관 소음조사 및 저감방안 연구 - 대구지역을 중심으로 -)

  • Yoon, Hee-Yoon
    • Journal of Korean Library and Information Science Society
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    • v.48 no.1
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    • pp.1-20
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    • 2017
  • Public library is the most well-used cultural infrastructure, life-long learning space, and social facility within local community. In order to respond to the multi-purpose identities, space structure of many public libraries is changed or reconstructed to open-concept, multi-functional and interconnected areas. Accordingly, the noise issue in public libraries has emerged as one of key environmental parameters and noise management is bound to be considered as a scale for determining whether a user-friendly library. This study measured the noise level of the public libraries in Daegu city, analyzed measurement results on the basis of national and international standards, and suggested the various reduction plans.

A Study on the Effect of Variables on Aircraft Noise Annoyance Response (항공기 소음 성가심 반응에 영향을 미치는 변수에 관한 연구)

  • Lee, Ki-Jung;Lee, Kun;Chang, Seo-Il;Son, Jin-Hee
    • Journal of Korean Society of Environmental Engineers
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    • v.29 no.3
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    • pp.341-347
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    • 2007
  • For the purpose of finding how aircraft noise annoyance response is affected by variables when noise survey is performed, the questionnaire survey is conducted around the Gimpo International Airport in Seoul, Republic of Korea. This residential area is exposed to the aircraft noise and road traffic noise, simultaneously. Research areas are classified according to three different aircraft noise exposure levels expressed in WECPNL, under 75, between 75 and 80, and above 80 WECPNL, on aircraft noise map. The 7-step numerical magnitude with verbal category scales is used to measure the annoyance level. This survey suggests that aircraft noise annoyance is not affected to an important extent by other noise sources(road traffic noise, community noise) and demographic variables(sex, age, education, occupation, dwelling type, length of residence).

High Voltage Resonant DC-DC Converter Design for X-Ray Imaging (X-Ray 진찰용 고전압 공진형 DC-DC 컨버터 설계)

  • Baek, Jong-Mu;Joo, Hae-Jong;Cho, Moon-Taek;Lee, Chung-Sik
    • Journal of the Korean Society of Radiology
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    • v.4 no.4
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    • pp.11-16
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    • 2010
  • In this paper, including the X-ray high voltage resonant inverter generators and high frequency high voltage transformer operating systems is proposed. X-ray generator removes the noise and was smaller, 50[kHz] to work more with the driving frequencies, and that occurred when the normal power supply available due to noise, survey the conditions and solve the problems of the poor was a problem. In addition, X-ray tube voltage, frequency controllers and tube current controller filament heating voltage transformer for high frequency transformer design and manufacture of doing X-ray devices were to become more efficient operation.

Demographic and Attitudinal Factors that Modify Annoyance from Aircraft Noise (항공기 소음 성가심 반응에 영향을 미치는 변수에 관한 연구(II) - 김포공항 주변 거주민을 대상으로 -)

  • Son, Jin-Hee;Lee, Kun;Chang, Seo-Il
    • Journal of Korean Society of Environmental Engineers
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    • v.29 no.12
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    • pp.1366-1370
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    • 2007
  • For the purpose of finding how the annoyance response to aircraft noise is affected by non-noise variables, the questionnaire survey is conducted around the Gimpo International Airport in Seoul, Korea. The non-noise variables used in this research are divided into two categories; demographic and attitudinal variables. The result of the survey suggests that aircraft noise annoyance is not affected to an important extent by other noise sources(e.g., road traffic noise and community noise etc.) and the demographic variables (sex, age, education, occupation, dwelling type and length of residence). It has been found that it is affected to an important extent by the attitudinal variables such as complaints.

Survey and Evaluation for Exterior Noise of a High Rise Apartment in Seoul (서울시 초고층 아파트의 외부소음 측정과 평가)

  • Lee, Seon-Dong;Park, Yu-Ra;Lee, Sang-Woo;Yoo, Ho-Chun
    • KIEAE Journal
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    • v.4 no.3
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    • pp.95-101
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    • 2004
  • As a part of acoustical design, it is often necessary to quantify aspects of an existing environment and to predict the result of adding an acoustical treatment. The most common sources of exterior noise, also termed as environmental noise,(or community noise) are traffic noise, air craft noise, industrial noise, etc. Transportation(air, road, and rail)noise is the dominant and most common source of noise exposure in residential neighborhoods, and the annoyance is its most consequential effect. The road traffic noise becomes aggravated due to the rapid increase of vehicles. It has a great effect on the dwelling environment. Therefore we investigate the characteristics and sources of the road traffic noise through grasping the status of the road traffic noise. In the present study, preceding studies investigated the noise level of urban areas in Seoul were reviewed and the noise level of urban areas in Seoul was measured at first, fifth, tenth, and nineteenth floor for two days of weekdays and two days of weekend.

Study on Adequate Positioning of Environmental Noise Automatic Measuring System in Busan (부산시 환경소음 자동측정망 설치위치의 적정성에 관한 연구)

  • Kim, Hwa-Il;Han, Kyoung-Min
    • Journal of Environmental Policy
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    • v.8 no.1
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    • pp.31-48
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    • 2009
  • To install and operate the Automatic Noise Monitoring Networks reasonably, which able to monitoring environmental noise continually, is an important issue for making decision to urban environment. Noise level is determined by regional environmental factors, that affected by complex urban environment. Therefore, accurate measurement of environmental noise level has top priority to establish and promote appropriate environmental policies. Currently, Automatic Noise Monitoring System is installed for grasping the environmental noise level and preparing basic data for constructing noise-reduction policies. However, this measurement data is recognized not to be able to reflect a sensory noise. The main reason is the lack of reliable measurement data and unreasonable installation site. The main point of this research ought to be the analysis of installed site of noise monitoring system in Busan.

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