• 한국소음진동공학회:학술대회논문집
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• 한국소음진동공학회 2013년도 추계학술대회 논문집
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• pp.844-845
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• 2013

• 정신신체의학
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• 제8권2호
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• pp.181-190
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• 2000

이 연구는 항공기 소음과 스트레스 수준 및 주관적 소음 인지도와의 상관성을 살펴보기 위하여, 항공기 소음 노출의 정도가 심하리라 예상되는 강릉공항에 인접한 입암동 및 학동 주민과, 대조군 송정동 주민 200명씩을 확률추출하여 전화설문을 수행하였다. 연구방법은 개인을 분석단위로 한 단면연구로 다중회귀분석 결과, 다른 모든 조사변수를 통제하여도 스트레스 수준과 소음으로 인해 생활에 지장을 받는다고 인지할 대응비가 입암동과 학동 주민이 송정동 주민에 비해 통계학적으로 유의하게 높았으며 중졸이하의 주민이 고졸학력의 주민에 비해 통계학적으로 유의하게 높았다. 이에 공항 주변 주민의 항공기 소음 폭로에 대한 지속적인 추적 및 보건관리와 보건교육, 정책 배려가 필요할 것으로 판단된다.

• 한국환경보건학회지
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• 제46권5호
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• pp.539-547
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• 2020

Objectives: This study was performed to emphasize improvement of the perception of dental hygienists' environmental working conditions by analyzing various factors. Methods: Two hundred ninety-eight female dental hygienists working at 35 medical institutions in Daegu City and Gyeongsangbuk-do Province participated. A self-recording type survey was done in October 2016. Results: Factors influencing the perception of infection control was length of career. Dental hygienists with more experience have a higher level of perception. Factors influencing the perception of working posture was the number of patients per day and career level. Dental hygienists seeing 50 or fewer patients per day and senior staff showed higher levels of this perception. Factors influencing the perception of noise in the working area were length of career and lunchtime break. The perception level was high in the group with longer careers and dental hygienists who rest at lunch time. Factors influencing chemical exposure during work were the number of patients per day and the type of institute. Dental hygienists working in dental clinics or dealing with more patients had lower levels of perception. Conclusions: The sociodemographic and working characteristics of dental hygienists influence the perception of dental hygienists' environmental working conditions.

• 대한전자공학회논문지SP
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• 제49권1호
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• pp.112-118
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• 2012

일상생활에서 음성안내 시스템을 이용한 안내 방송을 많이 접하게 되는데, 이러한 신호에 주변잡음이 추가되면 그 명료도가 떨어져서 이해하기가 곤란하다. 주변잡음은 항상 일정한 것이 아니라 시시각각 변화하는 불안정한 신호이다. 이렇게 불안정한 신호에 맞춰 출력신호를 조절하기는 어렵다. 본 논문에서는 백색소음 환경에서 잡음의 변화에 따라 음성안내출력신호를 적응적으로 변화시키는 방법을 제안하였다. 주변잡음은 열화된 방송신호에서 저장된 출력신호의 차로 구했다. 이 신호를 이용하여 신호대 잡음비를 추정하였으며, 음성안내레벨은 잡음의 변화에 따라 적응적으로 변하게 된다. 제안한 방법은 청자의 어음변별력을 향상시켜주며, 엠프의 에너지를 효율적으로 사용하는 장점이 있다.

• 한국소음진동공학회:학술대회논문집
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• 한국소음진동공학회 2002년도 추계학술대회논문집
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• pp.486-491
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• 2002

Auditory experiments based on subjective responses were undertaken for the standard heavy and light weight impact noise. Relations between noise levels and subjective evaluations were also investigated. As a result, it was shown that the noise class was rated with the range of sensible satisfaction by investigating the various social responses for the floor impact noise. The rate classification for the heavy weight impact noise is suggested as a design guide for concrete slabs which satisfy the residents' requirements in various sound insulation capacities of multistory residential buildings.

• 한국소음진동공학회:학술대회논문집
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• 한국소음진동공학회 2002년도 추계학술대회논문초록집
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• pp.354.1-354
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• 2002

Pitch is a perception related to frequency, one of the psychological aspects or attributes of tones, and an important factor to determine sound quality of sound together with loudness and timber. while a study on pitch has been actively achieved In the part of speech recognition and speech separation, that for analysis and improvement of product sound quality is not yet enough. (omitted)

• 한국소음진동공학회논문집
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• 제17권5호
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• pp.398-404
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• 2007

In this study, the sensitivity of annoyance was investigated by the subjective jury test for the variations of the frequency components along with various sound pressure levels of sixteen environmental noise sources. Annoyance was, also, evaluated for the road traffic noises. Sound pressure levels were $54{\sim}84\;dB$ which individually divided frequency components with eight bands of equally three bark bands. The results show that vehicle traffic noise is recognized as the most serious environment noise source. The sensitivity of human perception of annoyance in frequency bands is quite different from A-weighting curve. The annoyance found out to be more sensitive in high frequency region and reached its maximum in 3.4 kHz.

• Safety and Health at Work
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• 제2권3호
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• pp.260-272
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• 2011

Objectives: The promotion of health and safety (H&S) awareness among hospital staff can be applied through various methods. The aim of this study was to assess the risk level of physical hazards in the hospital sector by combining workers' perception, experts' evaluation and objective measurements. Methods: A cross-sectional study was designed using multiple triangulation. Hospital staff (n = 447) filled in an H&S questionnaire in a general hospital in Athens and an oncology one in Thessaloniki. Experts observed and filled in a checklist on H&S in the various departments of the two hospitals. Lighting, noise and microclimate measurements were performed. Results: The staff's perception of risk was higher than that of the experts in many cases. The measured risk levels were low to medium. In cases of high-risk noise and lighting, staff and experts agreed. Staff's perception of risk was influenced by hospital's department, hospital's service, years of working experience and level of education. Therefore, these factors should be taken into account in future studies aimed at increasing the participation of hospital workers. Conclusion: This study confirmed the usefulness of staff participation in the risk assessment process, despite the tendency for staff to overestimate the risk level of physical hazards. The combination of combining staff perception, experts' evaluation and objective measures in the risk assessment process increases the efficiency of risk management in the hospital environment and the enforcement of relevant legislation.

• Environmental Analysis Health and Toxicology
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• 제14권4호
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• pp.165-174
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• 1999

This study was conducted to analyze the priority of environmental problems in Korea by investigating the environmental professionals' perception. The delphi technique was applied to identify their risk perception towards some specific items related with pollution. A standardized questionnaire on environmental problems and their priorities was used to 74 subjects. In the questionnaire, the environmental problems were divided into the general ones,9 items, and the specific ones,30 items. Also, the perception was associated with two points of view which were the risk on general human health or ecosystem, and on the present situation in Korea. The priority of risk from general environmental problems on human health or ecosystem was analyzed in the order of 'water pollution', 'air pollution', 'soil contamination', 'waste', 'toxic chemical pollutants', 'food contamination', 'ocean contamination', 'odor pollution', and 'noise pollution'. The priority of risk on the present situation in Korea was analyzed in the order of 'water pollution','air pollution','waste','toxic chemical pollutants','food contamination','soil contamination','ocean contamination','odor pollution', and 'noise pollution'. And these priorities were significantly related with the characteristics of respondents such as sex, age, and major concerned area. However, for the first five priorities of risk from the specific environmental problems on human health or ecosystem, the environmental professionals agreed with 'automotive vehicle exhaust', 'domestic and industrial source pollutants to surface water', '$CO_2$nd g1oba1 warming effect','toxic air pollutant' and 'industrial source air pollution'. The priorities of risk on the present situation in Korea were similar to these results.

• 중환자간호학회지
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• 제8권1호
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• pp.41-49
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• 2015

Purpose: The purpose of this study was to measure the noise levels in intensive care units (ICUs) and to analyze the causes of the noise and patient perceptions of the noise. Methods: Noise levels were recorded in adult ICUs for 24 h over a week from the patients' bedside with a sound level meter. Noise sources were categorized into three groups: medical equipment, health care providers, and the environment. Noises from the environment were recorded in an empty ICUs side room. Perceptions of the noise of 125 patients admitted to the ICUs were recorded using a questionnaire. Results: The mean level of noise in the ICUs was 58.5 dBA (range: 34.2-80.2 dBA). The causes of noise higher than 70 dBA were nebulizers and infusion/syringe pumps among medical equipment, and drawer slamming, phone ringing, and stripping packages of medical fluids among environmental noises. According to the questionnaire, 64.0% of the patients responded that the ICUs were noisy and that they suffered from sleep disturbance because of the noise. Conclusion: Noise is considerably high in ICUs and is an annoying factor for the patients. Most noise sources are adjustable, and we should try to reduce noise whenever possible to make the ICUs environment more pleasant.