• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 2012.06a
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• pp.452-454
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• 2012

현대 기술의 발전에 따라 다양한 항해 장비들이 개발되고 있으나, 인적 오류에 의한 해양사고는 지속적으로 발생하고 있다. 인적 오류에 의한 해양사고는 항해사의 상황 인지오류 또는 현상 착각 등 많은 상황에서 일어나고 있다. 선교에는 각종 항해 장비로부터 나오는 많은 물리적 음향 신호들이 존재하며, 위험을 전파하는 경보음은 항해사에게 위험상황을 정확하게 전달하지 못하고 있는 실정이다. 따라서 본 연구에서는 경보음을 항해사가 직관적으로 인지할 수 있는 선교경보관리시스템의 경보음 개발을 위한 연구를 실시하였다. 연구를 위해 기존에 선교에서 사용하는 경보음에 대해 음향학적 분석을 수행하였으며, 음성 경보음과 청각아이콘을 활용한 경보음 개발에 대한 실험적 연구를 수행하였다. 그리고 현재 해양연구원에서 제작한 선교경보관리시스템(BAMS)을 간략히 소개하고자 한다.

• Proceedings of the Safety Management and Science Conference
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• 2013.04a
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• pp.409-420
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• 2013

본 연구에서는 인천광역시의 37개 사업장(공장)을 대상으로 작업현장의 소음을 측정 및 분석하여 소음이 화재경보음 인지에 미치는 영향을 분석하였다. 측정결과 평균소음이 95.8dB(A)나왔다. 이는 국내 경보장치 음량기준(화재경보음 발생장치에서 1m떨어진 곳에서 90dB이상)보다 5.8dB(A)높게 나왔다. 미국방화협회(NFPA)에 따르면 암소음(기기음)이 85dB(A)이거나 이상일 경우 화재경보음 인지정도가 미흡하기 때문에 다른 방법을 강구하도록 되어 있다. 또한 화재경보음은 암소음보다 15dB(A) 높아야 한다고 하고 있다. 따라서 주변의 환경을 무시한 획일적인 화재경보음 설계에 대해서 제도적 및 법적 개선이 필요하다고 사료된다.

• Fire Science and Engineering
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• v.33 no.4
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• pp.89-96
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• 2019

In this study, alarm sound generated as a priority alert system propagation through an elevator shaft in apartment buildings were simulated using room acoustic simulation software. The simulations were conducted on three kinds of elevator hall plan with a different number of elevators and placement. First, the elevator shaft without sound absorption material was simulated as a condition of the present. When the distance from the alarm sound generating floor became farther, alarm sound level was decreased. However, the alarm sound level three-floor distance was about 54 dB(A)~56 dB(A) which were louder than a background sound level of typical apartment buildings. Sound absorption material placement proposed by previous studies were simulated and the alarm sound levels were decreased about 12 dB~16 dB. These levels were similar or lower than the background level of apartment buildings. From these results, it can be concluded that placing sound absorption material on the surface of the elevator shaft wall can be one of the methods to control the alarm sound as regulated in NFSC.

• Proceedings of the Korea Information Processing Society Conference
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• 2015.10a
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• pp.1078-1079
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• 2015

본 논문에서는 신호 시제 논리 명세를 통하여 민방위 경보음을 정형적으로 명세한다. 논리를 기반으로 한 정형 명세는 비정형 명세에 비하여 분명하고, 간결하며, 기계처리가 가능한 이점을 제공한다. 민방위 경보음에 대한 시간의 흐름에 따른 주파수의 변화를 그래프로 그린 후에 이를 신호시제 논리로 명세하고자 한다.

• 대한방사선방어학회:학술대회논문집
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• 2009.04a
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• pp.296-297
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• 2009

• Electric Engineers Magazine
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• v.230 no.10
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• pp.34-39
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• 2001

경보 음이 울리고 적색 램프들이 깜박이고 배전반 감시원들은 계통사고를 수습하느라 한 동안 소란스럽다. 경보음들을 끄고, 경보 표시등에 내용을 확인 기록하고 복귀시킨 후 가장 급한 선로부터 전력을 다시 공급하기 위하여 차단된 차단기를 순서대로 투입하고 고장의 진원 계통만 분리하여 고장구간을 최소화한다.

• Fire Science and Engineering
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• v.32 no.3
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• pp.67-75
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• 2018

To reduce the number of casualties in the case of fire, an alarm sound needs to be delivered to the people who remain in the apartment unit. On the other hand, it was reported that the fire alarm sound generated in the elevator hall was not delivered sufficiently to the people staying in the apartment units. In this study, the background noise level and noise level generated in an apartment unit were measured during the day and night time. In addition, the transmission of the fire alarm sound into the each room of apartment units was simulated and compared with the background noise level. The fire alarm sound generated in the elevator halls was reduced by the fire door and doors, and was not transmitted sufficiently into the internal spaces of the apartment units. Starting evacuation action was difficult after hearing the fire alarm sound generated outside the apartment units. To improve the transmission of an alarm sound to the inner spaces of apartment units, an acoustic simulation was carried out for cases where the alarm sound generator was installed on a wall-pad in the living room and the alarm sound generator was installed on the ceiling of each rooms in apartment units. Background noise of + 15 dB and 75 dB (A) were satisfied when alarm sound generator was installed on the ceiling of each room.

• The Journal of the Convergence on Culture Technology
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• v.9 no.1
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• pp.153-160
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• 2023

This research experiments on the workers' recognition of the fire alarm sound for sirens and portable loudspeakers in a small construction site. As a result of analyzing the siren alarm sound recognition from measuring on the 1st, 2nd, and 4th floors, the sound was more unrecognizable on the 4th floor than on the 1st, and 1 person on the 1st floor was unable to recognize all sounds. In the case of the 2nd floor, one person could not notice the alarm in the last 3rd trial, and another did not realize it all three times. For the 4th floor, 3 people demonstrated unrecognition in all 3 tests. As a result of analyzing the recognition of portable loudspeaker alarm sounds, 1 person could not recognize all sounds on the first floor. In the case of the 2nd floor, 2 people were confirmed to be unable to notice, and lastly, 4 people could not recognize all trials on the 4th floor. The subjects who didn't recognize the sound were unable to distinguish between portable loudspeaker alarm sound and work noise due to the workspace and obstacles.

• Electric Engineers Magazine
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• v.228 no.8
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• pp.8-13
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• 2001

대부분의 실용적인 도난 경보 시스템은 어떤 종류의 시간 지역 특성을 필요로 한다. 시간 지연 특성이 없는 도난 경보 시스템은 보호 구역에 접근하는 사람이 심지어 자기 자신 일지라도 경보음을 울리게 될 것이다. 하지만 만약에 우리가 외출을 하려고 할 때 만약 경보가 해제되어 있다면 외출하면서 우리자신이 경보 장치를 설정하고 나가는 수 밖에 없는데 이 경우 경보를 설정할 수 있는 방법이 없다.

• Fire Science and Engineering
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• v.23 no.5
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• pp.153-160
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• 2009

This study aims to review the propagation characteristics of fire alarm sound in building through computer simulation. In order to achieve this goal, the sound power level of existing three different emergency alarms were measured in an anechoic chamber. Sound power level of alarm bell was 98.6dB and electronic-siren speaker was 95.7dB, and electronic-siren phon was 101.8dB at the voltage of DC 24V in the condition of anechoic chamber. As the results of acoustic simulation, it was shown that sound levels at the corridor of the building were relatively high and even. But, there were large difference in sound level at all the frequency bands between corridor and lecture rooms. This mean that alarm sound couldn't be recognized sometimes in lecture rooms. Through the computer simulation, the propagation characteristics of fire alarm sound could be forecasted and compared due to plans of buildings.