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Thu Nguyen
Department of Architectural Design, Interdisciplinary Faculty of Science and Engineering, Shimane University, Shimane 690-8504, Japan

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Journal article
Published: 09 June 2021 in International Journal of Environmental Research and Public Health
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Since the development of the 5-point verbal and 11-point numerical scales for measuring noise annoyance by the ICBEN Team 6, these scales have been widely used in socio-acoustic surveys worldwide, and annoyance responses have been easily compared internationally. However, both the top two categories of the 5-point verbal scale and the top three ones of the 11-point numerical scale are correspond to high annoyance, so it is difficult to precisely compare annoyance responses. Therefore, we calculated differences in day–evening–night-weighted sound pressure levels (Lden) by comparing values corresponding to 10% highly annoyed (HA) on Lden_%HA curves obtained from measurements in 40 datasets regarding surveys conducted in Japan and Vietnam. The results showed that the Lden value corresponding to 10% HA using the 5-point verbal scale was approximately 5 dB lower than that of the 11-point numerical scale. Thus, some correction is required to compare annoyance responses measured by the 5-point verbal and the 11-point numerical scales. The results of this study were also compared with those of a survey in Switzerland.

ACS Style

Makoto Morinaga; Thu Nguyen; Shigenori Yokoshima; Koji Shimoyama; Takashi Morihara; Takashi Yano. The Effect of an Alternative Definition of “Percent Highly Annoyed” on the Exposure–Response Relationship: Comparison of Noise Annoyance Responses Measured by ICBEN 5-Point Verbal and 11-Point Numerical Scales. International Journal of Environmental Research and Public Health 2021, 18, 6258 .

AMA Style

Makoto Morinaga, Thu Nguyen, Shigenori Yokoshima, Koji Shimoyama, Takashi Morihara, Takashi Yano. The Effect of an Alternative Definition of “Percent Highly Annoyed” on the Exposure–Response Relationship: Comparison of Noise Annoyance Responses Measured by ICBEN 5-Point Verbal and 11-Point Numerical Scales. International Journal of Environmental Research and Public Health. 2021; 18 (12):6258.

Chicago/Turabian Style

Makoto Morinaga; Thu Nguyen; Shigenori Yokoshima; Koji Shimoyama; Takashi Morihara; Takashi Yano. 2021. "The Effect of an Alternative Definition of “Percent Highly Annoyed” on the Exposure–Response Relationship: Comparison of Noise Annoyance Responses Measured by ICBEN 5-Point Verbal and 11-Point Numerical Scales." International Journal of Environmental Research and Public Health 18, no. 12: 6258.

Journal article
Published: 19 April 2021 in International Journal of Environmental Research and Public Health
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There have been many arguments about findings of an increase in noise annoyance over time and a recommendation of stricter limits on aircraft noise levels to protect the health of residents around airports. It is crucial to examine if the established exposure–response relationship is suitable for designing future aircraft noise regulations. This study was focused on identifying changes in response to noise over time by comparing community responses from two surveys conducted in 2008 and 2019 at Tân Sơn Nhất (TSN) international airport. Annoyance was found to significantly reduce in 2019 compared to 2008; however, changes in sleep quality were relatively small. Unexpectedly, a gradual increase in the annoyance due to aircraft noise was not found. Results of multiple regression analysis indicated that differences in the reaction of the residents to noise in the two studies were significantly attributed to nonacoustic factors. Noise sensitivity and dissatisfaction with the living environment (e.g., inconvenience in accessing workplace) considerably affect noise annoyance, whereas noise sensitivity, age, and dissatisfaction with the green environment of living areas affect sleep quality. These findings suggest the fulfillment of desired living environment as effective measures for mitigating noise impacts on residents in the vicinity of busy airports.

ACS Style

Bach Trieu; Thu Nguyen; Yasuhiro Hiraguri; Makoto Morinaga; Takashi Morihara. How Does a Community Respond to Changes in Aircraft Noise? A Comparison of Two Surveys Conducted 11 Years Apart in Ho Chi Minh City. International Journal of Environmental Research and Public Health 2021, 18, 4307 .

AMA Style

Bach Trieu, Thu Nguyen, Yasuhiro Hiraguri, Makoto Morinaga, Takashi Morihara. How Does a Community Respond to Changes in Aircraft Noise? A Comparison of Two Surveys Conducted 11 Years Apart in Ho Chi Minh City. International Journal of Environmental Research and Public Health. 2021; 18 (8):4307.

Chicago/Turabian Style

Bach Trieu; Thu Nguyen; Yasuhiro Hiraguri; Makoto Morinaga; Takashi Morihara. 2021. "How Does a Community Respond to Changes in Aircraft Noise? A Comparison of Two Surveys Conducted 11 Years Apart in Ho Chi Minh City." International Journal of Environmental Research and Public Health 18, no. 8: 4307.

Journal article
Published: 13 February 2021 in Sustainability
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Expanding transport systems for life convenience and preserving the natural environment are essential but conflicting human activities. The operational expansion after the opening of a new terminal building at Hanoi Noi Bai International Airport was followed by changes in aircraft noise exposure. A series of socio-acoustic surveys were conducted around the airport, revealing different levels of noise annoyance responses in the surveyed sites. To clarify this discrepancy and to explore people’s true feelings, the Picture-Frustration test was conducted to assess attitudes toward the airport, aircraft noise, living environment, and awareness of environmental protection in the communities around the airport. A total of 321 responses were obtained. The results showed a significant variation in attitudes toward the airport and natural environment among residents in different areas. Urban residents preferred natural environment more than those living in rural and mixed sites, who desired harmony between nature and life convenience. Residents in rural sites raised more complaints about aircraft noise effects on sleep than those in the other sites. Factors of occupations and gardening activities did not affect residents’ attitudes toward the airport. The attitudes of the participants varied depending on the exposure noise levels. It was suggested that using multiple questioning methods is necessary to certify the true opinions and aspirations of people living in the project area and ensure sustainable development.

ACS Style

ThuLan Nguyen; Sonoko Kuwano; Ichiro Yamada; Takashi Yano; Makoto Morinaga. Picture-Frustration Test to Assess Environmental Attitudes of Residents Exposed to Aircraft Noise from Hanoi Noi Bai International Airport. Sustainability 2021, 13, 2016 .

AMA Style

ThuLan Nguyen, Sonoko Kuwano, Ichiro Yamada, Takashi Yano, Makoto Morinaga. Picture-Frustration Test to Assess Environmental Attitudes of Residents Exposed to Aircraft Noise from Hanoi Noi Bai International Airport. Sustainability. 2021; 13 (4):2016.

Chicago/Turabian Style

ThuLan Nguyen; Sonoko Kuwano; Ichiro Yamada; Takashi Yano; Makoto Morinaga. 2021. "Picture-Frustration Test to Assess Environmental Attitudes of Residents Exposed to Aircraft Noise from Hanoi Noi Bai International Airport." Sustainability 13, no. 4: 2016.

Journal article
Published: 20 April 2020 in Urban Science
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Many decibel-based noise indicators are used in noise policy to evaluate aircraft sound in the environment. Among those, day–evening–night-weighted sound pressure level ( L den ), day–night-weighted sound pressure level ( L dn ), and nighttime average sound pressure level ( L night ) are the most widely used. However, the designation of reference time intervals (e.g., day, evening, and night) differs depending on the country’s lifestyle and culture. A dataset—extracted from socio-acoustic surveys conducted in Vietnam (2005–2019)—was analyzed to investigate temporal patterns of the Vietnamese lifestyle and changes in L den , L dn , and L night when temporal interval segmentations in these indicators were adjusted. Traffic congestion hours, go-to-bed time, and wake-up time in southern Vietnam were approximately one hour later than those in northern and central Vietnam. Further, a small-scale and Internet-based questionnaire survey on Vietnamese life rhythms was conducted to examine Vietnamese people’s daily behaviors. These data were compared with the relevant data of Japanese individuals, extracted from the Survey on Time Use and Leisure Activities of Japan. Differences in sleeping times and mealtimes were found between Japanese and Vietnamese data. We suggest an appropriate reference time interval for aircraft noise policy in Vietnam, referring to the current national and international noise standards and regulations.

ACS Style

Thu Lan Nguyen; Ichiro Yamada; Takashi Yano; Koichi Makino; Masaharu Ohya. Validity of Reference Time Intervals in Noise Indicators for Aircraft Noise Policy in Vietnam. Urban Science 2020, 4, 19 .

AMA Style

Thu Lan Nguyen, Ichiro Yamada, Takashi Yano, Koichi Makino, Masaharu Ohya. Validity of Reference Time Intervals in Noise Indicators for Aircraft Noise Policy in Vietnam. Urban Science. 2020; 4 (2):19.

Chicago/Turabian Style

Thu Lan Nguyen; Ichiro Yamada; Takashi Yano; Koichi Makino; Masaharu Ohya. 2020. "Validity of Reference Time Intervals in Noise Indicators for Aircraft Noise Policy in Vietnam." Urban Science 4, no. 2: 19.

Journal article
Published: 10 April 2020 in International Journal of Environmental Research and Public Health
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Herein, the effects of changes in acoustic and non-acoustic factors on public health and reactions were assessed using two follow-up investigations; this was achieved after three surveys were conducted on the impact of the step change in noise caused by the increased number of flights at the Noi Bai International Airport in Hanoi (Vietnam) after the new terminal building was opened to the public. Exposure-response relationships established in the follow-up studies were less in number than those established in 2015 after the step change had occurred, and were almost similar to the relationship established in the survey conducted before the step change; however, these relationships were significantly greater than those established in the European Union position paper. Comparisons between respondents with high blood pressure and insomnia ratios at different noise level ranges showed that there is no significant association between ratios of high blood pressure and day-evening-night noise levels; however, an exposure-response relationship was discovered between insomnia and night-time noise levels. Non-acoustic factors such as noise sensitivity, sound insulation capacity of houses, and length of residence were found to curb the respondents’ annoyance, insomnia, and high blood pressure. Thus, an improvement in residence quality and a restriction on nighttime flight operation is necessitated.

ACS Style

Thu Lan Nguyen; Bach Lien Trieu; Yasuhiro Hiraguri; Makoto Morinaga; Takashi Morihara; Takashi Yano. Effects of Changes in Acoustic and Non-Acoustic Factors on Public Health and Reactions: Follow-Up Surveys in the Vicinity of the Hanoi Noi Bai International Airport. International Journal of Environmental Research and Public Health 2020, 17, 2597 .

AMA Style

Thu Lan Nguyen, Bach Lien Trieu, Yasuhiro Hiraguri, Makoto Morinaga, Takashi Morihara, Takashi Yano. Effects of Changes in Acoustic and Non-Acoustic Factors on Public Health and Reactions: Follow-Up Surveys in the Vicinity of the Hanoi Noi Bai International Airport. International Journal of Environmental Research and Public Health. 2020; 17 (7):2597.

Chicago/Turabian Style

Thu Lan Nguyen; Bach Lien Trieu; Yasuhiro Hiraguri; Makoto Morinaga; Takashi Morihara; Takashi Yano. 2020. "Effects of Changes in Acoustic and Non-Acoustic Factors on Public Health and Reactions: Follow-Up Surveys in the Vicinity of the Hanoi Noi Bai International Airport." International Journal of Environmental Research and Public Health 17, no. 7: 2597.