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language
eng
Author
Yamada , Ichiro Airport Environment Improvement Foundation, Tokyo 105-0011, Japan
Yano, Takashi Department of Architecture, Kumamoto University, Kumamoto 860-8555, Japan
Makino , Koichi Kobayasi Institute of Physical Research, Tokyo 185-0022, Japan
Ohya, Masaharu Rion Co., Ltd., Tokyo 185-8533, Japan
Description
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 ( Lden ), day–night-weighted sound pressure level ( Ldn ), and nighttime average sound pressure level ( Lnight ) 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 Lden , Ldn , and Lnight 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.
Subject
aircraft noise indicators
temporal patterns
environmental quality standards
Journal Title
Urban Science
Volume
4
Issue
2
ISSN
2413-8851
Published Date
2020-04-20
DOI
Publisher
MDPI
NII Type
Journal Article
Format
PDF
Relation
Text Version
出版社版
Gyoseki ID
e37854
OAI-PMH Set
Faculty of Science and Engineering