@techreport{oai:ipsj.ixsq.nii.ac.jp:00233916,
 author = {上田, 麻理 and 向井, 基貴 and 廣江, 正明 and 清原, 良三 and Mari, Ueda and Motoki, Mukai and Masaaki, Hiroe and Ryozo, Kiyohara},
 issue = {49},
 month = {May},
 note = {本研究では，車両から発生する高周波音に着目し，列車内の高周波音の発生状況のための高周波音の曝露実態調査を行った．さらに，高周波音の聴こえの状態を明らかにするために，大学生を対象とした高周波純音可聴域の計測及び，列車内での聴感実験を行った．その結果，対象とした私鉄沿線の特にカーブから 18kHz から 20kHz 近傍の高周波音が複数観測された．また，閾値測定において高周波帯域の試験音が聞こえた場合には列車内においても高周波音を，知覚していることが分かった．, We have reported recent investigation of sound exposure sources in veryhigh frequency (VHF) region as the activities for research project of VHF sounds in Japan. Recently, the devices which utilize or generate VHF sounds as like rodent repelling devices, ultrasonic cleaning machines, IH cookers and corner sensors of automobile continue to increase in public space or our living environment. The VHF sounds in high level have physical or/and psychological effects for young people who can hear such sounds. So, in environment around us, we identified VHF sound sources using acoustic camera and measured the sound pressure level for such sources. In this paper, we introduce newlydiscovered several VHF sounds: for example, ultrasounds from corner sensors of automobile car, VHF sounds from photovoltaic installation and VHF sounds of interior train, and so on. From both the results measured by acoustic camera and microphones show source positions and frequency characteristics of VHF sounds. However these play important role in our life environment, we need to note that these contain potential hazard for young people whocanhearsuchVHF sounds},
 title = {若齢者に配慮した車両から発生するVHF音の探査-その2},
 year = {2024}
}