THE SURVEY OF ENVIRONMENTAL NOISE IN PROVINCIAL CITIES : 19years renewal instructions in Nagano city

Abstract

III thls paper ， the measured results of env 蜘 nmental noiSe in pmv 血 cial cities are discussed ． We measured the enVirpnmental neise in the proViiiCial cities ofNagano Prefbcture fi 〕 r the past 19 years． The measured resUltS are as fO 口ows ． 1・In 。 Dmm ・ r ・ i・ 1 zanes and b・1・ng 鯱 n ・ 1・ ・adS ・ a ・ea ・， ・enVir ・nm ・ntal n ・ise ・w ・ ・ 9 ・eat ． 2，In residential mnes and agricUltura1 mnes ， at enVironmental noise wali small in many areas ， but in some areas the noise leveI was high ， due tO loud road tralfic noise ． 3 ．We compared the data With past measurement resUltS ． In oommercial zones and industrial z 〔 》nes ， envimn 皿 enta1 noise decreased averagely ． ln residentia1 rones and ag 血 cultural m )nes ， LA 。 q and Ls got smaller ， but lmo and Lss get larger ． These resUltS ildicate that at many areas in the city no おe levels were un 漁｝ rm ． 伽 廊 ： Envitonmei 吻 〃VoiSq hand Usq EielatiOn ， P，vvinciat Citt ' es ， 酬 α _ 雇