Investigation and Evaluation of Noise Level in the Northern Part of Klaipeda City/Triukšmo Lygio Šiaurinėje Klaipėdos Miesto Dalyje Tyrimai Ir Įvertinimas/Исследование И Анализ Шумового Уровня В Северной Части Города Клайпеды

Abstract

Abstract. The problem of noise is topical not only in Lithuania but the world over as well. The northern part of Klaipėda city is distinct for its industry and heavy traffic in the streets. Noise research was carried out in 17 selected measurement locations in the northern part of Klaipėda city. Noise measurements were taken in May, June, July, August, September, October and November. The measurements were made three times during the day: in the day time from 6 a.m. till 6 p.m., in the evening from 6 p.m. till 10 p.m. and at night from 10 p.m. till 6 a.m. The locations of the measurements are marked on the map. In order to distinguish the source of bigger noise between industry and transport, the northern part was divided into two belts. Industry is prevalent in the first belt, whereas the main troublemakers in the second belt are motor vehicles. The measured noise level is compared with permissible standards in measurement locations, where noise level is usually exceeded, and the analysis of noise levels is presented. In order to show the spread of noise in Klaipėda at all three times of the day more vividly, maps of isolines were compiled. Keywords: noise level, the highest permissible noise level, equivalent permissible noise level.

Reasearch and Evaluation of Electromagnetic Fields of Refrigerators / Šaldytuvų Elektromagnetinių Laukų Tyrimai Ir Vertinimas

“…Elektromagnetinis laukas, kaip ir triukšmas, yra ypatinga materijos forma (Vaišis, Januševičius 2008).…”

Modeling of Noise Dispersion in the Seaport Territoy and Residential Zone Using Cadnaa Program/Jūrų Uosto Teritorijos Ir Gyvenamosios Zonos Triukšmo Sklaidos Modeliavimas Taikant Programą Cadnaa/ Μοделирοвание Распространения Шума На Территοрии Морского Порта И Жилой Зоны При Пοмощи Прοграммы „cadnaa“

“…Triukšmo lygis pavieniuose teritorijų taškuose matuojamas integruojamais skaitmeniniais triukšmamačiais. Beje, šis metodas turi didelį trūkumąnegalima prognozuoti triukšmo lygio dar projektavimo tarpsniu, negalima įvertinti skirtingų triukšmo šaltinių atskirai (Armolaitis, Bartkevičius 2002;Vaišis, Januševičius 2008).…”

The Research on the Effectiveness of the Inclined Top Type of a Noise Barrier / Triukšmo Slopinimo Sienelės Viršutinės Dalies Polinkio Efektyvumo Tyrimai

“…Motor vehicles and especially the road traffic are one of the main sources of environmental noise, which makes a negative impact on the environment and its components (Jagniatinskis et al 2011;Paulauskas, Klimas 2011;Vaišis, Januševičius 2008). It is a growing environmental problem that is increasingly becoming an omnipresent, yet unnoticed form of pollution not only in developed countries but also in the developing countries (Firdaus, Ahmad 2010).…”