نتایج جستجو برای: equivalent sound level

تعداد نتایج: 1290264  

2014
Katsuya YAMAUCHI Takaichi SANO Shin HASEGAWA Fumio TAMURA Yuichiro TAKEDA

Electric or hybrid electric vehicles (EVs/HEVs) have the advantages that they make lesser noise compared to conventional engine vehicles. This quietness is, however, a matter of concern for pedestrians because the sound of EVs/HEVs may be inaudible in urban backgrounds. Hence, the application of additional soundemitting device has been studied. Gathering wide range of acoustic knowledge on feas...

جعفرزاده, افشین , جعفری جاوید, میهن , جنیدی جعفری, احمد , حاجی‌پور, اصغر , صاحبدل, ابراهیم , صمدی, شهرام , میراسکندری, سید محمد , کروندیان, کسری ,

Background: Surgeons and anesthesiologists working in orthopedic operating theatres are exposed to significant noise pollution due to the use of powered instruments. This may carry a risk of noise-induced hearing loss. The present study was designed to quantify the noise pollution experienced by anesthesiologists at Imam Khomeini Hospital which is one of the largest Iranian hospitals. Methods:...

Background and Objectives: Exposure to high levels of noise can lead to physical and psychological problems. The purpose of this study was to determine the sound level of welding centers in Babol. Materials and Methods: This descriptive study was randomly performed in 20 welding workshops in 2018. The sound level was measured by sound level meter. The researcher-made form was completed by the ...

Background: This study aimed to measure the sound level and assess the association between noise annoyance and general health in Iranian nurses at Tabriz Pediatric Hospital in neonatal, infectious, internal, NICU, and emergency care wards. Materials and Methods: The noise level was measured continuously according to ISO9612. The general health questionnaire-28, the noise annoyance scale based ...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه تبریز 1381

deposite the different criticisms on contrastive analysis it has been proved that the results of it(when processed)can be usuful in a tefl environment,specially at the level of phonology.this study is an attempt to compare and contrast the sound systems of kurdish and english for pedagogical aims. the consonants,vowels,stress and intonation of the twolanguages are described by the same model-ta...

بهزادی, محمد حسن , مصطفایی , مریم , نصیری, پروین ,

Introduction: According to previous researches, working at the airport is one of the most vociferous jobs in the world. Airport workers are at risk of noise induced hearing loss. The present study was done to evaluate the Sound Pressure Level (SPL) in the closest aprons to Ground Safety department at Mehrabad airport and to investigate the effect of airport noise on the employees of this depart...

2011
Seunghoon Lee Kyutae Kim Wooyoung Choi Soogab Lee

A listening test has been performed to investigate the relationship between human annoyance and the amplitude modulation of wind turbine noise. To obtain sound samples for the listening test, sound from a 1.5 MW wind turbine in Korea was recorded. The strength of the amplitude modulation of the sound samples was defined in terms of the modulation depth spectrum, which was approximated by assumi...

Journal: :international journal of environmental research 2010
h. mehravaran s. zabani gh.r. nabi bidhendi r. ghousi h. keshavarzi shirazi

the equivalent noise level in large cities has been growing due to the population growth, uncontrolled production of cars, and the existence of worn out cars. on the other hand, heavy traffic has increased the amount of noise problems for residents of medical and educational centers, research institutes and residential area (or sensitive centers to noise) built in highway bounds and it has also...

Journal: :Jurnal panorama hukum 2022

The protection of human rights and just welfare are Indonesia's orientation as a rule law country. In line with developments civilization, parade activities that should show our customary wealth cultural identity beginning to be eroded by sound system parades which tend cause social problems in society, conflicts even physical damage health caused the loud powerful system. purpose this study is...

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