نتایج جستجو برای: noise cancelation

تعداد نتایج: 195269  

Journal: :EURASIP J. Wireless Comm. and Networking 2018
Lei Chen J. G. Yu

The universal filtered multicarrier (UFMC) is an appealing technique to eliminate out-of-band emission (OOBE) for fifth-generation (5G) networks. However, its signals that are modulated to the carriers, which are on the edges of one subband, are influenced by the filter. In this paper, an interference cancelation scheme is proposed to suppress the interference and to improve the multiuser syste...

Journal: :Physica A: Statistical Mechanics and its Applications 2010

Journal: :IEEE Transactions on Very Large Scale Integration (VLSI) Systems 2018

Journal: :jundishapur journal of health sciences 0
behzad fouladi dehaghi department of occupational health, school of public health, ahvaz jundishapur university of medical sciences, ahvaz, ir iran; department of occupational health, school of public health, ahvaz university of medical sciences, ahvaz, ir iran. tel: +98-6113738282, fax: +98-6113367543 parvin nassiri department of occupational health, school of public health, tehran university of medical sciences, tehran, ir iran mohammad reza monazam department of occupational health, school of public health, tehran university of medical sciences, tehran, ir iran leila ebrahimi ghavam abadi department of environmental management, islamic azad university, science and research branch, ahvaz, ir iran e saeed farahani department of audiology, school of rehabilitation, tehran university of medical sciences, tehran, ir iran gholamreza hassanzadeh department of anatomy, school of medicine, tehran university of medical sciences, tehran, ir iran

background noise exposure is known as a risk factor for hearing loss and one of its effects is noise-induced stress. cortisol as a stress hormone is used in noise-induced stress assessments. objectives the aim of this study was to measure and compare saliva cortisol concentrations in the morning and evening in normal work day and rest day in both case and control groups and to assess the associ...

Journal: :health scope 0
nazanin izadi center for research on occupational diseases, tehran university of medical sciences, tehran, ir iran mahdi sadeghi environmental health research center, golestan university of medical sciences, gorgan, ir iran; environmental health research center, golestan university of medical sciences, gorgan, ir iran. tel: +98-1732436102, fax: +98-1732436107 maryam saraie center for research on occupational diseases, tehran university of medical sciences, tehran, ir iran

conclusions due to the long exposure to the loud noise during the day, hearing loss in drivers is significant. the left ear displays greater loss than the right ear. therefore, strategies to prevent hearing loss in drivers could include education, lifestyle changes and compliance issues related to hearing health, use of personal protective equipment, conducting periodic examinations and early t...

Journal: :iranian journal of public health 0
d. parvizpour p. meshgi

the paper is based on a study conducted in three different industries on 84.4 on their employees to determine the effect of over all noise intensity, length of employment and rest periods among them. it was found that the mentioned factors have direct effect on the induced hearing loss among the exposed workers. high noise level and long period of employment adversely affect the hearing ability...

Journal: :jundishapur journal of health sciences 0
behzad fouladi dehaghi department of occupational health, school of health, ahvaz jundishapur university of medical sciences, ahvaz, ir iran; department of occupational health, school of health, ahvaz jundishapur university of medical sciences, ahvaz, ir iran. tel/fax: +98-6133735318 leila ibrahimi ghavam abadi department of environmental management, ahvaz branch, islamic azad university, ahvaz, ir iran hamid rasi department of occupational health, school of health, ahvaz jundishapur university of medical sciences, ahvaz, ir iran kambiz ahmadi angali department of occupational health, school of health, ahvaz jundishapur university of medical sciences, ahvaz, ir iran

results according to the study results, noise levels in a co2 plant’s house and control room ranged from 88 to 102 db and 79 to 82 db (a), respectively. in order to reduce the amount of emitted noise in the co2 plant house and control room, a noise control plan was implemented in each part of the facility; it was met with effective results. conclusions the findings of this investigation have cl...

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