نتایج جستجو برای: noise ratio

تعداد نتایج: 652232  

Journal: :Scholarpedia 2006

Journal: :medical journal of islamic republic of iran 0
elahe shojaei department of audiology, school of rehabilitation sciences, iran university of medical sciences, tehran, iran.سازمان اصلی تایید شده: دانشگاه علوم پزشکی ایران (iran university of medical sciences) hassan ashayeri department of basic sciences in rehabilitation, school of rehabilitation sciences, iran university of medical sciences, tehran, iran.سازمان اصلی تایید شده: دانشگاه علوم پزشکی ایران (iran university of medical sciences) zahra jafari department of basic sciences in rehabilitation, school of rehabilitation sciences, iran university of medical sciences, tehran, iran.سازمان اصلی تایید شده: دانشگاه علوم پزشکی ایران (iran university of medical sciences) mohammad reza zarrin dast department of pharmacology, tehran university of medical sciences, tehran, iran.سازمان اصلی تایید شده: دانشگاه علوم پزشکی تهران (tehran university of medical sciences) koorosh kamali department of public health, zanjan university of medical sciences, zanjan, iran.سازمان اصلی تایید شده: دانشگاه علوم پزشکی زنجان (zanjan university of medical sciences)

background: speech perception ability depends on auditory and extra-auditory elements. the signal-to-noise ratio (snr) is an extra-auditory element that has an effect on the ability to normally follow speech and maintain a conversation. speech in noise perception difficulty is a common complaint of the elderly. in this study, the importance of snr magnitude as an extra-auditory effect on speech...

Journal: :auditory and vestibular research 0
abdollah moossavi department of otolaryngology, school of medicine, iran university of medical sciences, tehran, iran saeideh mehrkian department of audiology, university of social welfare and rehabilitation sciences, tehran, iran farahnaz karami department of audiology, university of social welfare and rehabilitation sciences, tehran, iran akbar biglarian department of biostatistics, university of social welfare and rehabilitation sciences, tehran, iran behrooz mahmoodi bakhtiari department of performing, school of performing arts and music, university of tehran, tehran, iran

background and aim: with regard to the shortage of proper materials in persian for the evaluation of speech perception in children, this study aimed to develop the persian version of the bkb sentence test, and determine its content validity in normal persian speaking children aged 6-12 years. methods: this study was an applied research. the study procedure comprised sentence construction, deter...

Journal: :avicenna journal of medical biotechnology 0

background: the microarray technology is in needed of cost-effective, low background noise and stable substrates for successful hybridization and analysis. methods: in this research, we developed a three-dimentional stable and mechanically reliable microarray substrates by coating of two polymeric layers on standard microscope glass slides. for fabrication of these substrates, a thin film of ox...

Journal: :iranian journal of medical physics 0
sayyede batoul shokouhian department of biomedical engineering, faculty of engineering, university of isfahan, isfahan, iran. alireza karimian department of biomedical engineering, faculty of engineering, university of isfahan, isfahan, iran. mohammad mohammad-zadeh information communication technology (ict) faculty, ict ministry, tehran, iran department of nuclear engineering, shahid beheshti university g. c., tehran, iran hamid reza salighe-rad department of medical physics & biomedical engineering and research center for science and technology (rcstim); tehran university of medical sciences, tehran, iran.

introduction radiofrequency planar microcoils are used to increase the resolution of magnetic resonance images of small samples. in this study, we aimed to design and fabricate a spiral planar microcoil constructed on a double-sided printed circuit board (pcb). it has four rings with an internal diameter of 241 microns tuned and matched at 63.8 mhz. materials and methods to achieve the maximum ...

Journal: :Remote Sensing 2023

Ship noise observation is of great significance to marine environment research and national defense security. Acoustic stealth technology makes a variety ship significantly reduced, which new challenge for monitoring. However, there are few high spatial gain detection methods low-noise Therefore, Signal-to-Noise Ratio (SNR) MEMS listener developed in this paper. The achieves considerable by sup...

Journal: :medical journal of islamic republic of iran 0
mashallah aghilinejad faculty of medicine of iran university of medical sciences, andسازمان اصلی تایید شده: دانشگاه علوم پزشکی ایران (iran university of medical sciences) masoumeh ghiasvand faculty of medicine of iran university of medical sciences, and research center of occupationalسازمان اصلی تایید شده: دانشگاه علوم پزشکی ایران (iran university of medical sciences) seyed javad haji-miresmaeil iran university of medical sciences.سازمان اصلی تایید شده: دانشگاه علوم پزشکی ایران (iran university of medical sciences)

abstract background: previous studies have indicated an unspecific correlation between noise exposure and blood pressure disturbances. blood pressure disturbances could be caused by the environmental hazards such as noise exposure. the aim of this study is to analyze whether there is a relationship between noise exposure and hypertension. methods: atotal sample of 218 workers working in a small...

ژورنال: ارگونومی 2013

Introduction: Noise pollution cause mental fatigue, concentration disturbance and learning loss in students during the training activities. This study aims to evaluate Noise pollution and the level of acoustical comfort in typical classrooms, and present treatment methods for improving acoustic comfort. Method: In cross sectional study, twenty classrooms in the seven faculty of Hamadan Univers...

Journal: :health scope 0
anirban kundu chowdhury department of civil engineering, jadavpur university, kolkata, india; department of civil engineering, jadavpur university, kolkata, 700032, india. tel: +91-9433263939 anupam debsarkar department of civil engineering, jadavpur university, kolkata, india shibnath chakrabarty department of civil engineering, jadavpur university, kolkata, india

conclusions atpl was higher in the post-monsoon season. w/s ratio and correlation analysis revealed interseasonal homogeneity of tmv and traffic noise levels and interseasonal heterogeneity of air pollutant concentrations and atpl in the city microenvironments. results atpl was 3.35 times higher in the post-monsoon and 1.83 times higher in the pre-monsoon season than the permissible limits pres...

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