نتایج جستجو برای: industries noise

تعداد نتایج: 240719  

M Esfahanian, R Tikani S Ziaei Rad T Feyzi

Increasing current vehicle development trends for small, light, front wheel drive vehicles with low idle speeds have been forced automotive industries to use hydraulic engine mounts for further improvement in vibration, noise and harshness (NVH) performance of the vehicles. However, with the development of modern vehicle designs such as hybrid vehicles and variable engine management systems whi...

2011

Technical description: Trophophore stalk 03 cm, 0-1.5 times length of trophophore rachis; blade dull to bright green to whitish green, linear to ovate oblong to oblong to fully triangular with pinnae arranged ternately, simple to 2(-3) pinnate, to 7 x 0.2 cm, fleshy to thin, papery or herbaceous. Pinnae or well-developed lobes to 7 pairs, spreading to ascending, approximate to widely separated,...

1999
Hasan YILDIRIM Yusuf GEMİCİ Paul WILKIN

Scilla vardaria Yıldırım & Gemici (Asparagaceae) is described as a new species. Diagnostic morphological characters, a full description and detailed illustrations are provided on the basis of the type specimen and observations of wild populations. The new species is characterized by the conical floral corona structure formed by fusion of its filaments, with anthers arising almost at the floral ...

2008
S. M. Abdel - gaied

The localization of graphical primitives is important task in image processing. This paper discusses problems of automatic computer-based detection and localization of elementary shape in image. A genetic algorithm is used for this task. The using of genetic algorithm allows efficiently reduce time needed to scan a task state space. A modification of genetic algorithm for shape detection is pre...

Journal: :Archeopages 2012

ژورنال: تحقیقات موتور 2019
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Muffler is a part of the vehicle exhaust system that absorb or reflect sound waves to reduce exhaust noise. One of the most important determinants of a muffler performance is the amount of attenuation that has on its input wave; this parameter is known as sound transmission loss. Four - mic standard test is one way to determine this parameter which is used in this paper. In this study, a test d...

Journal: :The international journal of occupational and environmental medicine 2012
S A Moussavi-Najarkola A Khavanin R Mirzaei M Salehnia A Muhammadnejad M Akbari

BACKGROUND Noise-induced hearing loss (NIHL) is one of the most common occupational illnesses. Most of the studies on NIHL were conducted at high noise levels that people are rarely exposed to but in industries. The function of the outer hair cells (OHCs) is impaired after exposure to industrial noise. Distortion product otoacoustic emissions (DPOAEs) are useful in examination of noise-induced ...

Journal: :auditory and vestibular research 0
seyyedeh zeynab nureddini department of audiology, school of rehabilitation, shahid beheshti university of medical sciences, tehran, iran ali mohammadzadeh department of audiology, school of rehabilitation, shahid beheshti university of medical sciences, tehran, iran majid ashrafi department of audiology, school of rehabilitation, shahid beheshti university of medical sciences, tehran, iran seyyed mehdi tabatabai department of statistics, school of rehabilitation, shahid beheshti university of medical sciences, tehran, iran leyla jalilvand karimi department of audiology, school of rehabilitation, shahid beheshti university of medical sciences, tehran, iran

background and aim: speech understanding almost never occurs in silence. verbal communication often occurs in environments where multiple speakers are talking. in such environments, babbling noise masks speech comprehension. consonants, in comparison to vowels, are more sensitive to noise masking. consonants provide most acoustic information needed for comprehending the meaning of the word. sin...

Journal: :Lateral 2012

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