نتایج جستجو برای: sound pressure level

تعداد نتایج: 1531055  

Journal: :TRANSACTIONS OF THE JAPAN SOCIETY OF MECHANICAL ENGINEERS Series C 1993

Journal: :The Journal of the Acoustical Society of America 1983

Journal: :The Journal of experimental biology 2012
Christian Bech Christensen Jakob Christensen-Dalsgaard Christian Brandt Peter Teglberg Madsen

Snakes lack both an outer ear and a tympanic middle ear, which in most tetrapods provide impedance matching between the air and inner ear fluids and hence improve pressure hearing in air. Snakes would therefore be expected to have very poor pressure hearing and generally be insensitive to airborne sound, whereas the connection of the middle ear bone to the jaw bones in snakes should confer acut...

ژورنال: سلامت کار ایران 2016

Background and aims: Development of new air pollution control techniques have always been the main concern of the researchers. The purpose of this experimental study was to investigate the effects of using acoustic fields at high sound pressure levels on the removal of sulfuric acid mist from the air stream. Methods: In this experimental study, an experimental scale agglomeration chamber was...

2016
Genuit Klaus Fiebig André

For the evaluation of soundscape the perception by the human being with respect to the auditory sensation is very important, which is also influenced by expectation, experience and context. The well-known A-weighted sound pressure level is a suitable predictor at higher levels to estimate a possible damage of the human hearing by sound. But at lower sound pressure levels annoyance cannot be suf...

ژورنال: ارگونومی 2016
ثابتی, شهزاد, جعفری, سمیه, حیدری, پیام, عطایی, سجاد, ورمزیار, سکینه,

Introduction: Listening to music during physical activity reduces the perceived stress on body. Hence, this study aimed to evaluate the effects of music genre and sound pressure level on calorie consumption and physical performance of students during treadmill tests. Methods: In this cross-sectional study, 27 students were randomly selected. A demographic questionnaire, Borg Rating of Percei...

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