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Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 13 of 13 for “"sound level meter"”.
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Noise characterization and exposure at a ski resort
… crew exceeded the OSHA 12-hour Action level (82 dBA), 40% exceeded the OSHA recommended 12-hour PEL (87 dBA), 10% exceeded the OSHA PEL (90 dBA), and 100% exceeded the ACGIH® 12-hour TLV® (83 dBA). Results also indicated that of the day-shift snowmaker crew, 33% exceeded the OSHA …
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A Case Study on Elective Mutism Using a consultation Model
… The procedure consisted of trials using a sound-level meter to successively approximate the desired behavior of speaking at school. The goal was for the subject to respond verbally to questions and requests invoked by her teachers and peers within the school setting and to improve her …
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Reducing the decibels of noise produced by the wood planer in the shop of the Vocational Agriculture Department
… noise to eighty-five decibels of audible sound revealed that the acoustical treatments would reduce the noise level in the shop. Eighty-five decibels of sound was the established federal safety level at which continuous exposure of the unprotected ear to the noise would not cause decibel …
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The learning space: a study of the suggested principles and practices in designing the classroom environment
… to these designs. Field testing, using a sound level meter and a lux meter, measured frequencies and light levels and evaluated the percentages of loss or gain, confirming some findings regarding students' abilities to properly hear and comprehend spoken material and to properly see visual …
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Intensity distribution in cylindrical and bowl shaped transducers and sono-dialysis of a caustic solution
… the standard equipment is available, such as the sound level meter, to measure the absolute intensity, but at higher frequencies the problem becomes complicated by the diffraction effects on account of the size of the measuring device. In this investigation an attempt has been made to construct a …
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Design optimization and evaluation of integrating sound level meters.
… of hearing loss is related to the cumulative sound energy received by the ear. The instrument which computes a measure of this parameter is an integrating sound level meter (ISLM). Optimum design requirements for ISLMs which meet a variety of demanding specifications have been determined. …
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The noise awareness among hospital community due to traffic and construction noise in Hospital Raja Permaisuri Bainun
… Road and construction on the hospital block. A sound level meter was used to measure the both noise at 3 different measuring points within the study area. Measurements were taken during the day (7am to 7pm) and at night (8pm-11.30pm) in order to establish the noise around the hospital. The data …
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Developing a framework of non-fatal occupational injury surveillance for risk control in palm oil mills
… Noise hazard monitoring was executed by using Sound Level Meter (SLM) for environmental noise monitoring and Personal Sound Dosimeter for personal noise monitoring. Gathered data were analysed in quantitative method by using statistical software IBM SPSS Statistic version 21 and a risk matrix …
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Noise analysis of inkjet printers over stages and quality of the job and frequency sources from equipment in laboratory optical trap room
This experiment measured the level of sound emitted over the course of the print cycle by an HP inkjet printer and determined how the level varies with changes in the print quality settings and stages of the print cycle. As a test document was printed on the printer at various print quality …
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Noise Levels In The Neonatal Intensive Care Unit: A Systematic Review
… this systematic review is to investigate noise levels in the Neonatal Intensive Care Unit (NICU) in order to see if they are in compliance with the American Academy of Pediatrics (AAP) proposed standards. This investigation also aims to compare noise levels among various NICU conditions in order …
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Emergency vehicle siren noise: A potential for hearing loss
… the siren emitting the greatest intensity of sound. This study has researched emergency vehicle sirens from the perspective of employee exposure to siren noise. Noise levels were recorded from inside the police vehicles using a hand held digital sound level meter while the vehicle was driven …
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Music Intensity in the Ear Canal in Quiet and in Subway Noise Using Four Different Headphones
… loss, hearing loss caused by exposure to loud sounds, affects individuals of all ages. One cause of noise-induced hearing loss is listening to music at high intensities on personal listening devices, such as the iPhone. The aim of this study was to compare the intensity of music in the ear …
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Aplikace pro zlomko-oktávovou analýzu zvukových signálů v Matlabu
Tato diplomová práce se zabývá implementací zlomkooktávové analýzy zvukových signálů. Analýza se provádí v reálném čase v rámci vytvořené aplikace v prostředí Matlab. Navržené banky filtrů použité při této analýze splňují požadavky normy ČSN EN 61260. Výsledkem analýzy jsou zobrazeny hodnoty časově …