Manufacturing Sound Absorber Based on Combined Recycling of Polyethylene Trephetalat and Polystyrene at Low and Median Frequencies
Background and aim: Noise pollution is one of the main cause of occupational hearing loss. According to WHO reports in many countries workers have been exposed to 85 – 90 dB noise level. The purpose of this study is to manufacture a sound absorber based on combined recycled polyethylene trephetalat...
| Main Authors: | , , |
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| Format: | Article |
| Language: | fas |
| Published: |
Tehran University of Medical Sciences
2008-06-01
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| Series: | Audiology |
| Subjects: | |
| Online Access: | http://journals.tums.ac.ir/upload_files/pdf/12364.pdf |