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 (PET) and polystyrene (PS) with an economical method in order to control of noise pollution
Materials and methods: Sound absorber were made of PET and PS with equal weight percent, polyester fiber, and polyvinyl acetate resine, with five to ten centimeters thick. Sound mean absorption coefficient percents were determined by acoustic impedance tube and compared with those of rock wool.
Results: Mean absorption coefficient percent of  samples with one to five millimeter pore size and ten centimeters thickness was significantly better than those with six to twenty millimeters pore size in 50 to 630, 1250, and 1600 Hz, (p<0.05). In general, samples mean absorption coehicient was significally different from those rock wool (p=0.005).
Conclusion: Recycle polymere absorbers may play an important role in national economics as they are prophylactic to some occupational disease and also are economical.

Background: Fanconi anemia (FA) is an autosomal recessive genetic disorder wich characterized by progressive pancytopenia, multiple congenital anomalies,  increased susceptibility to acute myelogenous leukemia and epithelial cancers specially in head and neck and GUT. Characteristic feature of FA include short stature, café-au-laitspots, small eyes, mental retardation, skeletal and ear anomalies.
Case: A 23-year-old man who was a known case of FA since he was ten reffered to audiology clinic because of severe hearing loss. His initial diagnosis was pneumonia. Audilogic evaluation revealed  bilateral profound hearing loss.
Conclusion: One of the anomalies in FA are  ear anomalies. These included conductive haering loss, external auditory canal stenosis and auricular malformation and progressive sensoryneural hearing loss. In this report external auditory canal and tympanic membrane were normal. The result of tympanometry were type An and audiometry were bilateral profound hearing loss that is a rare finding  in FA patient.