Low frequency electromagnetic radiation and hearing

• Published in: Journal of laryngology and otology Vol. 123; no. 11; pp. 1204 - 1211
• Main Authors: Morales, J, Garcia, M, Perez, C, Valverde, J V, Lopez-Sanchez, C, Garcia-Martinez, V, Quesada, J L
• Format: Journal Article
• Language: English
• Published: Cambridge, UK Cambridge University Press 01.11.2009
• Subjects: Animals; Biological and medical sciences; Cochlea; Dose-Response Relationship, Radiation; Electromagnetic Fields - adverse effects; Electromagnetic Radiation; Electromagnetism; Female; Guinea Pig; Guinea Pigs; Hair Cells, Auditory, Outer - physiology; Hair Cells, Auditory, Outer - radiation effects; Hearing - physiology; Hearing - radiation effects; Inner Ear; Laboratory animals; Male; Medical sciences; Microscopy, Electron, Scanning; Otorhinolaryngology. Stomatology; Propagation; Radiation; Sound waves; United States > US; California; Cochlea; Electromagnetic Radiation; Guinea Pig; Inner Ear; Vertebrata; Hearing; Mammalia; Guinea pig; Animal; Rodentia; Electromagnetic; ENT; Low frequency; Inner ear
• ISSN: 0022-2151; 1748-5460
• DOI: 10.1017/S0022215109005684

To analyse the possible impact of low and extremely low frequency electromagnetic fields on the outer hairs cells of the organ of Corti, in a guinea pig model. Electromagnetic fields of 50, 500, 1000, 2000, 4000 and 5000 Hz frequencies and 1.5 microT intensity were generated using a transverse electromagnetic wave guide. Guinea pigs of both sexes, weighing 100-150 g, were used, with no abnormalities on general and otic examination. Total exposure times were: 360 hours for 50, 500 and 1000 Hz; 3300 hours for 2000 Hz; 4820 hours for 4000 Hz; and 6420 hours for 5000 Hz. One control animal was used in each frequency group. The parameters measured by electric response audiometer included: hearing level; waves I-IV latencies; wave I-III interpeak latency; and percentage appearance of waves I-III at 90 and 50 dB sound pressure level intensity. Values for the above parameters did not differ significantly, comparing the control animal and the rest of each group. In addition, no significant differences were found between our findings and those of previous studies of normal guinea pigs. Prolonged exposure to electromagnetic fields of 50 Hz to 5 KHz frequencies and 1.5 microT intensity, produced no functional or morphological alteration in the outer hair cells of the guinea pig organ of Corti.