Introduction: Although in several investigations, it has obviously been clarified that ELF electromagnetic fields can cause some changes in cellular behavior, it is increasingly clear that determinant parameters of energy (frequency, amplitude, waveform etc.) to which the cell is exposed, influence final outcome. The aim was to investigate the effect of magnetic field on sperm parameters such as; motility, morphology and viability.Materials and Methods: Semen sample were collected from 12 patients after 3 days of abstinence. The samples were allowed to liquefy for 15 minutes at 37oC before preparation. The experimental group was then placed in the field, while the control group was left intact. The applied fields were pulsed with distance of 6 msec and effective intensity 1 mT and frequency 10 Hz, and constant field intensity was 1 mT in all experiments.Results: The results indicated that in frequency 10Hz, an obvious increase occurred in quick motility ratio of sperm (1.8 times) after 4 hours. However, the slow motility ratio of sperms decreased by 40% after 2 hours. The maximal effect on sperm’s quick motility occurred in frequency 10 Hz after 4 hours. The stimulation ratio on the viability of sperms was statistically significant at frequency 10 Hz after 2 hours of incubation. The sperm morphology was not influenced in any of the fields.Concolusion: This research showed that magnetic field with frequency 10Hz can influence sperm parameters. The duration of exposure to magnetic field is on important sperm issue.

Background and Aim: Frequency following response (FFR) is a neural response with multiple origins. The purpose of current study is to record FFR with alternative and single polarity 500 Hz tone burst stimuli in the setting of auditory brainstem response (ABR).Methods: The population of this observational study consists of 21 adults (n=42 ears) with a mean age of 22.43 (SD=1.51), with 8 out 21 (38%) being female. The participant shows normal results in otoscopy, tympanometry, acoustic reflex, pure tone audiometry, speech recognition threshold, and speech discrimination score. They underwent ABR with a click and various polarities of 500 Hz tone burst stimuli.Results: First, latencies of ABR waveform with the alternative polarity of click and tone burst were compared and then with changing the polarity to single polarity, FFR was recorded in 24 ears (about 57%) using the 500 Hz tone burst stimuli. The results showed that in some patients changing the polarity caused a better morphology.Conclusion: In some cases, FFR can be recorded in ABR setting. In addition, because of large amplitude, they fade away ABR waveforms.