Effects of GSM-like Radiofrequency on distortion product otoacoustic emissions of rabbits: Comparison of infants versus adults

Budak, Gürer G.; Muluk, Nuray Bayar; Budak, Bilgehan; Öztürk, Güler; Apan, Alpaslan; Seyhan, Nesrin

doi:10.1016/j.ijporl.2009.04.020

Cited by 3 publications

(1 citation statement)

References 19 publications

(20 reference statements)

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“…Hamernik et al (1980) found that a damaged cochlea and vibrated membranous labyrinth were the main causes for vibration-induced cochlear function changes after low-frequency vibration [9]. Consistent with the results of this study, several factors were found to be associated with the enhanced DPOAE response amplitudes such as hypoxia [23], low frequency electromagnetic fields [24,25], and induced labyrinthitis [26,27], and some ototoxic drugs [26]. By contrast, some other studies reported that the DPOAE response amplitudes were significantly depressed following a number of factors including the administration of ototoxic drugs [28,29], acoustic trauma or noise overexposure [29,30], Meniere’s disease [31], sudden idiopathic sensorineural hearing loss [32], acoustic neuroma [33], presbycusis [34], and hereditary hearing disorders [35].…”

Section: Discussionsupporting

confidence: 84%

RETRACTED ARTICLE: Assessment of the influence of whole body vibration on Cochlear function

Moussavi-Najarkola

Khavanin

Mirzaei

et al. 2012

J Occup Med Toxicol

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BackgroundWhole body vibration (WBV) is a potentially harmful consequence resulting from the dissipation of energy by industrial machineries. The result of WBV exposure on the auditory system remains unknown. The objective of the present research was to evaluate the influence of WBV on cochlear function, in particular outer hair cell function. It is hypothesized that WBV impairs cochlear function resulting in decreased Distortion Product Otoacoustic Emission (DPOAE) levels (Ldp) in rabbits subjected to WBV.MethodsTwelve rabbits were equally divided into vibration and control groups. Animals in vibration group were exposed to 1.0 ms-2 r.m.s vertical WBV at 4–8 Hz for 8 h/day during 5 consecutive days. Outer hair cell function was assessed by comparing repeated-measurements of DPOAE levels (Ldp) across a range of f2 frequencies in rabbits both exposed and unexposed to WBV. DPOAE level shifts (LSdp) were compared across ears, frequencies, groups, and times.ResultsNo differences were seen over time in DPOAE levels in the non-exposed rabbits (p = 0.082). Post-exposure Ldp in rabbits exposed to WBV were significantly increased at all test frequencies in both ears compared to baseline measures (p = 0.021). The greatest increase in Ldp following exposure was seen at 5888.5 Hz (mean shift = 13.25 dB). Post-exposure Ldp in rabbits exposed to WBV were not significantly different between the right and left ears (p = 0.083).ConclusionWBV impairs cochlear function resulting in increased DPOAE responses in rabbits exposed to WBV. DPOAE level shifts occurred over a wide range of frequencies following prolonged WBV in rabbits.

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Section: Discussionsupporting

confidence: 84%

RETRACTED ARTICLE: Assessment of the influence of whole body vibration on Cochlear function

Moussavi-Najarkola

Khavanin

Mirzaei

et al. 2012

J Occup Med Toxicol

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Effects of whole body vibration on outer hair cells’ hearing response to distortion product otoacoustic emissions

Moussavi-Najarkola

Khavanin

Mirzaei

et al. 2012

In Vitro Cell.Dev.Biol.-Animal

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Whole body vibration (WBV) is one of the most vexing problems in industries. There is a debate about the effect of WBV exposure on hearing system as vibration-induced hearing loss. The purpose of this study was to investigate outer hair cells' (OHCs') hearing response hearing response to distortion product otoacoustic emissions (DPOAEs) in rabbits exposed to WBV. It was hypothesized that the DPOAE response amplitudes (A(dp)) in rabbits exposed to WBV would be lower than those in control rabbits not exposed to WBV. New Zealand white (NZW) rabbits as vibration group (n = 6, exposed to WBV in the z-axis at 4-8 Hz and 1.0 ms(-2) root mean square for 8 h per day during five consecutive days) and NZW rabbits as control group (n = 6, not exposed to any WBV) were participated. A(dp) and noise floor levels (L(nf)) were examined on three occasions: day 0 (i.e., baseline), day 8 (i.e., immediately 1 h after exposure), and day 11 (i.e., 72 h following exposure) with f(2) frequencies ranging from 500 to 10,000 Hz and primaries L(1) and L(2) levels of 65 and 55 dB sound pressure level, respectively. Main effects were statistically found to be significant for group, time, and frequency (p < 0.05). DPOAE amplitudes were significantly larger for rabbits exposed to WBV, larger on day 8 and larger for mid to high f(2) frequencies (at and above 5,888.50 Hz). Main effects were not statistically found to be significant for ear (p > 0.05). Also, four statistically significant interactions including time by ear, time by frequency, group by frequency, and group by time were detected (p < 0.05). Contrary to the main hypothesis, DPOAE amplitudes were significantly larger for rabbits exposed to WBV. WBV exposure significantly led to enhanced mean A(dp) at mid to high frequencies rather than at low ones.

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Are the young more sensitive than adults to the effects of radiofrequency fields? An examination of relevant data from cellular and animal studies

Marino

Lagroye²,

Scarfì³

et al. 2011

Progress in Biophysics and Molecular Biology

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Effects of GSM-like Radiofrequency on distortion product otoacoustic emissions of rabbits: Comparison of infants versus adults

Cited by 3 publications

References 19 publications

RETRACTED ARTICLE: Assessment of the influence of whole body vibration on Cochlear function

RETRACTED ARTICLE: Assessment of the influence of whole body vibration on Cochlear function

Effects of whole body vibration on outer hair cells’ hearing response to distortion product otoacoustic emissions

Are the young more sensitive than adults to the effects of radiofrequency fields? An examination of relevant data from cellular and animal studies

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