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High-Frequency Hearing Loss Amongst Smart Mobile Phone Users: A Case-Control Study.

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Mobile phone radiation may harm hearing, particularly at high frequencies. Brainstem Auditory Evoked Response (BAER) testing can detect early signs of hearing loss in heavy smartphone users.

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Area of Science:

  • Audiology
  • Neuroscience
  • Public Health

Background:

  • Mobile phone usage has surged globally, reaching 5.6 billion users.
  • Electromagnetic radiation from mobile phones may damage the inner ear and auditory pathway.
  • Increased mobile phone use raises concerns about potential auditory health impacts.

Purpose of the Study:

  • To investigate the effects of prolonged smartphone use on auditory function.
  • To assess hearing changes in individuals with extensive daily mobile phone exposure.
  • To determine if Brainstem Auditory Evoked Response (BAER) can detect early auditory pathway alterations.

Main Methods:

  • A case-control study involving 60 participants, divided into two groups based on smartphone usage duration (1-5 years vs. >5 years) and daily exposure (>2 hours).
  • Exclusion criteria included headache, tinnitus, or burning sensations.
  • Brainstem Auditory Evoked Potential (BAEP) tests were conducted, with data analyzed using unpaired t-tests and chi-square tests.

Main Results:

  • Participants with longer smartphone usage (>5 years) showed delayed Brainstem Evoked Response Audiometry (BERA) wave latencies at 80 dB and frequencies of 4, 6, and 8 KHz compared to shorter-term users.
  • These delays were statistically significant, particularly at the 8 KHz frequency.
  • Interpeak latencies were also significantly delayed in the heavy-use group.

Conclusions:

  • Brainstem Evoked Response Audiometry (BERA) is effective in detecting early high-frequency hearing loss (at 8 KHz) associated with heavy smartphone use.
  • BERA can identify early involvement of the central neural axis in individuals exposed to prolonged mobile phone radiation.
  • This study highlights the potential ototoxic effects of mobile phone radiation and the utility of BERA in early diagnosis.