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Inner Ear Damage by Firecracker Trauma.

Yu-Hao Liao, Yi-Ho Young

    Audiology & Neuro-Otology
    |September 12, 2018
    PubMed
    Summary
    This summary is machine-generated.

    Firecracker noise causes significant high-tone hearing loss and damages the inner ear's cochlea and vestibular organs. This blast injury affects the saccule and utricle, but spares the semicircular canals.

    Keywords:
    Acoustic traumaBlast injuryFirecrackerInner ear test batteryVestibular-evoked myogenic potential

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    Area of Science:

    • Otolaryngology
    • Audiology
    • Acoustics

    Background:

    • Firecrackers are widely used globally, posing risks of noise-induced hearing loss.
    • Firecracker trauma can lead to significant inner ear damage, affecting both auditory and vestibular functions.

    Purpose of the Study:

    • To investigate inner ear damage in patients with firecracker trauma.
    • To analyze the noise levels of commercially available firecrackers.

    Main Methods:

    • Evaluated 30 patients with firecracker trauma using audiometry, cervical and ocular vestibular-evoked myogenic potential (cVEMP and oVEMP) tests, and caloric tests.
    • Measured real-time noise levels of 6 firecracker types at 2, 4, and 6 meters.

    Main Results:

    • Firecrackers generated noise levels exceeding 110 dB SPL even at 6 meters.
    • Patients exhibited significant high-frequency (4,000 and 8,000 Hz) hearing loss.
    • Vestibular assessment showed high abnormality rates in cVEMP (80%) and oVEMP (60%) tests, with low rates in caloric tests (8%).

    Conclusions:

    • Firecracker blasts cause cochlear and vestibular damage, specifically affecting the saccule and utricle.
    • The findings indicate that blast exposure exacerbates noise-induced damage to both cochlear and vestibular structures.
    • This study highlights the dual impact of firecracker noise on hearing and balance functions.