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Fetal and Pediatric Pathology Volume 40, 2021 - Issue 4
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Research Article

Negative Effects of Noise on NICU Graduates’ Cochlear Functions

Serdar Bekena Acibadem Mehmet Ali Aydinlar University, Department of Pediatrics, Division of Neonatology, Istanbul, Turkey;b Gazi University, Department of Pediatrics, Division of Neonatology, Ankara, TurkeyCorrespondence[email protected]
,
Esra Önalb Gazi University, Department of Pediatrics, Division of Neonatology, Ankara, Turkey
,
Bülent Gündüzc Gazi University, Department of Otorhinolaryngology, Head & Neck Surgery, Audiology Subdivision, Ankara, Turkey
,
Ufuk Çakirb Gazi University, Department of Pediatrics, Division of Neonatology, Ankara, Turkey
,
İrfan Karagözd Gazi University, Department of Electrical and Electronics Engineering, Ankara, Turkey
&
Yusuf Kemal Kemaloğluc Gazi University, Department of Otorhinolaryngology, Head & Neck Surgery, Audiology Subdivision, Ankara, Turkey
Pages 295-304 | Received 29 Oct 2019, Accepted 09 Dec 2019, Published online: 25 Jan 2020
 
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Abstract

Aim

To evaluate the adverse effects of noise on hearing. Methods: Thirty-two infants that had been admitted to neonatal intensive care unit (NICU) and 25 healthy controls were included in this study. Noise levels were recorded continously during the hospitalization period. Results: All healthy controls passed the hearing screening tests before discharge and on the sixth-month follow up. Hospitalized infants had lower “Distortion Product Auto Acoustic Emission Signal Noise Ratio” (DPOAE SNR) amplitudes (dB) at five frequencies (1001, 1501, 3003, 4004, 6006 Hz in both ears). DPOAE fail rates at 1001 Hz and 1501 Hz were higher than in hospitalized infants (81.8% and 50.0% vs 20.0% and 4.0%). Infants who failed the test at 1001 and 1501 Hz were exposed to noise above the recommended maximum level for longer periods of time. Conclusion: Hearing tests performed at sixth-months of life were adversely affected in NICU graduates.

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