Hazards of noise exposure on fetal hearing.
Level 5 - mechanism / opinion, no new human data
Narrative review synthesizing animal models and limited human observational data
PubMed 8899911 · doi:10.1016/s0146-0005(96)80054-1
What was done
This review examined background evidence on the risks of prenatal maternal noise exposure to fetal auditory development. It synthesized findings from developmental physiology, small mammal studies, sheep models of in utero hearing loss, and available human epidemiological reports.
What was found
The abstract provides no numerical data or quantitative effect sizes. It reported that small mammal models identified critical developmental windows of increased vulnerability to noise, sheep models demonstrated fetal hearing changes after noise exposure, and limited epidemiological studies suggested potential noise-induced hearing loss in children exposed to noise in utero.
Why it matters
Clear clinical guidance on safe noise exposure thresholds during pregnancy has been limited due to sparse evidence. This review summarizes the developmental and preliminary epidemiological rationale for considering fetal auditory susceptibility to maternal noise.
Limits
The abstract reports no sample sizes, specific decibel thresholds, or quantitative metrics. The underlying evidence base relies heavily on animal models (small mammals and sheep), and the cited human epidemiological studies had acknowledged limitations with sparse conclusive data.
Cited by
- supports Numerous human and animal studies show that younger individuals and animals are more vulnerable to noise-induced hearing damage than adults.