"Previous research in small mammals has suggested a critical period in development when susceptibility to noise exposure may be greater. Several investigations, using sheep as a model for in utero hearing loss, have provided evidence of fetal hearing changes after noise exposure. Although the reported epidemiological studies concerned with the possibility of fetal hearing loss had limitations, there were some suggestions of noise-induced hearing loss in children whose mothers experienced noise exposure."
https://pubmed.ncbi.nlm.nih.gov/8899911/
Hearing is basically fully formed at 24 weeks.
"Previous research in small mammals has suggested a critical period in development when susceptibility to noise exposure may be greater. Several investigations, using sheep as a model for in utero hearing loss, have provided evidence of fetal hearing changes after noise exposure. Although the reported epidemiological studies concerned with the possibility of fetal hearing loss had limitations, there were some suggestions of noise-induced hearing loss in children whose mothers experienced noise exposure."