Infant sleep machines have become a popular aid for parents with a baby getting inadequate sleep due to a busy household, loud neighbors, or other noise disturbances. But a new study says parents should be cautious with the devices because they can generate sound levels that could place infants at risk of developing noise-induced hearing loss. In addition, they are often sold with limited or no instructions for safe use according to an otolaryngologist’s report in the journal Pediatrics. For more information