“…Excessive noise generates adverse effects such as sleep disorders, poor development of responses to stimuli, affectation of the nervous system, growth delays, and even decreased hearing capacity [17]- [19]. Newborns in NICUs are exposed to an overload of sound stimuli from different sources such as the ones generated by the alarms of the medical equipment, telephones, conversations of the medical personnel, the closing, and opening of doors, monitors, incubators, ventilatory circuits, visitors and, cleaning staff shifts, among others [13], [14], [16]- [20]. The majority of reported cases concluded that recorded noise levels exceed the suggested limits by the WHO, the United States Environmental Protection Agency (EPA), and American Academy of Pediatrics (AAP), and/or Ecuadorian environmental regulations such as the Uni ed Text of Secondary Environmental Legislation (TULSMA) [13], [21].…”