The airway connecting the throat to the nasal air is relatively small, so if there is snot or other foreign objects blocking the air, breathing will make a purring sound, which sometimes sounds a lot like snoring. The baby’s throat whirring suggests phlegm, or it may be laryngeal wheezing caused by congenital laryngeal cartilage dysplasia. If there is phlegm, it is considered to be caused by a cold and a lung murmur will be detected by the doctor’s auscultation. In addition to this there will be other cold symptoms, such as nasal congestion, runny nose and cough. The main symptoms include: bronchiolitis, pneumonia and other diseases in the recovery period, there is phlegm can not be discharged, thus causing the infant’s voice to make a whirring sound, at this time should be given expectorant drugs, and with physical therapy such as patting the back. Congenital laryngeal wheezing is a disease in which the infant’s laryngeal cartilage is defective in development. The laryngeal cartilage collapses and narrows the airway, resulting in a wheezing sound when airflow passes through. Calcium and vitamin D supplements are available to promote early development. This condition requires intensive care, frequent outdoor activities, and sun exposure to promote calcium absorption. As babies get older, it can be cured by about two years of age. If your baby’s voice sounds like a whirring sound, you should go to the hospital to determine what kind of condition it is and treat the symptoms.