A child’s voice that makes a noise when breathing is often caused by inflammation, infection or certain diseases, which have an impact on the smoothness of breathing and should not be taken lightly. If the child is a newborn, and the voice noise has been appearing since birth, it is very likely that the baby suffers from congenital laryngeal cartilage disease, such as laryngeal cartilage chondromalacia. A child with this disorder will make a grunting sound due to the abnormal development of the laryngeal cartilage and the high vibration when breathing, which can be determined by doing certain tests on the newborn. In addition, infections, such as bronchitis or pneumonia caused by viruses and mycoplasma, can cause excessive phlegm to be produced, which can obstruct the airways and cause the voice to rumble. This can be treated by giving your child some anti-inflammatory and phlegm-reducing oral medication. The child suffers from pharyngitis or chronic pharyngitis, resulting in more pharyngeal secretions, will also have this phenomenon. Antibiotics such as amoxicillin can be taken to treat this, but you should consult a medical professional about the specific medication and its use, and not use the medication yourself. Pharyngitis, infections or congenital disorders can cause a child’s voice to rattle, and tests can be performed to determine the cause, which can then be treated according to the type of disorder.