The infant will receive music therapy over 3 consecutive days and will obtain standard care as usual

The infant does not receive any sound emission because the headphone will be turned off and will obtain standard care as experimental

music selected by musician

near-infrared spectroscopy to monitor brain oxygen saturation

electroencephalogram to monitor brain electronic activity, using Burdjalov developed cerebral function monitoring scoring system which including: (1)record continuity: assessed through observing the overall density of the sample tracing, scores ranged from 0 to 2；(2) presence of cyclic changes：refers to the emergence and progression of periods during monitoring，scores ranged from 0 to 5；（3）degree of voltage amplitude depression：estimated as the average lower microvolt level during the recording epoch ，scores ranged from 0 to 2；（4）bandwidth：reflects a combination of the voltage span (peak-to-trough) of the tracing and the magnitude of the electroencephalogram depression，scores ranged from 0 to 4. The minimum possible total score was 0, and the maximum was 13. Scores progressively increased with central nerve system maturation.