This study aimed to determine the effect of maternal voice on physiological indicators and oral feeding performance in preterm infants. Hypothesis 1 (H1): Preterm infants who listen to their mother's voice throughout the full oral feeding process have higher oxygen saturation levels than those who do not. Hypothesis 2 (H2): Preterm infants who listen to their mother's voice throughout the full oral feeding process have lower heart rates than those who do not. Hypothesis 3 (H3): Preterm infants exposed to maternal voice throughout the full oral feeding process have lower respiratory rates than those who are not exposed. Hypothesis 4 (H4): Preterm infants exposed to maternal voice throughout the full oral feeding process have better feeding maturation than those who are not exposed. Hypothesis 5 (H5): The percentage of nutrient intake in preterm infants exposed to maternal voice throughout the entire oral feeding process is higher than in those not exposed. Hypothesis 6 (H6): The feeding time of preterm infants exposed to the mother's voice throughout the entire oral feeding process is shorter than that of those not exposed. Hypothesis 7 (H7): The amount of food consumed per minute by preterm infants exposed to the mother's voice throughout the entire oral feeding process is greater than that of those not exposed.
Age range
1 Day – 28 Days
Sex
ALL
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Change in Oral Feeding Performance
Timeframe: The first day the infant transitions to full oral feeding and the 5th day will be evaluated. The change between these time points will be assessed.
Change in oxygen saturation
Timeframe: Oxygen saturation will be measured once daily for five days. Data will be collected immediately before, during, immediately after feeding. The change in these time intervals will be assessed.
Change in heart rate
Timeframe: Heart rate will be measured once daily for five days. Data will be collected immediately before, during, immediately after feeding. The change in these time intervals will be assessed.
Change in respiratory rate
Timeframe: Respiratory rate will be measured once daily for five days. Data will be collected immediately before, during, immediately after feeding. The change in these time intervals will be assessed.
Change in Oral Feeding Skills
Timeframe: The first day the infant transitions to full oral feeding and the 5th day will be evaluated. The change between these time points will be assessed.