Design Background: Babies do not express themselves in words until they are 1 years old. Crying is one of their most instinctive and effective methods. Therefore, parents with hearing impairment have unavoidable problems. Solution: SILENT ANGEL analyzes 5 modes according to the baby's different sounds. Such as hunger, sadness, illness, urination and happiness. It consists of two parts: a cushion worn by the baby and a bracelet worn by the parents. The baby's wearing pad has a built-in microphone and voice emotion calculation module to capture the baby's voice and convert the baby's voice into their physical or psychological needs. The signal is then sent to the bracelet worn by the parents, vibrating and visually displaying the information.