IRCT20181214041960N1 IRCT 2019-02-06 Zahedan University of Medical Sciences The effect of mother's voice on the pain and anxiety of children The effect of mother's recorded voice on the severity of pain and anxiety in pediatric undergoing surgery 2019-02-20 anticipated 80 Complete https://irct.ir/trial/35937 interventional Randomization: Randomized, Blinding: Not blinded, Placebo: Not used, Assignment: Parallel, Purpose: Supportive, Randomization description: Envelopes containing cards with numbers one and two are given to the participants, if the number one is chosen, they will be assigned to the intervention group. Otherwise they will be assigned to the control group. N/A Condition 1: Preoperative anxiety. Condition 2: Pain Acute. Intervention 1: Intervention group: Mother's voice is used in two stages. The first stage was to reduce the anxiety before surgery and the second time to reduce postoperative pain. According to the request of the child or his mother, the content of the sound includes poetry or regular speech to reduce the child's anxiety. In the second step, the mother is given a written text that she will read it to reduce the pain after surgery. Intervention 2: Control group: The headphones connected to the silent device are placed on the child's ear. No - There is not a plan to make this available Justification or reason for not sharing IPD is No more information.