Experts suggest solving it from two angles: first, from the perspective of behavior correction. Language can be regarded as a special behavior. Don't respond to the child when the voice is not loud enough. Only when the sound is loud enough, we will give it back to our children and insist on it for a long time, so that children can understand that what is strengthened is the sound with enough volume. If the voice is low, they can't meet their requirements. Family members should persevere and let children form habitual reflex. If you rely on your understanding of the child, no matter how small his voice is, you can understand his meaning and meet his needs, which is equivalent to strengthening the child's small voice. Second, solve it from the way of thinking. Children must understand a truth, think from each other's point of view and let others listen. Because the distance between the speaker and the listener is different, the other person's hearing sensitivity is different, and whether the environment is quiet or not is different. Different people, speaking on different occasions, must adjust their own volume. In a noisy shopping mall, even if you talk to your mother, you should speak louder. Although you are quiet at home, you should talk to your grandmother loudly.