If the sound is too loud, it may lead to children's deafness. It's good to watch movies at home. The sound effect of surround sound and subwoofer is no worse than that in the cinema. According to the statistics of clinical medical data, the possibility of deafness caused by living in a noise environment above 80 dB is up to 50%.
Expert speech: the noise produced by the stereo can be as high as 80 decibels, which is equivalent to the sound made by a lawn mower. This decibels can directly damage the hearing. Medical research shows that family noise is one of the causes of children's deaf mute, and noise can also affect children's intelligence and physical development.
Protection: the total volume of the sound is controlled at 1 / 4-1 / 3 of the maximum volume. In addition, every time after listening to music, develop the habit of turning the volume adjustment knob to the minimum, so that the next time you turn on the phone, you won't have to make noise with the music and scare yourself.