Why is it not a good idea to keep your mouth closed when you hear harsh, strong sounds?

1) in the middle ear there is an auditory tube that connects the middle ear cavity with the nasopharynx
2) when the mouth is open, the pressure on the eardrum is equalized from the outside and inside

Remember: The process of learning a person lasts a lifetime. The value of the same knowledge for different people may be different, it is determined by their individual characteristics and needs. Therefore, knowledge is always needed at any age and position.