Natural sounds have surrounded a person from the moment of his appearance on Earth, they are familiar and cause positive emotions. The noise of traffic, loud music, working equipment and other city sounds can subconsciously serve as a signal of danger, can increase the heartbeat, respiratory rhythm, affect the work of internal organs and cause psycho-emotional stress.
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.