The working principle of sound in the room (1): the transmission of sound
May 06,2021
Voice is a common and frequently used word. When an object vibrates, sound waves are generated around it, and the sound waves continue to spread outward and are heard by people as sound. The lower limit of human hearing is defined as 0db (decibel), normal speech is about 70db, and the upper limit of hearing is 120db, which will cause earache and is unbearable. Sounds above 140db will make people l...