The sound of a factory iron door opening can be described as a rough and heavy sound. It can make a loud, strong noise when the door is moved, creating a strong vibration. This is a strong, powerful sound, often evoking the image of the opening of a large, industrial space. Footsteps are often described as gentle, continuous and regular sounds. It can create steady rhythms, like footsteps on the floor or street. Sometimes, it can also evoke a feeling of slowness and peace, especially when the person walking is light and alert.