Sound is very important to the images in a film comprising the sounds generated by actions within a scene. In addition to dialog, sound may include footsteps, breathing, the creaking of a leather jacket, the buzzing of a fly or some other noise. During shooting, absolute silence must prevail, so the sound man can record only intended sounds. Especially when shooting at an outdoor location, noise is a common problem; the filming can take a long time as pauses for passing aircraft or noisy children out of earshot are common on location for example