Even when sounds originate in the same room, they are often obstructed by objects like furniture before they reach a person's ears. However, because the sound remains in the same room as the listener, the reverberation effect on these sounds will not be muffled - reverberation will spread round a whole room regardless of individual obstructions.
Any man-made objects, except objects that define out-of-bounds, or a construction that is ruled to be a part of the course.
Any restriction or foreign object that reduces or modifies the cross section of the pipe to the extent that gas flow is affected or in-line inspection pigs can become stuck (ovality, collapse, dents, undersized valves, wrinkles, bends, weld drop through). Also any foreign object in the pipeline. (See pipe collapse)
Anything man-made that hinders play
Anything which substantially prevents the public from having access over the whole of the highway which is not purely temporary in nature may be an unlawful obstruction.
An "obstruction" is anything artificial, including the artificial surfaces and sides of roads and paths and manufactured ice, except: a. Objects defining out of bounds, such as walls, fences, stakes and railings; b. Any part of an immovable artificial object which is out of bounds; and c. Any construction declared by the Committee to be an integral part of the course.