The buildings we design should help us use our senses comfortably and efficiently. We can easily block out unwanted sights by closing our eyes or turning away, but we can't stop our ears from hearing, and we receive unwanted sounds with little regard for the direction we face. Loud sounds can damage our hearing, especially over time. We have trouble hearing sounds that are much less intense than the background noise. The art and science of acoustics addresses how these issues affect the built environment.
Our eyes can be damaged if we look even quickly ¿Q; at the sun, or for too long at a bright snow landscape or light-colored sand. Direct glare from lighting fixtures can blind us momentarily. Interior designers should avoid strong contrasts that can make vision difficult or painful, for example, a very bright object against a very dark background or a dark object against light. Low illumination levels reduce our ability to see well. The adjustment to moderately low light levels can take several minutes, an important consideration when designing entryways between the outdoors (which may be very bright or very dark) and the building's interior. Lighting levels and daylighting are important parts of interior design.
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