By studying perceptions, researchers can identify potential environmental hazards that threaten the senses. Studying perception has also enabled people to develop devices that ensure optimal performance of the senses. For example, on a daily basis, one's senses rely on such manufactured objects as telephones, clocks, televisions, and computers. To be effective, these devices must be tailored to the human sensory systems.
The study of sensations and perceptions has also made it possible to build and develop prosthetic devices to aid individuals with impaired sensory function. For example, hearing aids amplify sound for hard-of-hearing individuals; however, when all sounds are amplified to the same degree, it is often difficult for people to discriminate between sounds. From the work of Richard Gregory, a British psychologist, an instrument was developed that would amplify only speech sounds, thus allowing a person to attend more adequately to conversations and tune out background noise.
Finally, understanding perception is important for comprehending and appreciating the perceptual experience called art. When knowledge of perception is combined with the process of perceiving artistic works, this understanding adds an additional dimension to one's ability to view a work of art.
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