Darcy
Darcy is studying at the kitchen table. Her brothers are watching the hockey game in the living room. When Darcy first sat down to study, the noise of the game was distracting, but now she doesn't really notice it at all. As she reads through her notes, Darcy also doesn't seem to notice all the little spelling errors she made when she was writing them down in class. Instead, she reads the words and sentences clearly and can focus on the concepts and examples rather than her mistakes. After a while, Darcy reaches out and grabs her water glass and takes a drink. Just then, her brothers started yelling when their team scores. Startled, Darcy dropped the glass onto her baby toe, which sends pain shooting up her leg. Although Darcy is momentarily distracted, she goes back to her books and is focused on her studies again within about 20 minutes.
What increases led to Darcy being startled when Darcy's brothers started yelling?
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frequency of the sound◦
amplitude of the sound◦
purity of the sound◦
timbre of the sound
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