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Aside from the Invention of Writing, Perhaps the Greatest Advance

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Aside from the invention of writing, perhaps the greatest advance made by the early Mesopotamians was in


Definitions:

High-Frequency Sounds

Sounds that have a high pitch, typically those with a frequency of 2,000 Hz (Hertz) or higher, often beyond the range of human hearing as age increases.

Hearing Aid

A device designed to improve hearing by making sound audible to a person with hearing loss.

Adapt

The process of adjusting to new conditions or environments.

Dim Light

Low, insufficient lighting that makes vision difficult.

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