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The evidence grows daily that much learning failure results from undetected early childhood hearing problems (Gordon 1977). This is because the child is deprived of the state of acute hearing sensitivity normally present at birth which makes it possible to recognize the loudness levels and duration of each individual sound.
When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.