Smart Start of New Hanover County,
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3757288/
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3757288/
New study finds background noise makes a difference in a child's ability to…
http://journal.frontiersin.org/article/10.3389/fpsyg.2013.00578/full#h5