Otolaryngology (dealing with the ear, nose and throat) researchers from the University of California Irvine, tested 10 of the loudest toys available in stores and found that they exceed 90 deciBels and several reached 100 or more deciBels.
http://ummid.com/news/2011/December/19.12.2011/toys_on_hearing.htm
http://ummid.com/news/2011/December/19.12.2011/toys_on_hearing.htm
