it's like 2003 7.61 124 2003 est. 2004 7.73 119 1.58 % 2004 est. 2005 7.73 118 0.00 % 2005 est. 2006 7.8 117 0.91 % 2006 est. 2007 7.86 112 0.77 % 2007 est. 2008 7.61 118 -3.18 % 2008 est. 2009 7.74 115 1.71 % July 2009 est. 2010 7.74 112 0.00 % July 2009 est. for the record only 2008 shown the negative aspects. this year is pretty good.
By week 16 (gestational age), although the bones and tissue that make up your babyâs ears are in place, it is still a few more weeks before the nerves conducting sound become functional, at around 20 weeks gestational age.
At birth, they prefer complex sounds like noises and voices, to pure tones. Babies only a few days old can tell the difference between a variety of sound patterns. Over the first year, infants organize sounds into increasingly elaborate patterns. Around 2 to 4 months, they can distinguish changes in tempo. Between 4 and 7 months, they show a sense of musical phrasing. Around 6 to 7 months, they can distinguish musical tunes on the basis of variations in rhythmic patterns.