some one help me to define phonetic symbol?
Here are several websites with explanations and examples of phonetic symbols for English:
http://www.antimoon.com/how/pronunc-soundsipa.htm
http://esl.about.com/library/weekly/aa040998.htm
And here are many images from which to choose what you need:
http://www.google.com/images?rlz=1C1GGGE_enUS379US379&q=phonetic+symbol&um=1&ie=UTF-8&source=univ&ei=4NYZTYKkIIWBlAeC1czcDA&sa=X&oi=image_result_group&ct=title&resnum=2&ved=0CC0QsAQwAQ&biw=1361&bih=614