phonetic transcription

online transcriptors

http://www.photransedit.com/online/text2phonetics.aspx

http://www.phonemicchart.com/transcribe/?w=rotten

http://www.e-lang.co.uk/mackichan/call/pron/type.html

practice

http://learningapps.org/204183
http://www.englisch-hilfen.de/en/exercises/pronunciation4/index.php
http://www.learnersdictionary.com/pronex/pronex.htm
https://elt.oup.com/student/englishfile/elementary/c_pronunciation/?cc=pe&selLanguage=en
https://www.ivona.com/
http://www.phonemicchart.com/
http://www.esltower.com/PRONUNCIATION/worksheets/quizzes/Vowel%20sounds%20phonetic%20practice%20test%202%20Quiz.pdf
http://www.bbc.co.uk/worldservice/learningenglish/grammar/pron/sounds/vowel_short_1.shtml

para escuchar la pronunciación
http://www.learnersdictionary.com/help/ipa
http://usefulenglish.ru/phonetics/listening-for-vowel-contrast
http://usefulenglish.ru/phonetics/listening-for-vowels
http://www.stuff.co.uk/calcul_nd.htm