I read this in the spongebob screens that say things like "An eternity later", etc's voice.
Where did you learn the pronunciation symbols? I don't know how to begin looking for a source to learn them from.
Wikipedia has some great resources. This on IPA generally: https://en.wikipedia.org/wiki/International_Phonetic_Alphabet
This on retroflex consonants has very helpful sound clips too: https://en.wikipedia.org/wiki/Retroflex_consonant (search for 'Swedish' within the article)