This page teaches controlled sound targets from our reviewed catalogue. It does not claim one universal whole-word IPA transcription: the sounds in a word can vary by speaker and target variety.
Reviewed sound focus
/s/
Received Pronunciation (British) · Cockney (British) · General American
Tongue tip near the ridge, narrow groove, hiss the air out.
Common slip: No universal substitution is claimed; compare the recording with the target-accent reference.