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Voiceless postalveolar fricative - Wikipedia
Esh (letter) - Wikipedia
Voiceless postalveolar affricate - Wikipedia
/ʃ/ (push, show) - American English Sounds
The /ʃ/ Sound - YouTube
Consonant phonemes /ʒ/, /ʃ/ - English Wiki
ʃ - Wiktionary, the free dictionary
SH - The Whisper Sound - Pronunciation Studio
ʃ Sound: How to pronounce the sh sound (/ʃ/ Phoneme)
/ʃ/ - SH Sound Pronunciation Guide (British) - YouTube