Phonograms are the "units of sounds." Below is a list of the 70 phonograms in the English Language:
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To hear what each phoneme sounds like, click here then click on "Spalding Phonogram Sounds" in the navigation bar on the left side of the page. This will bring up the sounds for Phonemes 1 - 45. At the bottom of that page are options to reach Phonograms 46 - 58 and Phonograms 59 - 70.