Ancient Hebrew writing is very compressed, nikudot are used only in small set of texts used for special purposes. It is unlikely, that these special letters are used to distinguish similar sounding words, most likely that the words, with these letters present, sounded differently from similar words, without these letters in them. Hence, these special letters were used together with nikudot to denote special vowels. In writing this trick of language is presented as nikudot patah associated with the last letter. One such block can include a few vowels.
Basic state allows flow of air, it produces a soft boundary.
Similarly, a secondary emphasis cannot precede a hard boundary. S hewa is a hint of a vowel. It is vocalized and short. It cannot carry emphasis. From the semantic analysis we can find in interesting cases, when instead of states, called by the language patterns, we find other states in the word, caused by phonetics.