Welcome to the forum, The apprentice.
I have made a few comments on your post.... than what?The Schwa Sound is shorter in length, lower in intensity and different in quality,If you are saying that the phonemic symbol /ə/ is used for a range of sounds, you are right. The same is true of all phonemic symbols. Only narrow phonetic transcription represents a precise sound.The Schwa Sound is not an exact sound because vowels have not the same sound;... as what?does not have the same durationNo. The schwa sound is a result of the loss of other vowel qualities when a syllable is unstressed.The Schwa Sound allows unstressed syllable to be said more quickly so that the main beat of a spoken word be easier to to be pronounced and heard.The primary word stress is on the fourth syllable, the secondary on the second (containing /ʌ/). Neither schwa is stressed at all. The final syllable may be pronounced as a syllabic /n/ - i.e., there is virtually no vowel sound.PRONUNCIATION; it has a secondary stressThe vowels of the first two syllables are /ʌ/. The vowel of the third syllable is schwa, unstressed (as it always is). The final syllable may have a schwa or a syllabic /l/.UNCOMFORTABLE; it is unstressedThe vowel of the first syllable is /ʌ/.The vowel of the third syllable is schwa, unstressed (as it always is). The final syllable may have a schwa or a syllabic /l/.UNCOUNTABLE; it is unstressedThe first syllable, with the vowel/ʌ/, bears the secondary stress; the second syllable has schwa, the final syllable bears the primary stress
UNDERLINE; it has a primary stressDo not confuse letters with sounds.2°) I have also noticed that the short u sound occurs in the vowel '' o '' as well, but in this case when the '' o '' is a short u sound the stress is on that vowel;The first syllable, with the vowel /ʌ/, bears the primary stress.COMFORTABLE; It has a primary stress on the first '' o ''The first or only syllable, with the vowel /ʌ/, bears the primary stress. The second vowel in 'mother' and 'other' is schwa.
MOTHER; NONE; OTHER; All have a primary stress.