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I'm not hearing any kind of slender sound in these two words. To my ear, the f in fear and the b in bean sound broad, not slender. Anyone else having that problem? Are they broad, or am I missing something?
They aren't broad. Before -ear and -ean (and -ea- before most consonants), slender f and b are just "normal" f's and b's except you spread your lips as if you were smiling, when you pronounce them.
If you had broad ones (if it were "far" and "ban") you'd hear kind of a very short w sound after the consonant: "fwahr", "bwahn" and the a-sound would be "darker".
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With other words, I can hear a definite glide after a slender f or b, but not with fear and bean.
there aren't glides after all slender consonants, it depends on the following vowel-sound (which may depend on dialect, especially before ll, nn, m).
There are y-glides in beo, feoil, b'fhiú, fiú, (and in Munster, in beann, feall), sometimes in C and M in beá-, feá... But not in other cases (bea-, bi-, bé-...)
But in no living Irish dialect you'd have a y-glide in "fear" nor in "bean" as far as I know, it's always "fahr" and "bahn" (with a short ah-sound).