Hi Sheila:
Sustained vowels are more difficult for those with AD than AB, since in AD the vocal folds tend to be pressed together (adducted) too tight making continuous phonation difficult. With AB, the vocal folds are too far apart (abducted), resulting in the characteristic spasmodic break or breathiness between the unvoiced consonants and the vowels that follow them. So, some sample sentences that should elicit symptoms of each form of SD would be as follows:For AB:
1) He saw half a shape mystically cross fifty or sixty steps in front of his sister Kathy's house
2) She sells seashells by the seashore
3) The puppy bit the tape
4) Poor Harry's kite got torn in the tree
For AD:
1) Early one morning a man and a woman were ambling along a one mile lane running near rainy Island Avenue just before dawn
2) Albert eats eggs every Easter early in the a.m.
3) The bad dog won't let me get near. (not sure about this one - although it does feature words beginning with voiced consonants. I have AB - and so am much less aware of what specifically gives trouble for those with AD)
Those with AD generally have more difficulty with words starting with voiced consonants, such as b, d, g, l, m, n, etc. AB'ers have more trouble with words using unvoiced consonants prior to the vowel - f, h, k, p, s, t, sh, etc.
Hope this helps....
Regards,
Keith
