Template knot disallowed for unauthenticated users.
pronounce continuous AAAA , EEEE , IIII and OOOO waves
put a finger in front of Your lips; start voicng a vowel sound; while doing so, make Your lips touch Your finger; what do You notice
pronounce PA PA PA and BA BA BA
pronounce MA MA MA
pronounce TA TA TA and DA DA DA
pronounce NA NA NA
pronounce FA FA FA and VA VA VA
...in all cases, try to answer questions: what is similar ? what is different ?