Letter ت is a light letter, letter ط is a heavy letter.

Letter ث  is a lisp, Letter س  is similar to “S” in English, Letter ص   is a heavy letter.

Sound of the letter ح   comes from the base of the throat, Letter خ   is a little gruff sound, Letter ه  ia a little “H” in English.

Letter د    is a similar to “D” in English, Letter ض   has its own unique pronunciation.

Letter ذ   is a lisp, letter ز is similar to “Z” in English, letter ظ   is a heavy and lisp letter.

Letter ق is a heavy, letter ك is similar to “K” in English.