"Impurities Of Letters And Their Effect On Voiceless And Voiced Sounds: An Analytical Study"

Tajweed scholars were interested in the acoustic lesson and were interested in studying the acoustic phenomena that arise casually from the convergence or juxtaposition of two letters in one or two words. The criterion of strength is the character trait of the letter, so the strong pulls the weak into its space, generating other sounds called impurities, sounds of impurities, or the impurities of letters. This mixing results in the generation of a third sound that simulates the two mixed sounds, which is afraid of falling into the phonetic error that leads to the semantic error towards the deviation of the sound of the X to the sound of the Zai, the sound of the D to the sound of the T, and so on. The research aims to uncover the imperfections of the letters, which are part of the hidden melody, as there is a general and special relationship between them. All the imperfections of the letters are of the hidden melody and not vice versa. This term is used to denote a special meaning related to the qualities of the letters that may be affected by neighboring sounds. When two letters are adjacent, as we said, one of them is strongly distinguished from the other in some of its qualities, this results in a change in the pronunciation of the letter's sound and the appearance of impurity, because one of the rules of linguistic phonology is that if the sounds are adjacent in speech, they are affected by each other.