Bilabials These are sounds formed using both (= bi) upper and lower lips (= labia). The initial sounds in the words pat , bat and mat are all bilabials . They are represented by the symbols [p], which is voiceless, and [b] and [m], which are voiced. We can also describe the [w] sound found at the beginning of way , walk and world as a bilabial. Labiodentals These are sounds formed with the upper teeth and the lower lip. The initial sounds of the words fat and vat and the final sounds in the words safe and save are labiodentals . They are represented by the symbols [f], which is voiceless, and [v], which is voiced. Notice that the final sound in the word cough , and the initial sound in photo , despite the spelling differences, are both pronounced as [f]. Dentals These sounds are formed with the tongue tip behind the upper front teeth. The initial sound of thin and the final sound of bath are both voiceless dentals . The symbol used for this sound is [ θ ], usually refer...