The Articulators

Articulators transform the sound into intelligible speech. They can be either active or passive. They include the pharynx, the teeth, the alveolar ridge behind them, the hard palate, the softer velum behind it, the lips, the tongue, and the nose and its cavity.

4. The Lips: The lips also play an important role in the matter of articulation. They can be pressed together or brought into contact with the teeth. The consonant sounds which are articulated by touching two lips each other are called bilabial sounds. For example, /p/ and /b/ are bilabial sounds in English. Whereas, the sounds which are produced with lip to teeth contact are called labiodental sounds. In English there are two labiodental sounds: /f/ and /v/.

The tongue is responsible for the production of many speech sounds, since it can move very fast to different places and is also capable of assuming different shapes. The shape and the position of the tongue are especially crucial for the production of vowel sounds. Thus when we describe the vowel sounds in the context of the function of the tongue, we generally consider the following criteria:

• Tongue Height: It is concerned with the vertical distance between the upper surface of the tongue and the hard palate. From this perspective the vowels can be described as close and open. For instance, because of the different distance between the surface of the tongue and the roof of the mouth, the vowel /i: /has to be described as a relatively close vowel, whereas /æ / has to be described as a relatively open vowel.

• Tongue Frontness / Backness: It is concerned with the part of tongue between the front and the back, which is raised high. From this point of view the vowel sounds can be classified as front vowels and back vowels. By changing the shape of the tongue we can produce vowels in which a different part of the tongue is the highest point.