THE ARTICULATORY SYSTM

 How do we produce sounds?

 Think for a minute about how people produce sounds. Say a few words and concentrate on what’s happening inside your mouth. The movements of your tongue, lips, and jaw are incredibly quick, delicate, and complex—just as complex as the movements of an Olympic gymnast or a surgeon’s hands. When you think about it, it’s a miracle that anybody can talk at all. So how do we produce speech sounds? When we speak, we push air out of our lungs, up through our throat, and out our mouth or nose. The vibration of our vocal cords, along with movements of our tongue and lips, changes the airflow and produces different sounds. Even a slight change in the position and movements of these parts can make a perceptible change in the sound that is produced.

Process of Speech Production

• Tone generated by larynx is modified, through resonating structures, and is shaped into speech sounds by several structures (tongue and lips). The shaping of speech sounds is know as Articulation
• Pharynx - sounds travels through the nasal, throat and mouth cavities known as the pharynx
  • laryngopharynx - starts above the larynx
  • oropharynx - laryngopharynx connected oropharynx
  • nasopharynx - oropharynx connected to nasoharynx, ends where 2 nasal cavities begin
• Laryngopharynx and oropharynx add resonance to the sounds from the larynx.
• Nasopharynx adds resonance to nasal sound s(m, n, ng). Nasal cavity normally is closed.
• Movement of the tongue, lips, and the larynx will change the shape of the vocal tract and in turn modify the sound emanating from the larynx. During consonant production, the tongue is sometimes used to momentarily occlude the vocal tract for the production of stop sounds like /t/, /d/, /k/, and /g/. Production of sounds like /s/ and /sh/ require the tongue to form a constriction in the vocal tract that will produce noise when air is passed through the constriction.

The articulatory system

The lips are used in the production of several consonant sounds: /p/, /b/, /m/, /w/, /f/, and /v/. The way we move our lips—making them rounded, unrounded, or stretched a bit wide—also affects the sounds of vowels. The teeth are used when we say the consonant sounds /f/ and /v/, with the upper teeth touching the lower lip, and also /θ/ and /ð/, with the tip of the tongue touching the upper teeth. The alveolar ridge is the slightly rough area just behind the top teeth. It can also be called the tooth ridge or the gum ridge. The tongue touches or almost touches the alveolar ridge when we say the sounds /t/, /d/, /s/, /z/, /l/, and /n/. The hard palate is the hard part at the top of the mouth, beginning just behind the alveolar ridge. It can also be called the roof of the mouth. When you close your mouth, your tongue is probably flat against your hard palate. The tongue touches or almost touches the hard palate when we say the sounds /ʃ/, /ʒ/, /ʧ/, /ʤ/, and /y/. The soft palate is the softer part of the roof of the mouth, farther back than the hard palate. It is also called the velum. If you touch the roof of your mouth with your tongue and then keep moving your tongue 3 farther back, you’ll find that softer area. The back of the tongue touches the soft palate when we say the sounds /k/, /ɡ/, and /ŋ/. The tongue is involved in producing almost all the sounds of English, both consonants and vowels. We can also refer to different parts of the tongue: the tip of the tongue, the blade of the tongue, and the back of the tongue. The lower jaw moves up and down to allow the mouth to open and close. Its movement also helps the tongue move to higher or lower positions, and to makes the space inside the mouth bigger or smaller. All of these movements have a great influence on the sounds we produce. The nasal cavity is the space inside the nose where air passes in and out when we breathe through our nose. It can also be called the nasal passage. This area is important in producing the nasal sounds /m/, /n/, and /ŋ/. For these sounds, the air stream moves up and out through the nose instead of the mouth

Teach about the articulatory system

It is important for students of all ages to know the parts of the mouth and how they move when they make sounds. It is much less important for them to memorize the names of the parts of the articulatory system, whether in English or in their mother tongue. We can use tools, models, and illustrations to help students of all ages understand the articulatory system. For example:

• Have students look in a mirror to see how their mouths move, whether or not their lips are rounded, and how open their mouths are. They can compare these things to a picture or the teacher's example.

• Have students touch their throats to feel the vibration of the vocal cords.

• Use a dental model (a set of giant teeth like dentists to show children how to brush their teeth) to show students 4 what is happening inside their mouths. It is much easier to show students where the alveolar ridge is on a model, for example, than to try to get them to look into the teacher's mouth. (It's dark there!)

• Diagrams of the vocal tract, such as the ones we have seen in this chapter, also give

students a visual image of the position of the articulators during speech. This type of diagram is often called a "Sammy" diagram (I don't know why) or a sagittal diagram.

section diagram. However, these diagrams are sometimes difficult for students to understand and connect with reality, especially for younger students.