The glottal stop, represented by the symbol [ʔ], occurs when the space between the vocal folds (the glottis) is closed completely (very briefly), then released. Try saying the expression Oh oh!. Between the first Oh and the second oh, we typically produce a glottal stop. Some people do it in the middle of Uh-uh (meaning “no”), and others put one in place of “t” when they pronounce Batman quickly. You can also produce a glottal stop if you try to say the words butter or bottle without pronouncing the “-tt-” part in the middle. This sound is considered to be characteristic of Cockney (London) speech. (Try saying the name Harry Potter as if it didn’t have the “H” or the “tt.”) You will also hear glottal stops in the pronunciation of some Scottish speakers and also New Yorkers.

If, however, you are someone who pronounces the word butter in a way that is close to “budder,” then you are making a flap. It is represented by [D] or sometimes [ɾ]. This sound is produced by the tongue tip tapping the alveolar ridge briefly. Many American English speakers have a tendency to “flap” the [t] and [d] consonants between vowels so that, in casual speech, the pairs latter and ladder do not have distinct middle consonants. Nor do writer and rider, metal and medal. They all have flaps. The student who was told about the importance of Plato in class and wrote it in his notes as playdough was clearly a victim of a misinterpreted flap.

This rather lengthy list of the phonetic features of English consonant sounds is not presented as a challenge to your ability to memorize a lot of terminology and symbols. It is presented as an illustration of how a thorough description of the physical aspects of speech production will allow us to characterize the sounds of spoken English, independently of the vagaries of spelling found in written English. There are, however, some sounds that we have not yet investigated. These are the types of sounds known as vowels and diphthongs.