Mid-term 1 in English Phonetics and Phonology
Complementary distribution phonetic units that never occur in the same
environment are said to be in complementary distribution. For example, clear/l/ and
dark/l/.
NB! The sounds we produce and hear are continuous: we move our organs of
speech continuously and produce a continuous signal still it is possible to divide
speech into units, which is called segmentation.
The sounds of languages can be produced by:
pushing air out of the lungs through the vocal tract (pulmonic, egressive)
sucking the air into the mouth (ingressive)
NB! Without air we cannot produce sound.
There are two classes of sounds:
consonants
vowels
Consonants are produced with some restriction or closure in the vocal tract that
impedes the flow of air from the lungs.
Vowels are produced so that the airstream is relatively unobstructed.
NB! Any speech sound will always exhibit two components in some form or other:
An activity that initiates a flow of air (i.e