A phoneme is a sound unit that can distinguish one word from another in a language; for example, the difference between the initial sounds of 'pat' and 'bat' shows that the two are distinct phonemes in English.

Why decompose phonemes into features?

Decomposing phonemes into distinctive features lets phonology refer to natural classes—groups of sounds that pattern together, such as all voiced sounds—and state generalizations more simply than by listing individual phonemes.

Phonemes and Distinctive Features

Phonemes are the contrastive sound units of a language, and distinctive features are the smaller phonetic properties out of which phonemes are built and by which they contrast.

Definition

The study of the contrastive sound units of languages (phonemes) and the sub-segmental features that define and differentiate them.

Scope

This area covers the foundational concepts of phonological analysis: the phoneme as a unit that distinguishes meaning, the allophones that realize it in different contexts, and the methods—minimal pairs, complementary distribution—used to establish phonemic inventories. It then treats distinctive feature theory, in which phonemes are decomposed into binary or privative features such as voicing, nasality, and place features, allowing natural classes and contrasts to be expressed economically. It also covers the notions of contrast and neutralization. The treatment is descriptive and analytic.

Sub-topics

Core questions

What makes a sound contrastive, and how is the phoneme defined?
How are phonemes related to their allophones?
What are distinctive features and why decompose phonemes into them?
How do contrast and its neutralization shape sound systems?

Key theories

Distinctive feature theory: The view, developed by Jakobson, Fant, and Halle and recast by Chomsky and Halle, that phonemes are bundles of smaller features, allowing phonological generalizations to refer to natural classes defined by shared features.
The phoneme and functional contrast: Trubetzkoy's structuralist account of the phoneme as the minimal unit capable of distinguishing meaning, with oppositions classified by their logical and functional relations within a system.

History

The phoneme concept was developed by the Prague School, especially Trubetzkoy, and by American structuralists in the early twentieth century. Jakobson, Fant, and Halle introduced acoustically grounded distinctive features in 1952, and Chomsky and Halle's 1968 Sound Pattern of English placed features at the center of generative phonology.

Debates

Reality and universality of distinctive features: Scholars debate whether distinctive features are universal innate primitives or emergent, language-specific abstractions, and whether they should be defined acoustically, articulatorily, or abstractly.

Key figures

Nikolai Trubetzkoy
Roman Jakobson
Morris Halle
Noam Chomsky

Seminal works

jakobson1952
chomsky1968
trubetzkoy1969

Frequently asked questions

What is a phoneme?: A phoneme is a sound unit that can distinguish one word from another in a language; for example, the difference between the initial sounds of 'pat' and 'bat' shows that the two are distinct phonemes in English.
Why decompose phonemes into features?: Decomposing phonemes into distinctive features lets phonology refer to natural classes—groups of sounds that pattern together, such as all voiced sounds—and state generalizations more simply than by listing individual phonemes.