A floating tone is a

morpheme A morpheme is the smallest meaningful constituent of a linguistic expression. The field of linguistic study dedicated to morphemes is called morphology. In English, morphemes are often but not necessarily words. Morphemes that stand alone ar ...

or element of a morpheme that contains neither

consonant In articulatory phonetics, a consonant is a speech sound that is articulated with complete or partial closure of the vocal tract. Examples are and pronounced with the lips; and pronounced with the front of the tongue; and pronounced ...

s nor

vowel A vowel is a syllabic speech sound pronounced without any stricture in the vocal tract. Vowels are one of the two principal classes of speech sounds, the other being the consonant. Vowels vary in quality, in loudness and also in quantity (l ...

s, but only tone. It cannot be pronounced by itself but affects the tones of neighboring morphemes. An example occurs in Bambara, a Mande language of Mali that has two

phonemic In phonology and linguistics, a phoneme () is a unit of sound that can distinguish one word from another in a particular language. For example, in most dialects of English, with the notable exception of the West Midlands and the north-wes ...

tones, ''high'' and ''low.'' The

definite article An article is any member of a class of dedicated words that are used with noun phrases to mark the identifiability of the referents of the noun phrases. The category of articles constitutes a part of speech. In English, both "the" and "a(n)" ...

is a floating low tone, and with a noun in isolation, it is associated with the preceding vowel and turns a high tone into a falling tone: á''river;'' â''the river''. When it occurs between two high tones, it downsteps the following tone: * ''it's not a river'' * (or ) ''it's not the river'' Also common are floating tones associated with a segmental morpheme such as an affix. For example, in Okphela, an Edoid language of Nigeria, the main negative morpheme is distinguished from the present tense morpheme by tone; the present tense morpheme (á-) carries high tone, whereas the negative past morpheme (´a-) imposes a high tone on the syllable which precedes it: *oh á-nga ''he is climbing'' *óh a-nga ''he didn't climb'' Floating tones derive historically from morphemes which assimilate or lenite to the point that only their tone remains.Trutenau, H.M.J. 1972. "A sketch of tone rules required for a generative transformational grammar of Ga (a terraced level tone language)." Linguistics 79: 83-96.

References

Tone (linguistics) {{phonetics-stub