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36. The definition of intonation. Speech melody as a component of English intonation.

Melody. Each syllable of the speech chain has a special pitch colouring. Some of the syllables have significant moves of tone up and down. Pitch movements are inseparably accompanied with variations in loudness. It can be explained by the fact that on the acoustic level pitch correlates with the fundamental frequency of the vibration of the vocal cords; loudness correlates with the amplitude of vibrations. The pitch parameters include the distinct variations in the direction of pitch, pitch level, pitch range and pitch angle, or rate.

Pitch range is the interval between two pitch levels or two differently-pitched syllables or parts of a syllable. The pitch range of a whole syntagm is the interval between the highest-pitched and the lowest-pitched syllables. Variations in pitch range occur within the normal range of the human voice, i.e. within its upper and lower limits. The whole range may be normal, which is used in unemphatic delivery, wide and narrow which are brought into use in emphatic speech. These ranges, even in the case of an individual speaker, are not fixed, either absolutely or relatively to one another. They may, according to circumstances, be shifted slightly up or down, or expanded or contracted to a moderate degree.

Within the normal range of the speaking voice, i.e. within the interval between its lower and upper limits in unemphatic speech, most phoneticians distinguish three pitch levels: low, mid (or medium), and high. These pitch levels are, of course, relative, not absolute: a man’s voice produces the three in a lower register than a woman’s. There exist not only the obvious differences in the pitches used by men and women respectively, but also the smaller though noticeable differences between individuals of the same sex. In emphatic and emotional speech an extra high and an extra low pitch levels may be distinguished in addition to the three unemphatic pitch levels. The pitch level of a whole syntagm is determined by the pitch of its highest-pitched syllable which, in unemphatic speech, is usually the first stressed syllable of the syntagm.

Pitch ranges should not be confused with pitch levels, although the two are closely interdependent. For instance, the pitch range between two syllables or two parts of a syllable is narrow when the first of them is pronounced on a high level and the second on a mid level or the first on a mid level and the second on a low level. But the pitch range is wide, when the first syllable is pronounced on a high level and the second on a low one. The more the height of the pitch contrasts within the intonation pattern the more emphatic the syntagm sounds.

The significant change in pitch direction takes place in the nucleus where the pitch goes distinctly up or down. In terms of pitch ranges the high-falling tone is a tone with a wide pitch range (from high to low), whereas a low-falling tone has a narrow pitch range (from mid to low).

In English there are also cases when no audible nuclear tone movement precedes a syntagm boundary. In such a circumstance one may consider it to be the level nuclear tone. The tone of a nucleus determines the pitch of the rest of the intonation pattern following it which is called the tail. Thus after a falling tone, the rest of the intonation pattern is at a low pitch. After a rising tone the rest of the intonation pattern moves in an upward pitch direction. The nucleus and the tail form what is called terminal tone. The pre-nuclear part, consisting of the pre-head and the head can take a variety of pitch patterns. Variation within the pre-nucleus does not usually affect the grammatical meaning of the utterance, though it often conveys meanings associated with attitude or phonetic styles. The pitch of the pre-nuclear part may gradually descend or ascend to the nucleus or stay more or less on the same level. The pitch pattern of a syntagm is formed by the combination of the pitch movements in the nucleus and in the pre-nuclear part within a pitch range of different pitch levels.

The changes of pitch are not haphazard variations. The rules of such changes are highly organized. No matter how variable the individual variations of this prosodic component are they tend to become formalized or standardized, so that all speakers of the language use them in similar ways under similar circumstances.

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