In speech,

phonetic Phonetics is a branch of linguistics that studies how humans produce and perceive sounds or, in the case of sign languages, the equivalent aspects of sign. Linguists who specialize in studying the physical properties of speech are phoneticians ...

pitch reset occurs at the boundaries (

pausa In linguistics, pausa (Latin for 'break', from Greek παῦσις, ''pâusis'' 'stopping, ceasing') is the hiatus between prosodic declination units. The concept is somewhat broad, as it is primarily used to refer to allophones that occur in ...

) between

prosodic unit In linguistics, a prosodic unit is a segment of speech that occurs with specific prosodic properties. These properties can be those of stress, intonation (a single pitch and rhythm contour), or tonal patterns. Prosodic units occur at a hie ...

s. Over the course of such units, the median pitch of the voice declines from its initial value, sometimes reaching the lower end of the speaker's vocal range. Then, it must reset to a higher level if the person is to continue speaking. In non-tonal languages, the sudden increase in pitch is one of the principal auditory cues to the start of a new prosodic unit. In

register tone Register or registration may refer to: Arts, entertainment, and media Music * Register (music), the relative "height" or range of a note, melody, part, instrument, etc. * ''Register'', a 2017 album by Travis Miller * Registration (organ), ...

languages which experience discrete

downdrift In phonetics, downdrift (also known as ''automatic downstep'') is the cumulative lowering of pitch in the course of a sentence due to interactions among tones in a tonal language. Downdrift often occurs when the tones in successive syllables are ...

, pitch reset is required as the tones approach the lower end of the speaker's comfort range, and in those languages which experience

tone terracing Tone terracing is a type of phonetic downdrift, where the high or mid tones, but not the low tone, shift downward in pitch ( downstep) after certain other tones. The result is that a tone may be realized at a certain pitch over a short stretch of ...

, it is in addition required in order to maintain the tonal distinctions of the language.

See also