The term stiff voice describes the pronunciation of consonants or vowels with a

glottal opening The glottis is the opening between the vocal folds (the rima glottidis). The glottis is crucial in producing vowels and voiced consonants. Etymology From Ancient Greek ''γλωττίς'' (glōttís), derived from ''γλῶττα'' (glôtta), ...

narrower, and the

vocal folds In humans, vocal cords, also known as vocal folds or voice reeds, are folds of throat tissues that are key in creating sounds through vocalization. The size of vocal cords affects the pitch of voice. Open when breathing and vibrating for speec ...

stiffer, than occurs in

modal voice Modal voice is the vocal register used most frequently in speech and singing in most languages. It is also the term used in linguistics for the most common phonation of vowels. The term "modal" refers to the resonant mode of vocal folds; that is ...

. Although there is no specific IPA

diacritic A diacritic (also diacritical mark, diacritical point, diacritical sign, or accent) is a glyph added to a letter or to a basic glyph. The term derives from the Ancient Greek (, "distinguishing"), from (, "to distinguish"). The word ''diacriti ...

for stiff voice, the voicing diacritic (a subscript wedge) may be used in conjunction with the symbol for a

voiced consonant Voice or voicing is a term used in phonetics and phonology to characterize speech sounds (usually consonants). Speech sounds can be described as either voiceless (otherwise known as ''unvoiced'') or voiced. The term, however, is used to ref ...

. In Bru, for example, stiff-voiced vowels have tenseness in the glottis and pharynx without going so far as to be

creaky voice In linguistics, creaky voice (sometimes called laryngealisation, pulse phonation, vocal fry, or glottal fry) refers to a low, scratchy sound that occupies the vocal range below the common vocal register. It is a special kind of phonation in which ...

d, whereas slack-voiced vowels are lax in the glottis without going so far as to be

breathy voice Breathy voice (also called murmured voice, whispery voice, soughing and susurration) is a phonation in which the vocal folds vibrate, as they do in normal (modal) voicing, but are adjusted to let more air escape which produces a sighing-like ...

. One language with stiff voice is Thai: Javanese contrasts stiff and

slack voice Slack voice (or lax voice) is the pronunciation of consonant or vowels with a glottal opening slightly wider than that occurring in modal voice. Such sounds are often referred to informally as lenis or half-voiced in the case of consonants. In s ...

d bilabial, dental, retroflex, and velar stops: Mpi (

Loloish The Loloish languages, also known as Yi in China and occasionally Ngwi or Nisoic, are a family of fifty to a hundred Sino-Tibetan languages spoken primarily in the Yunnan province of China. They are most closely related to Burmese and its relat ...

) contrasts modals and stiff voice in its vowels. This is not

register 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), th ...

: for each of the six Mpi tones, a word may have either a modal or stiff-voiced vowel. For example, low tone contrasts 'blood' and 'seven'.

References

Phonation {{ling-stub