This paper addresses a question concerning phonological operations involved standard Farsi vowel Compensatory Lengthening (CL) due to glottal consonant deletion in syllabic coda. Specifically, I question two current views related to CL process. One view suggests that glottal allophonic weakening is compensated by vowel lengthening. Another view suggests that glottal consonant is deleted, but va...

The aquatic frog Xenopus laevis uses a complex vocal repertoire during mating and male-male interactions. Calls are produced without breathing, allowing the frogs to vocalize for long periods underwater. The Xenopus vocal organ, the larynx, is innervated by neurons in cranial motor nucleus (n.) IX-X, which contains both vocal (laryngeal) and respiratory (glottal) motor neurons. The primary desc...

BACKGROUND We have previously shown that nasal pressure support ventilation (nPSV) can lead to an active inspiratory laryngeal narrowing in lambs. This, in turn, can limit lung ventilation and divert air into the digestive system, with potentially deleterious consequences. On the other hand, nasal high-frequency oscillatory ventilation (nHFOV) is particularly attractive in newborns, especially ...

introduction: unilateral vocal cord paralysis (uvcp) is not an uncommon finding. several procedures are available to manage glottal insufficiency. we conducted a clinical trial to evaluate the outcome of fat injection laryngoplasty.   materials and methods: liposuctioned lower abdomen fat was injected for augmentation of paralyzed vocal cord in 20 patients with uvcp. autologous fat was harveste...

An iterative numerical algorithm is presented for camputing the true glottal flow given the glottal area function and lung pressure. The effectsofglottalinertance and suband supraglottal impedance are discussed. It is sham that the effect of glottal inertance is small and that it is adequate t o consider subglott a l and supraglottal systems by one-formant loads only. An equivalentcircuitfor th...

People who suffer from larynx cancer are often laryngectomized, losing, as a consequence, their ability to produce normal speech. Despite advances in alaryngeal speech rehabilitation and restoration, laryngectomee speech is of poorer quality and intelligilibility than natural speech. This project explores the use of voice conversion as an alternative method to the enhancement of the quality and...

We present a straightforward method for estimating the parameters of a physical mass-spring model of the vocal folds using a glottal flow signal. Initial experiments show that the method can successfully be used to model the glottal flow waveform. Parameters obtained can be used to characterise the underlying physical system in, for example, when used as features for speech recognition applicat...