Cul-de-Sac Hypernasality Test with Pattern Recognition of LPC Indices

Haapanen, Marja‐Leena; Liu, Li; Hiltunen, Tapio; Leinonen, Lea; Karhunen, Juha

doi:10.1159/000266380

Cited by 7 publications

(5 citation statements)

References 3 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In the measurement of speech signals distances from the signal pattern Euclidean, weighted Euclidean, Hamming and weighted Hamming metrics were used. Differences in distances from the speech signal pattern identified in this way were a measure of deformation of human voice [6,7]. In this paper, the choice of metrics has been made taking into account that the most meaningful are those whose values show greater differences.…”

Section: Materials and Methodologymentioning

confidence: 99%

Reduction of Speech Signal Deformation in Patients after Nasal Septum Surgery (Septolplasty)

2011

View full text Add to dashboard Cite

Nasal blockage belongs to the most common symptoms of nasal diseases in vocal tract area. At the same frequency there appear acoustic symptoms, existing as the change of human voice color. Vocal and articulation disorders of the ear, nose ane throat are usually observed in the form of closed rhinolalia and this observation can be performed both by patients and other listeners as well. Nasal polyps and nasal septum deviation are frequent reason of nasal blockage connected in consequence with decreased nasal ventilation. One of the main principles of the surgical treatment performed in mentioned situations is the restoration of nasal patency. The evaluation of the influence of nasal surgery on intensification of acoustic symptoms depends on verification of parameters of the human speech signal, so it was necessary to apply objective methods. That allowed to combine results of acoustic analysis with patient's subjective feeling and rhinomanometric evaluation of nasal patency. The main purpose of this research was to objectively evaluate the influence of surgical treatment improving nasal patency on deformation of the voice of operated patients.

show abstract

Section: Materials and Methodologymentioning

confidence: 99%

Reduction of Speech Signal Deformation in Patients after Nasal Septum Surgery (Septolplasty)

2011

View full text Add to dashboard Cite

show abstract

“…The Nasometer is an instrument designed to measure the degree of nasality in speech. Recently, this instrument has received increasing acceptance [10][11][12][13][14][15]. The princi ple of the Nasometer consists in a comparison of the nasal and oral components of a subjects' speech.…”

Section: Instrumentationmentioning

confidence: 99%

Effect of Cochlear Implantation on Nasality in Post-Lingually Deafened Adults

Langereis¹,

Dejonckere²,

Olphen³

et al. 1997

Folia Phoniatr Logop

View full text Add to dashboard Cite

The present study addresses the effect of cochlear implantation on nasality in 21 post-lingually deafened Dutch subjects. All subjects received the Nucleus 22 implant (MSP version). Speech recordings were made pre-implantation and 3 and 12 months post-implantation with the implant switched on and off. Nasality measurements were performed on a standard text and on two sentences without nasal phonemes. The results show that post-lingual deafness in individuals can result in a deviant degree of nasality in speech production. However, the nasalance value of 86% of the subjects of our study fell within the normative range defined as the mean ± 2 standard deviations of the normal population. After implantation we found no statistically significant effect of implant use. However, individual nasality values outside the normative range may improve. Furthermore, 12 months post-implantation we found a significant decrease in the variability of the nasalance values obtained for two sentences without nasal phonemes.

show abstract

“…Some other studies confirm Gutzmann's [3] findings. Acoustic vocal tract area features, derived from vowels by predictive coding were exam ined with a self-organized feature map in nose open condition (NOpC) and NObC hvpernasal and normal speakers [5]. It was found that in hypemasal speakers the obstruction of the nose induced a significant change in the map location of the vowels [i] and [u].…”

Section: Introductionmentioning

confidence: 99%

Velopharyngeal Function in Association with Artificial Obstruction of the Nose: A Videonasendoscopic Study

Haapanen

Kalland²,

Isotalo³

et al. 1997

Folia Phoniatr Logop

View full text Add to dashboard Cite

Artificial obstruction of the nose can make the nasal cavity a cul-de-sac resonator, which has clearly audible consequences. The present study compares videonasendoscopic views of the velopharyngeal mechanism in test words uttered with the nose open and obstructed in 20 subjects with a Pierre Robin sequence and in 6 subjects without this sequence. A velopharyngeal flap was constructed on 12 subjects. Videonasendoscopic findings were assessed by 3 judges with acceptable agreement. The results indicated that impairment of velopharyngeal function occurred significantly more often in subjects with a velopharyngeal flap. This was attributed to aerodynamic reasons. Clinical implications of the results are discussed.

show abstract

Cul-de-Sac Hypernasality Test with Pattern Recognition of LPC Indices

Cited by 7 publications

References 3 publications

Reduction of Speech Signal Deformation in Patients after Nasal Septum Surgery (Septolplasty)

Reduction of Speech Signal Deformation in Patients after Nasal Septum Surgery (Septolplasty)

Effect of Cochlear Implantation on Nasality in Post-Lingually Deafened Adults

Velopharyngeal Function in Association with Artificial Obstruction of the Nose: A Videonasendoscopic Study

Contact Info

Product

Resources

About