TITLE

Quantitative and Graphic Acoustic Analysis of Phonatory Modulations: The Modulogram

AUTHOR(S)
Buder, Eugene H.; Strand, Edythe A.
PUB. DATE
April 2003
SOURCE
Journal of Speech, Language & Hearing Research;Apr2003, Vol. 46 Issue 2, p475
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
A method is presented for analyzing phonatory instabilities that occur as modulations of fundamental frequency (f[sub0] ) and sound pressure level (SPL) on the order of 0.2 to 20 cycles per second. Such long-term phonatory instabilities, including but not limited to traditional notions of tremor, are distinct from cycle-to-cycle perturbation such as jitter or shimmer. For each of the 2 parameters (f[sub0] , in Hz, and SPL, in dB), 3 frequency domains are proposed: (a) flutter (10u20 Hz), (b) tremor (2u10 Hz), and (c) wow (0.2u2.0 Hz), yielding 6 types of instability. Analyses were implemented using fast Fourier transforms (FFTs) with domain-specific analysis parameters. Outputs include a graphic display in the form of a set of low-frequency spectrograms (the "modulogram") and quantitative measures of the frequencies, magnitudes, durations, and sinusoidal form of the instabilities. An index of a given instability is developed by combining its duration and average modulation magnitude into a single quantity. Performance of the algorithms was assessed by analyzing test signals with known degrees of modulation, and a range of applications was reviewed to provide a rationale for use of modulograms in phonatory assessment.
ACCESSION #
9467352

 

Related Articles

  • Multiple orofacial indices in amyotrophic lateral sclerosis. DePaul, Roxanne; Brooks, Benjamin R. // Journal of Speech & Hearing Research;Dec93, Vol. 36 Issue 6, p1158 

    Addresses whether multiple measures might enhance understanding of speech dysfunction in amyotrophic lateral sclerosis (ALS). Static isometric maximum voluntary contraction (MVC); Peak rate of change of force (PRCF); Upper motor neuron (UMN) index; Functional disability score (FDS); Subject...

  • Intelligibility and the acoustic characteristics of speech in amyotrophic lateral sclerosis (ALS).  // Journal of Speech & Hearing Research;Jun94, Vol. 37 Issue 3, p496 

    Analyzes the changes in specific speech parameters in 14 patients with amyotrophic lateral sclerosis (ALS) over a six-month period. Results showing the need for frequent evaluation of dysarthric ALS patients to better understand the relationship between intelligibility and the acoustic...

  • Characteristics of speaking rate in the dysarthria associated with amyotrophic lateral sclerosis. Turner, Greg S.; Weismer, Gary // Journal of Speech & Hearing Research;Dec93, Vol. 36 Issue 6, p1134 

    Presents a study on the ability to alter speaking rate in a group of 9 subjects with amyotrophic lateral sclerosis (ALS) and 9 age- and gender-matched, neurologically intact controls. Articulation rate; Pause duration; Importance to rate manipulation therapies and models of speaking rate in...

  • Physiologic deficits in the orofacial system underlying dysarthria in amyotrophic lateral sclerosis. Langmore, Susan E.; Lehman, Mark E. // Journal of Speech & Hearing Research;Feb94, Vol. 37 Issue 1, p28 

    Presents a study on the physiologic deficits in the orofacial system underlying dysarthria in amyotrophic lateral sclerosis. Contraction measurements; Muscle force characteristics of orofacial structures; Perceptual and physiologic tasks; Interaction between loss of strength and loss of speed in...

  • Acoustic Differences Between Content and Function Words in Amyotrophic Lateral Sclerosis. Turner, Greg S.; Tjaden, Kris // Journal of Speech, Language & Hearing Research;Jun2000, Vol. 43 Issue 3, p769 

    Studies describing acoustic characteristics of speech produced by individuals with dysarthria may help to explain intelligibility deficits for these speakers. One goal of the current study was to investigate the manner and extent to which nine speakers with mild to moderate dysarthria associated...

  • Progressive dysarthria: definition and clinical follow-up. Soliveri, P.; Piacentini, S.; Carella, F.; Testa, D.; Ciano, C.; Girotti, F. // Neurological Sciences;Oct2003, Vol. 24 Issue 3, p211 

    Progressive dysarthria is a common sign of several degenerative disorders of the central nervous system; it may also be a distinct nosographic entity. We identified nine patients in which progressive dysarthria remained the sole neurological sign for at least 2 years after onset. At least a year...

  • Carcinoma of the tongue and bulbar-onset amyotrophic lateral sclerosis: unusual differential diagnosis. Volanti, P.; Mannino, M.; Piccoli, T.; La Bella, V. // Neurological Sciences;Jun2007, Vol. 28 Issue 3, p151 

    We present a 72-year-old woman with progressive dysphagia, dysarthria and tongue palsy who was initially diagnosed with bulbar-onset amyotrophic lateral sclerosis (ALS). However, the absence of atrophy or fasciculations in the tongue, as in other voluntary muscles, and the lack of reproducible...

  • A novel exon 2 I27V VCP variant is associated with dissimilar clinical syndromes. Rohrer, Jonathan D.; Warren, Jason D.; Reiman, David; Uphill, James; Beck, Jonathan; Collinge, John; Rossor, Martin N.; Isaacs, Adrian M.; Mead, Simon // Journal of Neurology;Aug2011, Vol. 258 Issue 8, p1494 

    Mutations in valosin-containing protein (VCP) are associated with a syndromic constellation of inclusion body myositis, Paget's disease of bone and frontotemporal dementia. Here we describe the case reports of two patients with a novel variation (p.I27V) in the VCP gene that was not identified...

  • Amyotrophic lateral sclerosis. Wijesekera, Lokesh C.; Leigh, P. Nigel // Orphanet Journal of Rare Diseases;2009, Vol. 4, p1 

    Amyotrophic lateral sclerosis (ALS) is a neurodegenerative disease characterised by progressive muscular paralysis reflecting degeneration of motor neurones in the primary motor cortex, corticospinal tracts, brainstem and spinal cord. Incidence (average 1.89 per 100,000/year) and prevalence...

Share

Read the Article

Courtesy of VIRGINIA BEACH PUBLIC LIBRARY AND SYSTEM

Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics