Current Search:  acoustic analysis (x)

View All Items

  • CSV Spreadsheet
(1 - 3 of 3)
COMPARISON OF ACOUSTIC MEASURES IN DISCRIMINATING BETWEEN THOSE WITH FRIEDREICH'S ATAXIA AND NEUROLOGICALLY NORMAL PEERS.
Title
COMPARISON OF ACOUSTIC MEASURES IN DISCRIMINATING BETWEEN THOSE WITH FRIEDREICH'S ATAXIA AND NEUROLOGICALLY NORMAL PEERS.
Creator
Luna-Webb, Sophia, Carson, Cecyle, University of Central Florida
Abstract / Description
Background: Technological advancements in speech acoustic analysis have led to the development of spectral/cepstral analyses due to questions regarding the validity of traditional time-based measures (i.e., Jitter, Shimmer, and Harmonics-to-Noise-Ratio) in objectifying perturbations in dysphonic voices. Aim: This study investigated the validity of time-based measures in discriminating those with Friedreich's ataxia (FA) from normal voiced (NV) peers when compared to cepstral-spectral measures...
Show moreBackground: Technological advancements in speech acoustic analysis have led to the development of spectral/cepstral analyses due to questions regarding the validity of traditional time-based measures (i.e., Jitter, Shimmer, and Harmonics-to-Noise-Ratio) in objectifying perturbations in dysphonic voices. Aim: This study investigated the validity of time-based measures in discriminating those with Friedreich's ataxia (FA) from normal voiced (NV) peers when compared to cepstral-spectral measures. Method: A total of 120 sustained vowel phonations from an existing database of 40 participants (20 FA; 20 NV) of the vowels /Q/, /i/, and /o/ were analyzed to determine which set of variables (i.e., time-based vs. cepstral-spectral) better predicted group membership. Four variables of time-based measures (Jitter Local %, Jitter RAP, Shimmer Local %, Shimmer APQ11, and HNR) were analyzed via the freeware program PRAAT and compared to four cepstral-spectral measures (Cepstral Peak Prominence, Cepstral Peak Prominence Standard Deviation, Low/High Ratio Standard Deviation, and the Cepstral/ Spectral Index of Dysphonia) extracted from the Analysis of Dysphonia in Speech and Voice (ADSV) software program. Results: Findings from a discriminant analysis showed sensitivity and specificity results to be better for ADSV measures; 100% of those in the FA group were classified correctly (sensitivity), and 95% of members in the NV group were correctly identified (specificity) as compared to PRAAT (70% sensitivity and 85% specificity). Conclusions: Cepstral-spectral measures are much more accurate in discriminating between those with FA and NV peers as compared to time-based estimates.
Show less
Date Issued
2015
Identifier
CFH0004824, ucf:45463
Format
Document (PDF)
PURL
http://purl.flvc.org/ucf/fd/CFH0004824
Business in the Estuary, Party in the Sea: Migration Patterns of Striped Mullet (Mugil cephalus) Within the Indian River Lagoon Complex
Title
Business in the Estuary, Party in the Sea: Migration Patterns of Striped Mullet (Mugil cephalus) Within the Indian River Lagoon Complex.
Creator
Myers, Olivia, Cook, Geoffrey, Mansfield, Kate, Reyier, Eric, University of Central Florida
Abstract / Description
Commercial and recreational environmental enterprises in the Indian River Lagoon (IRL), Florida supply nearly 10,000 jobs and produce $1.6 billion dollars a year in revenue. These waters contain iconic species of sportfish, including red drum, snook, and sea trout, as well as their lower trophic level prey such as snapper and mullet. Striped mullet (Mugil cephalus) are both commercially valuable as well as an indicator species for overall ecosystem health. From September to December, mullet...
Show moreCommercial and recreational environmental enterprises in the Indian River Lagoon (IRL), Florida supply nearly 10,000 jobs and produce $1.6 billion dollars a year in revenue. These waters contain iconic species of sportfish, including red drum, snook, and sea trout, as well as their lower trophic level prey such as snapper and mullet. Striped mullet (Mugil cephalus) are both commercially valuable as well as an indicator species for overall ecosystem health. From September to December, mullet in the IRL undergo an annual migration from their inshore foraging habitats to oceanic spawning sites. However, their actual migratory pathways remain unknown. To address this knowledge gap, I utilized passive acoustic telemetry to assess the migration patterns of M. cephalus within the IRL complex, particularly focusing on movement pathways from inshore aggregation sites to oceanic inlets to spawn. Coupling environmental metrics with movement data, I evaluated catalysts for migration as well as travel routes through the estuary. Network analyses identified potential conservation areas of interest and sites needing management intervention. Impoundments around the Merritt Island National Wildlife Refuge appear to serve as an important refuge area for striped mullet while the Banana and Indian Rivers act as corridors during their inshore migratory movements. The environmental metrics of depth, temperature, dissolved oxygen, pH, barometric pressure, and photoperiod were the best predictors for the number of detections and residency time produced by two case studies of striped mullet activity. An emphasis on spatial fisheries management along with vigilant environmental monitoring will ensure the status of this species, to the benefit of both natural and human systems in the Indian River Lagoon. The knowledge generated as a result of this project may also provide a framework for sustainably managing other migratory baitfish.
Show less
Date Issued
2019
Identifier
CFE0007895, ucf:52768
Format
Document (PDF)
PURL
http://purl.flvc.org/ucf/fd/CFE0007895
Acoustic Analysis of Prolonged Vowels In Adolescents and Young Adults With Friedreich's Ataxia
Title
Acoustic Analysis of Prolonged Vowels In Adolescents and Young Adults With Friedreich's Ataxia.
Creator
Hardin, Kaylea, Ryalls, John, Carson, Cecyle, Hoffman Ruddy, Bari, University of Central Florida
Abstract / Description
This study employed spectral analyses for acoustic measures of sustained vowel productions from a group of 20 adolescents and young adults with Friedreich's Ataxia (FA) and compared findings with a group of 20 age-equivalent and gender-matched normal control participants. State-of-the art spectral analyses from the Analysis of Dysphonia in Speech and Voice (ADSV) program, developed for various voice disorders from Kay Elemetrics, were applied to initial 2 second sustained vowel segments of...
Show moreThis study employed spectral analyses for acoustic measures of sustained vowel productions from a group of 20 adolescents and young adults with Friedreich's Ataxia (FA) and compared findings with a group of 20 age-equivalent and gender-matched normal control participants. State-of-the art spectral analyses from the Analysis of Dysphonia in Speech and Voice (ADSV) program, developed for various voice disorders from Kay Elemetrics, were applied to initial 2 second sustained vowel segments of the vowels /a/, /i/, and /o/. Spectral analyses included averages and standard deviations of Cepstral Peak Prominence (CPP), Cepstral Peak Prominence Standard Deviation (CPP SD), Low/High Spectral Ratio (L/H Ratio), Low/High Spectral Ratio Standard Deviation (L/H Ratio SD), Cepstral/Spectral Index of Dysphonia (CSID), and Mean Cepstral Peak Prominence Fundamental Frequency (Mean CPP F0). Statistical analyses revealed significant differences between the spectral analyses of voice characteristics of individuals with FA and those of normal controls for all measures except for CPP SD. The aim of these analyses was to determine spectral differences evident in vowel productions of individuals with FA using new cepstral-derived measures that characterize the phonatory instability and dis-coordination present in this disorder. Such research may not only help develop early non-invasive indicators of ataxia and track disease progression, but also serve to stimulate research into alleviating the symptoms of this devastating disease.
Show less
Date Issued
2014
Identifier
CFE0005181, ucf:50673
Format
Document (PDF)
PURL
http://purl.flvc.org/ucf/fd/CFE0005181