Comparison of voice relative fundamental frequency estimates derived from an accelerometer signal and low-pass filtered and unprocessed microphone signals

Lien, Yu-An S.; Stepp, Cara E.

doi:10.1121/1.4870488

Cited by 14 publications

(12 citation statements)

References 39 publications

(82 reference statements)

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“…This result may be in part due to the fact that most patients in this study exhibited mild-to-moderate dysphonia, and therefore practically all the perturbation measures were valid. The high correlations exhibited by timing-based measures of instantaneous f0 and jitter, as well as CPP, bode well for the derivation of recently popular measures of vocal hyperfunction and dysphonia—relative fundamental frequency [11] and the cepstral/spectral index of dysphonia [42]—solely from subglottal neck-surface acceleration. Based on the encouraging result with CPP, future work calls for further investigation into vocal function assessment during continuous speech segments and on a larger sample of subjects with severely dysphonic characteristics.…”

Section: Discussionmentioning

confidence: 91%

“…In terms of voice source characterization, anterior neck-surface acceleration at the tracheal level has been studied in speakers with both normal and disordered voices to derive features related to average fundamental frequency (f0) [9], [10], instantaneous f0 [11], sound pressure level [12], voice activity detection [13], and glottal airflow features [14]. Robust estimation of vocal f0 has been the primary motivation for employing neck-placed ACCs, particularly in noisy environments [9], [10] and in breathy speech contexts when electroglottography fails to register a signal due to reduced vocal fold contact [15].…”

Section: Introductionmentioning

confidence: 99%

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Relationships Between Vocal Function Measures Derived from an Acoustic Microphone and a Subglottal Neck-Surface Accelerometer

Mehta

Stan

Hillman

2016

IEEE/ACM Trans. Audio Speech Lang. Process.

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Monitoring subglottal neck-surface acceleration has received renewed attention due to the ability of low-profile accelerometers to confidentially and noninvasively track properties related to normal and disordered voice characteristics and behavior. This study investigated the ability of subglottal neck-surface acceleration to yield vocal function measures traditionally derived from the acoustic voice signal and help guide the development of clinically functional accelerometer-based measures from a physiological perspective. Results are reported for 82 adult speakers with voice disorders and 52 adult speakers with normal voices who produced the sustained vowels /a/, /i/, and /u/ at a comfortable pitch and loudness during the simultaneous recording of radiated acoustic pressure and subglottal neck-surface acceleration. As expected, timing-related measures of jitter exhibited the strongest correlation between acoustic and neck-surface acceleration waveforms (r ≤ 0.99), whereas amplitude-based measures of shimmer correlated less strongly (r ≤ 0.74). Additionally, weaker correlations were exhibited by spectral measures of harmonics-to-noise ratio (r ≤ 0.69) and tilt (r ≤ 0.57), whereas the cepstral peak prominence correlated more strongly (r ≤ 0.90). These empirical relationships provide evidence to support the use of accelerometers as effective complements to acoustic recordings in the assessment and monitoring of vocal function in the laboratory, clinic, and during an individual’s daily activities.

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Section: Discussionmentioning

confidence: 91%

Section: Introductionmentioning

confidence: 99%

Relationships Between Vocal Function Measures Derived from an Acoustic Microphone and a Subglottal Neck-Surface Accelerometer

Mehta

Stan

Hillman

2016

IEEE/ACM Trans. Audio Speech Lang. Process.

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“…Across the nine acoustical measures, only data points from RFF offset cycle 10 and onset cycle 1 were missing from the data set (when less than two values were available for averaging). Missing RFF values may be due to instances of excessive glottalization or when there are fewer than ten vocal cycles in the vowel segment (Lien and Stepp, 2014). The missing data points accounted for 12% of the possible RFF values and were evenly distributed between offset and onset values, with 26 and 27 missing values, respectively.…”

Section: Resultsmentioning

confidence: 99%

The relationship between acoustical and perceptual measures of vocal effort

McKenna

Stepp

2018

The Journal of the Acoustical Society of America

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Excessive vocal effort is a common clinical voice symptom, yet the acoustical manifestation of vocal effort and how that is perceived by speakers and listeners has not been fully elucidated. Here, 26 vocally healthy adults increased vocal effort during the production of the utterance /ifi/, followed by self-ratings of effort on a 100 mm visual analog scale. Twenty inexperienced listeners assessed the speakers' vocal effort using the visual sort-and-rate method. Previously proposed acoustical correlates of vocal effort were calculated, including: mean sound pressure level (SPL), mean fundamental frequency (f o), relative fundamental frequency (RFF) offset cycle 10 and onset cycle 1, harmonics-to-noise ratio (HNR), cepstral peak prominence and its standard deviation (SD), and low-to-high (L/H) spectral ratio and its SD. Two separate mixed-effects regression models yielded mean SPL, L/H ratio, and HNR as significant predictors of both speaker and listener ratings of vocal effort. RFF offset cycle 10 and mean f o were significant predictors of listener ratings only. Therefore, speakers and listeners attended to similar acoustical cues when making judgments of vocal effort, but listeners also used additional time-based information. Further work is needed to determine how vocal effort manifests in the speech signal in speakers with voice disorders.

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“…42,43 ). RFF has been shown to be calculated accurately from a neck placed accelerometer 44 and the use of ambulatory monitoring could provide a non-invasive method of documenting vocal loads from both groups of individuals, potentially providing further insight into the relationship between voice use and changes in onset cycle 1 RFF.…”

Section: Discussionmentioning

confidence: 99%

Effects of Adventitious Acute Vocal Trauma: Relative Fundamental Frequency and Listener Perception

et al. 2016

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Objective High voice users (individuals who demonstrate excessive or loud vocal use) are at risk for developing voice disorders. The objective of this study was to examine, both acoustically and perceptually, vocal changes in healthy speakers following an acute period of high voice use. Methods Members of a university women’s volleyball team (N=12) were recorded a week prior (Pre) and week following (Post) the 10-week spring season; N=6 control speakers were recorded over the same time period for comparison. Speakers read four sentences, which were analyzed for relative fundamental frequency (RFF). Eight naïve listeners participated in an auditory-perceptual visual sort and rate (VSR) task, in which they rated each voice sample’s overall severity and strain. Results No significant differences were found as a function of time point in the VSR ratings for the volleyball group. Onset cycle 1 RFF values were significantly lower (p = 0.04) in the Post recordings of the volleyball participants compared to Pre recordings, but there was no significant difference (p = 0.20) in offset cycle 10 RFF values. Receiver operating characteristic analyses indicated moderate sensitivity and specificity of onset cycle 1 RFF for discrimination between the volleyball and control participants. Changes were not apparent in the control group as a function of time for either, onset cycle 1 RFF, offset cycle 10 FF, or either vocal attribute. Conclusion Onset cycle 1 RFF may be an effective marker for detecting vocal changes over an acute high voice use period of time before perceptual changes are noted.

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Comparison of voice relative fundamental frequency estimates derived from an accelerometer signal and low-pass filtered and unprocessed microphone signals

Cited by 14 publications

References 39 publications

Relationships Between Vocal Function Measures Derived from an Acoustic Microphone and a Subglottal Neck-Surface Accelerometer

Relationships Between Vocal Function Measures Derived from an Acoustic Microphone and a Subglottal Neck-Surface Accelerometer

The relationship between acoustical and perceptual measures of vocal effort

Effects of Adventitious Acute Vocal Trauma: Relative Fundamental Frequency and Listener Perception

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