What is voice shimmer?
The cycle-to-cycle variability of the period amplitude of vocal cord vibration. Shimmer is used as one of the measures for the micro-instability of vocal cord vibrations.
What does a low HNR mean?
Harmonicity is expressed in dB: if 99% of the energy of the signal is in the periodic part, and 1% is noise, the HNR is 10*log10(99/1) = 20 dB. A HNR of 0 dB means that there is equal energy in the harmonics and in the noise. Hoarse speakers will have an [a] with a harmonicity much lower than 20 dB.
What is jitter linguistics?
Excessive jitter makes a voice sound creaky (see creaky voice). Mean absolute jitter is the mean absolute difference between sequential vocal periods measured during a sustained phonations (in seconds or milliseconds).
What do jitter and shimmer mean?
Jitter and shimmer represent the variations that occur in the fundamental frequency. Whereas jitter indicates the variability or perturbation of fundamental frequency, shimmer refers to the same perturbation, but it is related to amplitude of sound wave, or intensity of vocal emission.
How is shimmer measured?
Shimmer (apq11) is expressed as the 11-point Amplitude Perturbation Quotient, the average absolute difference between the amplitude of a period and the average of the amplitudes of it and its ten closest neighbours, divided by the average amplitude.
What is diplo sickness?
Diplopia is the simultaneous perception of two images of a single object that may be displaced horizontally or vertically in relation to each other. Also called double vision, it is a loss of visual focus under regular conditions, and is often voluntary.
What is HNR speech?
HNR is a measure that quantifies the amount of additive noise in the voice signal; jitter reflects the periodicity of vocal fold vibration. In this study, measures of HNR, jitter and F0 were used to compare vocal function in three groups of normally speaking women: young adults, middle-aged adults, and elderly adults.
What do jitter and shimmer tell us?
Measurements of F0 disturbance jitter and shimmer, has proven to be useful in describing the vocal characteristics. Jitter is defined as the parameter of frequency variation from cycle to cycle, and shimmer relates to the amplitude variation of the sound wave, as Zwetsch et al.
What is jitter and ping?
Ping and jitter are measures of the speed at which you can request and receive data (ping) and the variation in that response time (jitter). In essence, they are measures of the quality of your connection and are used to diagnose performance of real-time applications like video streaming or voice over internet (VoIP).
How are jitter and Shimmer used in voice recognition?
Jitter and shimmer are acoustic characteristics of voice signals, and they are quantified as the cycle-to-cycle variations of fundamental frequency and waveform amplitude, respectively. Both features have been largely used to detect voice pathologies (see, e.g. [5, 6]).
What is the shimmer of a vocal cord?
Shimmer. The cycle-to-cycle variability of the period amplitude of vocal cord vibration. Shimmer is used as one of the measures for the micro-instability of vocal cord vibrations. Given that shimmer may vary dramatically with changes of voice production within the same voice, and also that a given shimmer measurement is non-specific…
What is Shimmer and what is it used for?
Shimmer. Shimmer is used as one of the measures for the micro-instability of vocal cord vibrations. Given that shimmer may vary dramatically with changes of voice production within the same voice, and also that a given shimmer measurement is non-specific to any particular voice disorder, this measure is considered superfluous to…
What are the measurements of jitter and Shimmer?
Jitter and shimmer are measures of the cycle-to-cycle variations of fundamental frequency and amplitude, respectively, which have been largely used for the description of pathological voice quality.
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