| Title: | Visible Vowels: Visualization of Vowel Variation |
|---|---|
| Description: | Visualizes vowel variation in f0, F1, F2, F3 and duration. |
| Authors: | Wilbert Heeringa [aut, cre], Hans Van de Velde [aut] |
| Maintainer: | Wilbert Heeringa <[email protected]> |
| License: | GNU General Public License (>= 2) |
| Version: | 1.3.11 |
| Built: | 2024-11-01 11:30:29 UTC |
| Source: | https://github.com/cran/visvow |
Normalize duration of vowels.
normalizeDuration(vowelTab, replyNormal)normalizeDuration(vowelTab, replyNormal)
vowelTab |
A data frame containing acoustic vowel measurements; the format is described at https://www.visiblevowels.org/#help . |
replyNormal |
Choose from: "none", "Lobanov". |
Scale and/or normalize formants F1, F2 and F3.
normalizeFormants(vowelTab, replyScale, replyNormal, replyTimesN)normalizeFormants(vowelTab, replyScale, replyNormal, replyTimesN)
vowelTab |
A data frame containing acoustic vowel measurements; the format is described at https://www.visiblevowels.org/#help . |
replyScale |
Choose from: "Hz", "bark I", "bark II", "bark III", "ERB I", "ERB II", "ERB III", "ln", "mel I", "mel II", "ST". |
replyNormal |
Choose from: "none", "Peterson", "Sussman", "Syrdal & Gopal", "Miller", "Thomas & Kendall", "Gerstman", "Lobanov", "Watt & Fabricius", "Fabricius et al.", "Bigham", "Heeringa & Van de Velde I", "Heeringa & Van de Velde II", "Nearey I", "Nearey II", "Barreda & Nearey I", "Barreda & Nearey II", "Labov log-mean I", "Labov log-geomean I", "Labov log-mean II", "Labov log-geomean II", "Johnson". |
replyTimesN |
If measurements are provided for multiple time points per vowel, provide the indices of the time points that should be included when descriptives such as minimum, maximum, mean and standard deviation are calculated by some normalization methods; when there is just one time point, give index 1; a set of multiple indices are given as a vector, for example, when there are three indices and you want the first and third index be used, give c(1,3). |
Visible Vowels is an app that visualizes vowel variation in f0, F1, F2, F3 and duration.
A vowel is a speech sound produced without audible impediment to the airflow in the mouth and/or throat. Each vowel has a particular pitch (except when whispered), quality (timbre) and duration. f0 is the fundamental frequency of the periodic waveform and determines the perceived pitch. The quality is determined by the formants. Formants are resonance frequencies that define the spectral shape of vowels (and vowel-like sounds). The formant with the lowest frequency is called F1, the second-lowest F2, and the third F3. F1 is correlated with tongue height. The closer the tongue approaches the palate, the lower F1. F2 correlates with tongue retraction and lip protrusion. The more the tongue is positioned towards the front of the mouth, and the wider the lips are spread, the higher F2. F3 correlates with the tongue-blade position. The closer the blade is to the lips, the higher is F3. The acoustic vowel duration primarily corresponds with the perceived duration of a vowel sound. See Johnson (2012).
visvow()visvow()
visvow() opens Visible Vowels in your default web browser.
Johnson K (2012). Acoustic and Auditory Phonetics, 3rd edition. Wiley-Blackwell, Chichester.
The Help tab in the app provides more information about the format of the input file. Details about scale conversion and speaker normalization procedures and some specific metrics are found in the vignette.