soundgen (version 1.1.0)

estimateVTL: Estimate vocal tract length

Description

Estimates the length of vocal tract based on formant frequencies, assuming that the vocal tract can be modeled as a tube open as both ends.

Usage

estimateVTL(formants, speedSound = 35400, checkFormat = TRUE)

Arguments

formants

either a character string like "aaui" referring to default presets for speaker "M1" or a list of formant times, frequencies, amplitudes, and bandwidths. formants = NA defaults to schwa. Time stamps for formants and mouthOpening can be specified in ms or an any other arbitrary scale.

speedSound

speed of sound in warm air, cm/s. Stevens (2000) "Acoustic phonetics", p. 138

checkFormat

if TRUE, expands shorthand format specifications into the canonical form of a list with four components: time, frequency, amplitude and bandwidth for each format (as returned by the internal function reformatFormants)

Value

Returns the estimated vocal tract length in cm.

Examples

# NOT RUN {
estimateVTL(NA)
estimateVTL(500)
estimateVTL(c(600, 1850, 3100))
estimateVTL(formants = list(f1 = 600, f2 = 1650, f3 = 2400))

# for moving formants, frequencies are averaged over time,
# i.e. this is identical to the previous example
estimateVTL(formants = list(f1 = c(500, 700), f2 = 1650, f3 = c(2200, 2600)))
# }