getFormantDispersion | R Documentation |
Internal soundgen function.
getFormantDispersion(
formants,
method = c("meanDispersion", "regression")[2],
tube = c("closed-open", "open-open")[1],
interceptZero = TRUE,
speedSound = 35400,
plot = FALSE,
checkFormat = TRUE,
output = c("simple", "detailed")[1]
)
formants |
formant frequencies in any format recognized by
|
method |
the method of estimating vocal tract length (see details) |
tube |
the vocal tract is assumed to be a cylindrical tube that is either "closed-open" or "open-open" (same as closed-closed) |
interceptZero |
if TRUE, forces the regression curve to pass through the origin. This reduces the influence of highly variable lower formants, but we have to commit to a particular model of the vocal tract: closed-open or open-open/closed-closed (method = "regression" only) |
speedSound |
speed of sound in warm air, by default 35400 cm/s. Stevens (2000) "Acoustic phonetics", p. 138 |
plot |
if TRUE, plots the regression line whose slope gives formant dispersion (method = "regression" only). Label sizes show the influence of each formant, and the blue line corresponds to each formant being an integer multiple of F1 (as when harmonics are misidentified as formants); the second plot shows how VTL varies depending on the number of formants used |
checkFormat |
if FALSE, only a list of properly formatted formant frequencies is accepted |
output |
"simple" (default) = just the VTL; "detailed" = a list of additional stats (see Value below) |
Estimates formant dispersion based on one or more formant frequencies.
soundgen:::getFormantDispersion(
list(f1 = c(570, 750), f2 = NA, f3 = c(2400, 2200, NA)))
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