ultrasound {assist}R Documentation

Ultrasound imaging of the tongue shape

Description

The 'ultrasound' data frame has 1,215 rows and 4 columns of data from an ultrasound experiment

Usage

data(ultrasound)

Details

A Russian speaker produced the consonant sequence, /gd/, in three different linguistic environments: '2words', 'cluster' and 'Schwa', with three replications for each environment. 15 points from each of 9 slices of toungue curves separated by 30 ms (milliseconds) are extracted. Therefore, in total there are 15*9*3*3=1,215 observations.

Format

The data frame contains the following columns:

height a numeric vector of toungue height in mm

length a numeric vector of toungue length in mm

time a numeric vector of time in ms

env a factor with three levels: 1 2 and 3 for environment '2words', 'cluster' and 'Schwa' respectively

Source

Phonetics-Phonology Lab of New York University.

references

Davidson, L. (2006). Comparing Tongue Shapes from Ultrasound Imaging Using Smoothing Spline Analysis of Variance. Journal of the Acoustical Society of America 120, 407-415.


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