Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Vowel confusion matrix for the 15-channel, 30 dB/octave filter slope condition for younger children with normal hearing (NH), older children with NH, and adults with NH. Percent response for each cell is indicated via a color gradient, with black representing 100% responses and white representing 0% responses. Adjacent vowels have similar formant frequencies and vowels on opposite ends of the matrix have similar first formant frequencies.
