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.
This page is no longer being updated and the information may be out of date.
Audio Quality Research
Please click the tabs below to use and explore our audio quality work:
- Speech Intelligibility Demo — Listen to various speech samples, from different audio codecs, encumbered with background noise to gauge intelligibility.
- Modified Rhyme Test Audio Library — Access our library of MRT audio files to support your own research and development in the field of speech intelligibility.
Created October 12, 2016, Updated May 27, 2026