Figure - PMC

Skip to main content

An official website of the United States government

Here's how you know

Here's how you know

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.

View full-text article in PMC

. 2021 Sep 23;4:1055. doi: 10.1038/s42003-021-02578-0

Search in PMC
Search in PubMed
View in NLM Catalog
Add to search

© The Author(s) 2021

Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.

PMC Copyright notice

Fig. 4 — a Selected examples of synthesized audio waveforms produced during whispered speech trials. b Selected examples of synthesized audio waveforms produced during imagined speech trials. In both runs, the speech was reliably produced when the participant was prompted to whisper or imagine to speak, respectively. c Pearson correlation coefficients between time-warped reference speech trials and closed-loop whispered trials (n₁ = 73) and closed-loop imagined speech trials (n₁ = 75), respectively. Chance level (n₂ = 1000) is based on randomly selected data from non-speech tasks performed by the participant. Statistical significance, indicated by asterisks (***P < 0.001; **P < 0.01), was computed using Mann–Whitney U tests. Black horizontal lines correspond to median DTW correlations scores. Boxes define boundaries between the first and the third quartile. Error bars present the range of data within 1.5 times the interquartile range, and points beyond the range of the error bars show outliers. d The proportion of decoded and synthesized speech during whispered and imagined trials, respectively, versus non-speech intertrial intervals.