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 Jan 13;11:916. doi: 10.1038/s41598-020-79641-z

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 licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence 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 licence, visit http://creativecommons.org/licenses/by/4.0/.

PMC Copyright notice

(A) Description of human psychophysical testing. Subjects were stationed at the same computers which controlled the bird operant tasks, outfitted with Sennheiser HD280PRO headphones, and given a response panel with two keys. Subjects were told they would be listening to a repeating background sound, during which they should press the observation key to cause a change in the background and to press the report key whenever they heard a change. (B) Performance (PC*, mean ± SEM, N = 3) on discriminating the different renditions of vowels from a single human speaker. (C) Performance (PC*, mean ± SEM, N = 3) on discriminating the different renditions of zebra finch song.