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

. 2018 Nov 20;22(1):71–79. doi: 10.1007/s10071-018-1222-y

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

© The Author(s) 2018

Open AccessThis article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided 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.

PMC Copyright notice

Fig. 1 — The waveform of a coo call from an adult male R. roxellana (a); Spectrogram (Gaussian window shape, view range = 0 − 12000 Hz, window length = 0.03 s, dynamic range = 70 dB, time step = 0.002 s, frequency step = 20 Hz) and LPC spectrum (Cepstral smoothing: 1200 Hz) of the coo call showing f₀ and formants (F₁–F₄) (b)