This DATA_README.txt file was generated on 2022-04-27 by Franz Goller

GENERAL INFORMATION

1. Title of Dataset: Comparative data sets with measurements of tonality and frequency range in passerines and hummingbirds

2. Author Information
	Corresponding Investigator 
		Name: Franz Goller
		Institution: SUniv. of Utah
		Email: f.goller@utah.edu
	Co-investigator 1
		Name: Marius FAiß
		Institution: Univ. of Leiden

	Co-investigator 2
		Name: Tobias Riede
		Institution: Midwestern University

	

DATA & FILE OVERVIEW

The data files show the means for individuals of all species and are presented in separate files for passerines and hummingbirds

Description of measurements and abbreviations in Excel tables:
deltadB, avg ddB etc., mean of measurements of amplitude of fundamental frequency minus amplitude of second harmonic for one individual in dB
AvgFreq...mean frequency of all measurement for an individual
FreqRange...frequency range of all measurements for an individual (max minus min frequency)
Group... vocal learner or non-learner designation
Stabw... standard deviation of dB-differences to assess constancy of tonality across frequency range
CV... coefficient of variation of dB-differences to normalize constancy of tonality across frequency range