Table 2

Description of acoustic parameters used in the analysis

Parameter

Number

Parameter description


1

Duration of the entire call [s]: from the starting point of the first element till the ending point of the last element

2

Elements: amount of elements (inhalation and exhalation)

3

Elements per second [e/s]: amount of elements over the duration

4

Maximum frequency start [Hz]: maximum frequency of the starting points of the entire elements

5

Minimum frequency start [Hz]: maximum frequency of the entire starting points of elements

6

Maximum frequency end [Hz]: maximum frequency of the entire ending points of elements

7

Minimum frequency end [Hz]: minimum frequency of the entire ending points of elements

8

Mean frequency start [Hz]: arithmetic mean of the frequency of the entire starting points of elements

9

Mean frequency end [Hz]: arithmetic mean of the frequency of the entire ending points of elements

10

Exhalation elements: amount of exhalation elements

11

Inhalation elements: amount of inhalation elements

12-15

1st -, 2nd-, 3rd - and 4th - quarter elements per second [e/s]: amount of elements over the duration of respective quarters

16

Middle part elements per second [e/s]: amount of elements over the duration of the 2nd and 3rd quarter

17-20

1st -, 2nd-, 3rd - and 4th - quarter mean frequency start [Hz]: arithmetic mean of the frequency of the entire starting points of elements of respective quarters

21

Middle part mean frequency start [e/s]: arithmetic mean of the frequency of the entire starting points of elements of the 2nd and 3rd quarter

22-23

1st -, and 2nd - quarter mean frequency end [Hz]: arithmetic mean of the frequency of the entire ending points of elements of respective quarters


Meyer et al. BMC Evolutionary Biology 2012 12:16   doi:10.1186/1471-2148-12-16

Open Data