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Table 3 Mean and standard deviation of the acoustic parameters for Low and High arousal condition, results of the dependent t-test comparing both arousal-levels for each acoustic parameter and the correlation coefficient with the PC1; bold p-values represent significant difference; ↑ value is higher in the High than in the Low arousal condition, ↓ value is lower in the High than in the Low arousal condition; bold loading factors represent the parameters showing loading factors higher than 0.700 with the respective PC

From: Vocal correlates of sender-identity and arousal in the isolation calls of domestic kitten (Felis silvestris catus)

  LOW HIGH LOW versus HIGH
Parameters Mean SD Mean SD T p   PC1
Time-related parameters
Call duration [ms] 566.34 168.62 707.10 186.09 −2.81 .012 -.756
ICI [ms] 2072.53 1442.76 1075.38 652.32 2.58 .019 .482
Peak time [ms] 0.23 0.08 0.29 0.12 −1.92 .072   -.640
Source-related parameters
MeanF0 [Hz] 1305.42 238.49 1105.10 184.60 3.82 .001 .746
MinF0 [Hz] 931.71 274.86 746.65 166.58 3.12 .006 .785
MaxF0 [Hz] 1517.21 249.64 1316.52 221.48 3.68 .002 .686
SDF0 [Hz] 154.99 37.51 149.56 37.23 .50 .623   -.077
Filter-related parameters
Peak [Hz] 1648.68 327.77 2493.48 676.96 −5.24 <.001 -.610
MeanF1 [Hz] 2112.80 420.47 2642.38 325.62 −4.84 <.001 -.509
SDF1 [Hz] 696.02 273.16 549.43 159.78 2.13 .048 .107
BWF1 [Hz] 1120.22 466.85 623.80 376.95 3.60 .002 .442
MeanF2 [Hz] 7034.30 570.61 6758.39 511.89 1.79 .091   .095
SDF2 [Hz] 981.97 286.65 987.88 297.99 -.07 .948   -.247
BWF2 [Hz] 1977.26 512.96 1858.01 732.96 .75 .463   -.067
MeanF3 [Hz] 11320.63 552.86 11240.16 524.16 .47 .642   .118
SDF3 [Hz] 1134.20 249.39 1273.83 231.80 −1.52 .148   -.588
BWF3 [Hz] 2044.74 1128.99 3017.33 1602.68 −2.03 .058   -.410
F2-F1 [Hz] 4921.50 694.44 4116.01 745.54 4.31 <.001 .348
Consistency 0.89 0.02 0.86 0.03 3.03 .008 .312
Tonality-related parameters
Cepstral peak [V] 2.36 0.59 2.69 0.61 −1.69 .110   -.366
Voiced [%] 98.23 1.71 96.26 2.67 2.53 .022 .712
MaxHNR [db] 31.73 4.61 28.78 3.27 2.51 .022 .576