Figure 5.

Effect of weather conditions on speed of sound in air. Speed of sound increases with temperature (a) and relative humidity (b), with a stronger effect of temperature than humidity. (c) Distribution of temperature (T) and relative humidity during bat foraging times in four countries with different climate, leading to different distributions in speed of sound (c) and relative deviation from median speed of sound (Δc). Boxplots show median, quartiles and whiskers at up to 1.5× the interquartile range beyond the quartiles