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Table 2.

The constant term (rms and peak SPL) of the logarithmic function describing the intensity compensation between 0 and 0.70 m from the target as three target types are approached by the bat

rms SPLPeak SPL
IndividualSmall sphereBig sphereMealwormSmall sphereBig sphereMealworm
104.5 100.4 102.9 108.1 104.0 106.6 
106.8 102.5 104.1 111.8 107.3 108.6 
103.1 99.8 102.5 106.3 102.9 105.6 
103.9 103.7 102.2 109.6 108.9 105.8 
Mean 104.6 101.6 102.9 109.0 105.8 106.7 
rms SPLPeak SPL
IndividualSmall sphereBig sphereMealwormSmall sphereBig sphereMealworm
104.5 100.4 102.9 108.1 104.0 106.6 
106.8 102.5 104.1 111.8 107.3 108.6 
103.1 99.8 102.5 106.3 102.9 105.6 
103.9 103.7 102.2 109.6 108.9 105.8 
Mean 104.6 101.6 102.9 109.0 105.8 106.7 

SPL, sound pressure level; rms, root mean square.

Note that the absolute pressure emitted by the bat depends very little(maximum difference 4 dB), if at all, on the target that was intercepted.

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