Although the night sky must contain an overabundance of ultrasonic bat calls, there is no confusion, for each of these unique mammals is equipped with a highly sophisticated system for detecting its own echoes.
Olgugi et õhtutaevas on kindlasti nahkhiirte ultrahelihäälitsustest paks, ei teki mitte mingit segadust, sest kõik need unikaalsed imetajad on varustatud ülikeeruka mehhanismiga omaenda kaja kinnipüüdmiseks.