Echolocating bats emit a highly directional sonar sound beam in the field
- A. Surlykke, S. Boel Pedersen, Lasse Jakobsen
- PhysicsProceedings of the Royal Society B: Biological…
- 2 December 2008
Directionality of echolocation calls of the trawling Daubenton's bat, Myotis daubentonii, flying over a pond in its natural habitat was measured and the relationship between frequency and directionality can be explained by the simple piston model.
Song recognition and song pattern in a shorthorned grasshopper
The choices made by femal grasshoppers showed that the chirp rate is the major parameter and the impulse rate the minor parameter in determining the acceptance of a song.