. Echoes of bats and men. Sound-waves; Echolocation (Physiology); Orientation. TRIGGER IMBEDDED IN RUBBER TO ALLOW DENTED STRIP OF STEEL TO BE BENT-. ^ Fig. 7. A very satisfactory device for echo experiments can be made like this. The inside of the horn should be a paraboloid of revolution, and the clicker must be mounted at the focal point of the parabola. The Fiber- glas and plastic boat- or car-patching materials laid on a plaster of Paris form make excellent horns, and so do the parabolic reflectors of certain desk lamps. 68. Please note that these images are extracted from scanned page im
. Echoes of bats and men. Sound-waves; Echolocation (Physiology); Orientation. TRIGGER IMBEDDED IN RUBBER TO ALLOW DENTED STRIP OF STEEL TO BE BENT-. ^ Fig. 7. A very satisfactory device for echo experiments can be made like this. The inside of the horn should be a paraboloid of revolution, and the clicker must be mounted at the focal point of the parabola. The Fiber- glas and plastic boat- or car-patching materials laid on a plaster of Paris form make excellent horns, and so do the parabolic reflectors of certain desk lamps. 68. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Griffin, Donald R. (Donald Redfield), 1915-. Garden City, N. Y. : Anchor Books
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Keywords: ., bookcentury1900, bookcollectionbiodivers, booksubjectorientation
