THE STUDY OF THE MECHANISM OF TRANSFORMATION OF PHYSICAL ENERGY INTO NERVE ACTIVITY IN THE INTERNAL EAR.
Abstract
Study of the structure of the cochlea of a number of small mammals revealed, in certain species of bats and of rodents, a number of variations which appear to be related to the somewhat un usual sound frequencies which they are able to detect, and which are not found in the ears of the majority of mammals. Serial sections of larynxes of many species of bats have shown notable modifications - massive intrinsic and extrinsic musculature, large arytenoid cartilages and very slender vocal cords - concerned with production of very high frequency sounds. Further work was done on various aspects of beat-note hypothesis in echolocation. Sonograph analysis of tape recordings of call signals of bats and other animals w0ade and studied. Suggestion that cavities of skull act as resonant filters was confirmed by constructing models and obtaining identical responses. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Feb 01, 1963
- Accession Number
- AD0413764
Entities
People
- F.c. Ormerod
Organizations
- University of London