摘要:

A sonagraphic analysis of the vocalizations of bullfinchesPyrrhula pyrrhulais presented and their behavioural contexts and functions noted. The vocal repertoire of the bullfinch is compared to that of other finches with particular attention to repertoire size and sexual specificity; the repertoire of 14–17 vocal categories is comparatively greater than that of most carduelines and the majority of vocalizations were given by both sexes. The development of nestling, fledgling and some adult calls is described. Early vocal ontogeny in the bullfinch was similar to that previously described for the chaffinch. The earliest recorded calls of nestling bullfinches showed a single fundamental. The independent use of two sound sources became apparent on the second day after hatching and the major elements of the three best studied call types were all derived from the lower fundamental of the nestling begging call.

ISSN:0952-4622    

DOI:10.1080/09524622.1990.9753131

出版商:Taylor & Francis Group    

年代:1990

数据来源: Taylor

摘要:

A new sound trap for capturing male and female crickets attracted to the calling song of the male is described. Major advantages of the trap are its portability and effectiveness. It was designed to operate in conjunction with a previously described cricket-song generator. The trap is compared with other designs and the acoustic and migratory behaviour of crickets revealed by sound trapping are discussed.

ISSN:0952-4622    

DOI:10.1080/09524622.1990.9753132

出版商:Taylor & Francis Group    

年代:1990

数据来源: Taylor

摘要:

This paper focuses on sound production in the larvae ofGeotrupes spiniger(Marsham) (Coleoptera: Geotrupidae). A single stridulatory apparatus was identified and then analysed from a structural point of view. Sound was studied using spectography and results included a quantitative analysis with characterizing physical parameters. Results highlight the need to study stridulation in Geotrupidae more in detail, to improve our understanding of its evolutionary and biological meaning.

ISSN:0952-4622    

DOI:10.1080/09524622.1990.9753133

出版商:Taylor & Francis Group    

年代:1990

数据来源: Taylor

摘要:

Computers are available that can store, synthesize and replay sounds using digital technology. I describe the major components of audio computers, the principles of digital sound acquisition and playback, and information and caveats for scientists interested in acquiring an audio computer system for their own use. A tutorial on analog filter application is also included as well as a diagnostic procedure and a buyer's check list.

ISSN:0952-4622    

DOI:10.1080/09524622.1990.9753134

出版商:Taylor & Francis Group    

年代:1990

数据来源: Taylor

ISSN:0952-4622    

DOI:10.1080/09524622.1990.9753135

出版商:Taylor & Francis Group    

年代:1990

数据来源: Taylor

ISSN:0952-4622    

DOI:10.1080/09524622.1990.9753136

出版商:Taylor & Francis Group    

年代:1990

数据来源: Taylor

ISSN:0952-4622    

DOI:10.1080/09524622.1990.9753137

出版商:Taylor & Francis Group    

年代:1990

数据来源: Taylor

ISSN:0952-4622    

DOI:10.1080/09524622.1990.9753138

出版商:Taylor & Francis Group    

年代:1990

数据来源: Taylor

ISSN:0952-4622    

DOI:10.1080/09524622.1990.9753139

出版商:Taylor & Francis Group    

年代:1990

数据来源: Taylor

ISSN:0952-4622    

DOI:10.1080/09524622.1990.9753130

出版商:Taylor & Francis Group    

年代:1990

数据来源: Taylor