| Rainforests as concert halls for birds: are reverberations improving sound transmission of long song elements? | |
| | |
MedLine Citation:
|
PMID: 16454315 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
|
In forests reverberations have probably detrimental and beneficial effects on avian communication. They constrain signal discrimination by masking fast repetitive sounds and they improve signal detection by elongating sounds. This ambivalence of reflections for animal signals in forests is similar to the influence of reverberations on speech or music in indoor sound transmission. Since comparisons of sound fields of forests and concert halls have demonstrated that reflections can contribute in both environments a considerable part to the energy of a received sound, it is here assumed that reverberations enforce also birdsong in forests. Song elements have to be long enough to be superimposed by reflections and therefore longer signals should be louder than shorter ones. An analysis of the influence of signal length on pure tones and on song elements of two sympatric rainforest thrush species demonstrates that longer sounds are less attenuated. The results indicate that higher sound pressure level is caused by superimposing reflections. It is suggested that this beneficial effect of reverberations explains interspecific birdsong differences in element length. Transmission paths with stronger reverberations in relation to direct sound should favor the use of longer signals for better propagation. |
| | |
Authors:
|
Erwin Nemeth; Torben Dabelsteen; Simon Boel Pedersen; Hans Winkler |
Related Documents
:
|
3780955 - Adaptive optimal sound for vocal communication in tunnels of a subterranean mammal (spa... 19384705 - Time-frequency analysis of foetal heart sound signal for the prediction of prenatal ano... 23038525 - Performance of dimming control scheme in visible light communication system. 18532665 - The physics of pulse propagation in the nocturnal atmospheric boundary layer: measureme... 22941315 - Reference frames for coding touch location depend on the task. 11921035 - Future directions for the analysis of musculoskeletal design and locomotor performance. |
Publication Detail:
|
Type: Journal Article; Research Support, Non-U.S. Gov't |
Journal Detail:
|
Title: The Journal of the Acoustical Society of America Volume: 119 ISSN: 0001-4966 ISO Abbreviation: J. Acoust. Soc. Am. Publication Date: 2006 Jan |
Date Detail:
|
Created Date: 2006-02-03 Completed Date: 2007-01-22 Revised Date: - |
Medline Journal Info:
|
Nlm Unique ID: 7503051 Medline TA: J Acoust Soc Am Country: United States |
Other Details:
|
Languages: eng Pagination: 620-6 Citation Subset: IM |
Affiliation:
|
Konrad Lorenz Institute for Comparative Ethology, Austrian Academy of Sciences, Savoyenstrasse la, A-1160 Wien, Austria. e.nemeth@klivv.oeaw.ac.at |
Export Citation:
|
APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
|
Acoustics Analysis of Variance Animals Behavior, Animal Songbirds / physiology* Sound* Trees* Tropical Climate Vocalization, Animal* |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
Previous Document: Beamformer performance with acoustic vector sensors in air.
Next Document: Vocal behavior of resident killer whale matrilines with newborn calves: the role of family signature...