By H. C. Gerhardt (auth.), Dr. Steven L. Hopp, Dr. Michael J. Owren, Dr. Christopher S. Evans (eds.)
The final a long time have introduced an important bring up in examine on acoustic communi cation in animals. ebook of clinical papers on either empirical and theoretical elements of this subject has significantly elevated, and a brand new magazine, Bioacoustics, is solely dedicated to such articles. Coupled with this proliferation of labor is a acceptance that the various present matters are top approached with an interdisciplinary standpoint, requiring technical and theoretical contributions from a couple of parts of inquiry that experience often been separated. With the extraordinary exception of a set edited via Lewis (1983), there were fewvolumes predominatelyfocused on technical matters in comparative bioacoustics to keep on with up the earlyworks edited by way of Lanyon and Tavolga (1960) and Busnel (1963). It used to be the large development of workmanship c:()ncerning this subject specifically that supplied the preliminary impetus to arrange this quantity, which makes an attempt to provide primary details from either theoretical and utilized elements of present bioacoustics learn. whereas a very finished evaluate will be impractical, this quantity bargains a simple remedy of a wide selection of issues aimed toward offering a conceptual framework during which researchers can tackle their very own questions. each one presentation is designed to be worthwhile to the broadest attainable spectrum of researchers, together with either these presently operating in any of the various and numerous disciplines of bioacoustics, and others that could be new to such studies.
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Extra resources for Animal Acoustic Communication: Sound Analysis and Research Methods
Anim Behav 49: 283-303 Dooling RJ (1982) Auditoryperception in birds. In: Kroodsma DE, Miller EH, Ouellet H (eds) Acoustic communication in birds. VOll. Academic Press, New York, p 95 Duellman WE, Trueb L (1986) Biology of amphibians. McGraw-Hill, NewYork Dunia R, Narins PM (1989) Temporal integration in an anuran auditory nerve. Hear Res 39: 287-298 Elsner N (1994) The search for the neural centers of cricket and grasshopper song. In: Schildberger K, Elsner N (eds) Neural basis ofbehavioural adaptations.
Figure 2 shows the frequency response of the recursive smoothing filter described in Eq. (4). As illustrated, the amplitudes ofhigh-frequency components (fast variations) are attenuated. Phase-shifts imposed by the filter are also frequency-dependent, but in a quite different II1apIler than in the case of amplitude. The variable 0) will appear throughout the following discussion, referring to frequency rather than time. The waveform cos( wn) is a discrete-time signal (recall that n is a discrete number) of frequency 0).
C Interval histogram showrng Ilulse patterning during one minute of calling 6y a pine woods treefrog (H. femoralis). The X-axis for each panel is shown as powers of 10 seconds; a more conventional scale of time intervals is shown at the bottom of the figure 20 H. C. 4 Spectrally Complex Calls The calls of three closely - related species of treefrogs - the green (H. cinerea), barking (H. gratiosa) and pine barrens treefrogs (H. andersonii) - range in duration from about 120 to 200 ms, and are repeated at rates of one to two calls per second (Figure u).
Animal Acoustic Communication: Sound Analysis and Research Methods by H. C. Gerhardt (auth.), Dr. Steven L. Hopp, Dr. Michael J. Owren, Dr. Christopher S. Evans (eds.)