This possibility could be explored in the future, for example by looking at relationships between acoustical features of begging calls and juvenile calls of nestlings.
Behavioural responses to playbacks of chirp calls are thus due to signallers responding to the acoustic features of chirp calls, and not to some aspect of the playback process.
Given the central role played by advertisement calls in mate recognition and sexual selection in anurans, it is not surprising that bioacoustic features of these calls have been shown to be reliable taxonomical cues at the local species level.
One program draws visual webs that show the length, destination and other features of phone calls made by Mr Madoff and his staff, and then looks for patterns.A fast-growing business where technology will be crucial is fighting money-laundering.
Additional studies are needed to analyze the relationship between intensity and the spectral and temporal features of great calls.
Discriminant function analysis (DFA) was performed to test for individuality based on acoustic features of food calls.
We measured the acoustic features of these calls using custom-built programs in the PRAAT 5.2.10 DSP package [ 49] that automatically logged these variables in an output file.
There is only one well-known example in moths (i.e., Achroia grisella), where females show preference for specific temporal and spectral features of ultrasonic calling songs of conspecific males [3], [9].
The classical description of HIES is a triad of: (a) recurrent staphylococcal skin abscesses without typical features of inflammation called "cold abscesses", (b) recurrent pneumonia with pneumatocele formation, and (c) highly elevated levels of serum IgE.
The titles refer to sister stations in Pittsburgh, where Mr. Abraham grew up, and the score features snippets of call-in radio, along with numerous popular songs, passages of static and electronic pulses and original music by Amber Lee Parker.
