Ecological and acoustic responses of bush crickets to anthropogenic and natural ecotones

2021 ◽  
Author(s):  
Aileen C. van der Mescht ◽  
James S. Pryke ◽  
René Gaigher ◽  
Michael J. Samways
Keyword(s):  
Acoustic Responses ◽  
Bush Crickets

scholarly journals Comparison and Validation of Acoustic Response Models for Wind Noise Reduction Pipe Arrays

2017 ◽  
Vol 34 (2) ◽  
pp. 401-414 ◽  
Author(s):  
Julien Marty ◽  
Stéphane Denis ◽  
Thomas Gabrielson ◽  
Milton Garcés ◽  
David Brown
Keyword(s):  
Noise Reduction ◽  
Acoustic Response ◽  
Detection Capability ◽  
Wind Noise ◽  
Response Models ◽  
Operational Conditions ◽  
Measurement Systems ◽  
International Monitoring ◽  
Wind Noise Reduction ◽  
Acoustic Responses

AbstractThe detection capability of the infrasound component of the International Monitoring System (IMS) is tightly linked to the performance of its wind noise reduction systems. The wind noise reduction solution implemented at all IMS infrasound measurement systems consists of a spatial distribution of air inlets connected to the infrasound sensor through a network of pipes. This system, usually referred to as “pipe array,” has proven its efficiency in operational conditions. The objective of this paper is to present the results of the comparison and validation of three distinct acoustic response models for pipe arrays. The characteristics of the models and the results obtained for a defined set of pipe array configurations are described. A field experiment using a newly developed infrasound generator, dedicated to the validation of these models, is then presented. The comparison between the modeled and empirical acoustic responses shows that two of the three models can be confidently used to estimate pipe array acoustic responses. This study paves the way to the deconvolution of IMS infrasound data from pipe array responses and to the optimization of pipe array design to IMS applications.

Third Order Nonlinear Optical Responses of Metallophthalocyanines in Films and Solutions

1992 ◽  
Vol 247 ◽  
Author(s):  
Roger J. Reeves ◽  
Richard C. Powell ◽  
Warren T. Ford ◽  
Young H. Chang ◽  
Weiming Zhu
Keyword(s):  
Excited State Absorption ◽  
Third Order ◽  
Incident Intensity ◽  
Optical Responses ◽  
A Value ◽  
Fast Electronic ◽  
Probe Spectroscopy ◽  
Acoustic Responses ◽  
532 Nm ◽  
Pulse Probe

ABSTRACTDihydrogen, copper, platinum, and lead octakis(2-ethylhexyloxy)phthalocyanines (Pc's) were studied in polystyrene films at 532 nm and in chloroform solutions at 1064 nm by picosecond degenerate four wave mixing. Resonant χ(3) values of Pc's at 532 nm (a local minimum in the absorption spectrum) at a time coincident with the 20 psec pump pulses were as high as 104 times that of CS2 by extrapolation of the response from 1 wt % PtPc in polystyrene film to a value for pure PtPc. Delay of the probe pulse as long as 3 nsec revealed acoustic responses stronger than the fast electronic responses. The films showed the expected quadratic dependence of the instantaneous reflectivity on incident intensity only for a decade of magnitude of intensity, 100–1000 MW/cm2, with the output saturating at higher intensities. Excited state absorption at 532 nm was detected in the film samples by pulse-probe spectroscopy and was shown to be a factor in the saturation observed in the NLO signals. Nonresonant χ(3) values at 1064 nm were as high as 120 times that of CS2 from measured responses of 1 wt % chloroform solutions of Pc's. Time delay of the probe revealed both fast electronic and slower acoustic responses at 1064 nm too.

Acoustic Responses of Vestibular Afferents in a Model of Superior Canal Dehiscence

2004 ◽  
Vol 25 (3) ◽  
pp. 345-352 ◽  
Author(s):  
John P. Carey ◽  
Timo P. Hirvonen ◽  
Timothy E. Hullar ◽  
Lloyd B. Minor
Keyword(s):  
Superior Canal Dehiscence ◽  
Vestibular Afferents ◽  
Acoustic Responses ◽  
Canal Dehiscence

Three-dimensional hydroelasciticity analysis of acoustic responses of ship structures

2010 ◽  
Vol 22 (S1) ◽  
pp. 802-809 ◽  
Author(s):  
Ming-song Zhou ◽  
You-sheng Wu ◽  
Yong-lin Ye
Keyword(s):  
Three Dimensional ◽  
Ship Structures ◽  
Acoustic Responses

The Mechanics of Stridulation in Bush Crickets (Tettigonioidea, Orthoptera)

1970 ◽  
Vol 52 (3) ◽  
pp. 495-505 ◽  
Author(s):  
W. J. BAILEY
Keyword(s):  
Detailed Analysis ◽  
Pure Tone ◽  
Sound Production ◽  
Sound Radiation ◽  
Rotational Axis ◽  
The Right ◽  
Bush Crickets

1. A method has been devised by which the isolated tegmina of bush crickets can be actuated in such a manner as to simulate the insect's natural song. 2. The actuator was used to make a detailed analysis of the mechanics of sound production, with particular reference to the emission of the more or less pure tone at 15 kHz., characteristic of Homorocoryphus nitidulus. 3. Results involving damping and cautery indicated that the area of the right tegmen responsible for the radiation of this sound was the mirror frame, the vein enclosing the classical mirror membrane. 4. Further experiments involving transduced sound and a probe microphone led to the construction of sound radiation maps of the right tegmen which supported the above view. 5. The cantilever hypothesis, involving the mirror frame with the axis of the vestigial file as the cantilever's rotational axis, was considered in the light of the Homorocoryphus type. 6. The Homorocoryphus type differed from the Conocephalus type (on which the cantilever hypothesis was based) in that a simpler cantilever is formed in a line direct from the plectrum to the tip of the frame arm.

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