scholarly journals Effect of head rotation on horizontal and median sound localization of band-limited noise

2013 ◽  
Vol 34 (1) ◽  
pp. 56-58 ◽  
Author(s):  
Daisuke Morikawa ◽  
Tatsuya Hirahara
Keyword(s):  
Sound Localization ◽  
Head Rotation ◽  
Band Limited

scholarly journals Active head rolls enhance sonar-based auditory localization performance

2021 ◽  
Vol 17 (5) ◽  
pp. e1008973
Author(s):  
Lakshitha P. Wijesinghe ◽  
Melville J. Wohlgemuth ◽  
Richard H. Y. So ◽  
Jochen Triesch ◽  
Cynthia F. Moss ◽  
...  
Keyword(s):  
Sound Localization ◽  
Head Rotation ◽  
Auditory Localization ◽  
Head Movements ◽  
Head Direction ◽  
Big Brown Bat ◽  
The World ◽  
Localization Performance ◽  
Head Roll ◽  
Time Required

Animals utilize a variety of active sensing mechanisms to perceive the world around them. Echolocating bats are an excellent model for the study of active auditory localization. The big brown bat (Eptesicus fuscus), for instance, employs active head roll movements during sonar prey tracking. The function of head rolls in sound source localization is not well understood. Here, we propose an echolocation model with multi-axis head rotation to investigate the effect of active head roll movements on sound localization performance. The model autonomously learns to align the bat’s head direction towards the target. We show that a model with active head roll movements better localizes targets than a model without head rolls. Furthermore, we demonstrate that active head rolls also reduce the time required for localization in elevation. Finally, our model offers key insights to sound localization cues used by echolocating bats employing active head movements during echolocation.

Method of estimation of hidden correlation of narrowband noise signals

2019 ◽  
pp. 34-39 ◽  
Author(s):  
E.I. Chernov ◽  
N.E. Sobolev ◽  
A.A. Bondarchuk ◽  
L.E. Aristarhova
Keyword(s):  
Signal Processing ◽  
Digital Signal Processing ◽  
New Technology ◽  
Digital Signal ◽  
Measuring Instruments ◽  
Central Frequency ◽  
Pearson Criterion ◽  
Useful Signal ◽  
Band Limited ◽  
Narrowband Noise

The concept of hidden correlation of noise signals is introduced. The existence of a hidden correlation between narrowband noise signals isolated simultaneously from broadband band-limited noise is theoretically proved. A method for estimating the latent correlation of narrowband noise signals has been developed and experimentally investigated. As a result of the experiment, where a time frag ent of band-limited noise, the basis of which is shot noise, is used as the studied signal, it is established: when applying the Pearson criterion, there is practically no correlation between the signal at the Central frequency and the sum of signals at mirror frequencies; when applying the proposed method for the analysis of the same signals, a strong hidden correlation is found. The proposed method is useful for researchers, engineers and metrologists engaged in digital signal processing, as well as developers of measuring instruments using a new technology for isolating a useful signal from noise – the method of mirror noise images.

Sound Localization in the Horizontal Plane in Patients with Supratentorial Cerebrovascular Disorders.

1995 ◽  
Vol 32 (1) ◽  
pp. 50-58
Author(s):  
Hirotaka TANAKA ◽  
Kenji HACHISUKA ◽  
Yoshinori IMAMURA ◽  
Hajime OGATA ◽  
Jinro INOUE
Keyword(s):  
Sound Localization ◽  
Horizontal Plane ◽  
Cerebrovascular Disorders
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