Akusticheskij Zhurnal

The work is devoted to studying of recognition of psychoneurological state of children aged 5–14 with autism spectrum disorder (ASD), n = 35, and typically developing (TD) children, n = 45, by adults. A perceptual analysis was carried out, in which adult native speakers of the Russian language (auditors), n = 206, took part. Test sequences (audiotests) with words and phrases of ASD and TD children selected from spontaneous speech recordings were created for perceptual research. Auditors’ task was to determine psychoneurological state of children (typical/atypical development) based on auditory perception. A spectrographic analysis of phrases of children was carried out. Phrases of ASD children in comparison with TD children are characterized by lower speech rate, fewer words, great stressed and unstressed vowel duration, great values of pitch in phrase, word, stressed and unstressed vowel.

A. S. Nikolaev

Акустический журнал

Recognition of psychoneurological state of children with autism spectrum disorder by features of speech: acoustic and perceptual features

自闭症谱系障碍儿童心理神经状态的识别：语音特征——声学与感知特征

The results of a high-frequency experiment for the detection and direction estimation of underwater sound noisy source are presented. The experiment was conducted in the shallow waters of the Black Sea coast. The noise emission of the source was received by three vector-scalar receivers located on the bottom. By using holographic processing, the detection and direction estimation of a moving underwater source against the background of intense shipping in the experiment region were carried out. Estimates of the input signal-to-noise ratio are presented.

M. Yu. Glushchenko

V. M. Kuzkin

Yu. V. Matvienko

S. A. Pereselkov

Yu. A. Khvorostov

S. A. Tkachenko

Holographic method of under-water noise source localization in shallow water

浅水水下噪声源定位的全息方法

The work is devoted to the numerical simulation of aeroacoustic characteristics of a supersonic jet issuing from a Laval nozzle at the design Mach number M=2. The results of the large-eddy simulations (LES) are presented. Characteristics of mean jet flow and its fluctuations, as well as the characteristics of the far-field jet noise, including its azimuthal content, are obtained. The results of the simulation are compared with experimental data and their acceptable agreement is shown. It is concluded that there are various noise generation mechanisms in the considered jet.

O. P. Bychkov

I. Yu. Mironyuk

I. A. Solntsev

G. A. Faranosov

M. A. Yudin

Analysis of aeroacoustic characteristics of a supersonic jet at designed conditions based on numerical simulation

基于数值模拟的超声速喷流设计条件下气动声学特性分析

The ability of dolphin`s auditory system to recognize and classify noise signals according to certain invariant features under the influence of noise interference and spatial uncertainty of their simultaneous presentation was studied. The bottlenose dolphins trained to differentiate such signals had to solve this problem under conditions simulating real marine ones, when the perception of a useful signal occurs against the background of similar signals and noise interference. First, the noise signals were sequentially presented to the animal against the background of white masking noise. Further the dolphin had to identify a signal of a positive class from several simultaneously sounding sound sources. The efficiency of the animal was evaluated at several given levels of noise interference. In this case, the actual noise interference was both white noise and simultaneously sounding negative signals. It`s shown that the efficiency and noise immunity of dolphin`s auditory system depend on the degree of alternativeness of the spatial uncertainty of the simultaneous presentation of signals.

A. V. Akhi

Recognition and classification of noise signals by dolphins under conditions of noise interference and spatial uncertainty of their simultaneous presentation

海豚在噪声干扰和同时呈现的空间不确定性条件下对噪声信号的识别与分类

Using X-ray topography on laboratory and synchrotron X-ray sources, the distribution of deformations in the volume of two types of AT-cut quartz resonators of different sizes were obtained. From a comparison of X-ray data and the amplitude-frequency characteristics of the resonators, a correlation between the deformation patterns and the features of oscillatory processes for operating modes and their harmonics, as well as for parasitic modes, was established. A connection between oscillations in parasitic modes, which manifest themselves in the amplitude inhomogeneity, and the topology of the resonators is found. The applied significance of the obtained results for the development and optimization of new designs of piezoelectric elements and the development of their manufacturing technology is noted.

E. S. Ibragimov

F. S. Pilyak

A. G. Kulikov

N. V. Marchenkov

Y. V. Pisarevsky

A. A. Kaloyan

Y. A. Pershin

Y. A. Glazunova

S. A. Demin

A. S. Yuzhalkin

S. S. Pashkov

G. N. Cherpukhina

Investigation of the spatial distribution of deformations in quartz piezo elements by x-ray topography

通过X射线形貌术研究石英压电元件中的变形空间分布

Publication Information	Publisher: Izdatel'stvo Nauka，Publishing cycle: ，Journal Type: journal，Open Access Journals: No
Basic data	Year of publication: 1999，Proportion of original research papers: ，Self Citation Rate:， Gold OA Rate:

Akusticheskij Zhurnal

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Recognition of psychoneurological state of children with autism spectrum disorder by features of speech: acoustic and perceptual features

Holographic method of under-water noise source localization in shallow water

Analysis of aeroacoustic characteristics of a supersonic jet at designed conditions based on numerical simulation

Recognition and classification of noise signals by dolphins under conditions of noise interference and spatial uncertainty of their simultaneous presentation

Investigation of the spatial distribution of deformations in quartz piezo elements by x-ray topography

Recognition of psychoneurological state of children with autism spectrum disorder by features of speech: acoustic and perceptual features

Holographic method of under-water noise source localization in shallow water

Analysis of aeroacoustic characteristics of a supersonic jet at designed conditions based on numerical simulation

Recognition and classification of noise signals by dolphins under conditions of noise interference and spatial uncertainty of their simultaneous presentation

Investigation of the spatial distribution of deformations in quartz piezo elements by x-ray topography