Influence of the direction of sound propagation along vertical atmospheric paths on the acoustic signal characteristics

2018 ◽  
Author(s):  
Liudmila G. Shamanaeva ◽  
Yu. B. Burkatovskaya ◽  
V.V. Belov ◽  
N.P. Krasnenko
Keyword(s):  
Acoustic Signal ◽  
Sound Propagation ◽  
Signal Characteristics

Time dependences of acoustic signal characteristics during fracture of metal samples

2015 ◽  
Vol 462 (1) ◽  
pp. 475-478 ◽  
Author(s):  
L. R. Botvina ◽  
T. B. Petersen ◽  
A. P. Soldatenkov ◽  
M. R. Tyutin
Keyword(s):  
Acoustic Signal ◽  
Signal Characteristics

Application Study on of Wavelet Analysis during Compression Ruptrue Procedure of Coal Sample

2012 ◽  
Vol 616-618 ◽  
pp. 2182-2186
Author(s):  
Rui Ma ◽  
Tian Jun Zhang ◽  
Bao Ming Qiao
Keyword(s):  
Wavelet Analysis ◽  
Uniaxial Compression ◽  
Acoustic Signal ◽  
Original Data ◽  
Compression Process ◽  
Application Study ◽  
Signal Characteristics ◽  
Frequency Changes ◽  
Wavelet Transform Modulus Maximum ◽  
Ae Counts

This paper study the acoustic signal characteristics of coal and rock mass under uniaxial compression by the tests of acoustic emission(AE),which obtain the variation of AE counts and energy.Compressing on original data use wavelet analysis,and extracting the characteristics of signal with the wavelet sym-basis,then decomposing and remodeling the wavelet coefficients,the negative singularity degree indicators of adjacent scales can be got.The results showed that the wavelet transform modulus maximum used to identify the negative singularity degree can achieve the position of the frequency changes point of the acoustic signal,which is of certain guiding significance for prediction of the uniaxial compression process.

Vibration and acoustic signal characteristics of solid particles carried in sand-water two-phase flows

2019 ◽  
Vol 345 ◽  
pp. 159-168 ◽  
Author(s):  
Kai Wang ◽  
Gang Liu ◽  
Yichen Li ◽  
Min Qin ◽  
Jinbang Wang ◽  
...  
Keyword(s):  
Acoustic Signal ◽  
Solid Particles ◽  
Two Phase Flows ◽  
Two Phase ◽  
Signal Characteristics

Influence of Internal Wave on the Sound Propagation in the Subsurface Bubble Layer

2011 ◽  
Vol 8 (1) ◽  
pp. 54-64
Author(s):  
R. Grimshaw ◽  
L.A. Ostrovsky ◽  
A.S. Topolnikov ◽  
K.R. Khusnutdinova
Keyword(s):  
Internal Wave ◽  
Speed Of Sound ◽  
Acoustic Signal ◽  
Sound Propagation ◽  
Japan Sea ◽  
Subsurface Ocean ◽  
Ocean Layer ◽  
Bubble Layer ◽  
Linear Internal Wave ◽  
Local Speed

In the paper the influence of non-linear internal wave on the propagation of acoustic signal in the subsurface ocean layer containing gas bubbles is considered. During interaction with surface waves the internal wave causes its collapse and influences the structure of bubble layer. Inhomogeneous structure of the layer promotes the local speed of sound and intensity of scattering near the ocean surface to modulate by internal wave with slight shift in phase in the direction of its propagation, which agree with recent experimental observations made on the shelf of Japan Sea.

Relationship between Carrot Firmness with Acoustic Signal Characteristics

2016 ◽  
Vol 40 (2) ◽  
pp. e12384 ◽  
Author(s):  
Yang Liu ◽  
Yong-Hai Sun ◽  
Liu Yang ◽  
Li-Bo Yu ◽  
Qian Mao ◽  
...  
Keyword(s):  
Acoustic Signal ◽  
Signal Characteristics

Acoustic Signal Characteristics Measured with the LAMBDA III During CHURCH STROKE III

1980 ◽  
Author(s):  
Istvan B. Gereben ◽  
William M. Carey ◽  
Richard D. Doolittle
Keyword(s):  
Acoustic Signal ◽  
Signal Characteristics
Sign in / Sign up

Export Citation Format

Share Document