Speech perception in children using advanced acoustic signal processing

2003 ◽  
Vol 56 (10) ◽  
pp. 34 ◽  
Author(s):  
Judith Gravel ◽  
Laurie Hanin ◽  
Ellen Lafargue ◽  
Janie Chobot-Rodd ◽  
Yael Bat-Chava
Energies ◽  
2021 ◽  
Vol 14 (13) ◽  
pp. 3725
Author(s):  
Paweł Zimroz ◽  
Paweł Trybała ◽  
Adam Wróblewski ◽  
Mateusz Góralczyk ◽  
Jarosław Szrek ◽  
...  

The possibility of the application of an unmanned aerial vehicle (UAV) in search and rescue activities in a deep underground mine has been investigated. In the presented case study, a UAV is searching for a lost or injured human who is able to call for help but is not able to move or use any communication device. A UAV capturing acoustic data while flying through underground corridors is used. The acoustic signal is very noisy since during the flight the UAV contributes high-energetic emission. The main goal of the paper is to present an automatic signal processing procedure for detection of a specific sound (supposed to contain voice activity) in presence of heavy, time-varying noise from UAV. The proposed acoustic signal processing technique is based on time-frequency representation and Euclidean distance measurement between reference spectrum (UAV noise only) and captured data. As both the UAV and “injured” person were equipped with synchronized microphones during the experiment, validation has been performed. Two experiments carried out in lab conditions, as well as one in an underground mine, provided very satisfactory results.


2013 ◽  
Vol 543 ◽  
pp. 171-175
Author(s):  
Jose Andrés Somolinos ◽  
Rafael Morales ◽  
Carlos Morón ◽  
Alfonso Garcia

In the last years, many analyses from acoustic signal processing have been used for different applications. In most cases, these sensor systems are based on the determination of times of flight for signals from every transducer. This paper presents a flat plate generalization method for impact detection and location over linear links or bars-based structures. The use of three piezoelectric sensors allow to achieve the position and impact time while the use of additional sensors lets cover a larger area of detection and avoid wrong timing difference measurements. An experimental setup and some experimental results are briefly presented.


2021 ◽  
Author(s):  
Julia Schwarz ◽  
Katrina (Kechun) Li ◽  
Jasper Hong Sim ◽  
Yixin Zhang ◽  
Elizabeth Buchanan-Worster ◽  
...  

Face masks can cause speech processing difficulties. However, it is unclear to what extent these difficulties are caused by the visual obstruction of the speaker’s mouth or by changes of the acoustic signal, and whether the effects can be found regardless of semantic context. In the present study, children and adults performed a cued shadowing task online, repeating the last word of English sentences. Target words were embedded in sentence-final position and manipulated visually, acoustically, and by semantic context (cloze probability). First results from 16 children and 16 adults suggest that processing language through face masks leads to slower responses in both groups, but visual, acoustic, and semantic cues all significantly reduce the mask effect. Although children were less proficient in predictive speech processing overall, they were still able to use semantic cues to compensate for face mask effects in a similar fashion to adults.


2019 ◽  
Vol 8 (3) ◽  
pp. 2012-2016

This paper presents a novel technique for calculation of attenuation of acoustic signals in the materials in underwater channel. A laboratory procedure and algorithms have been developed for finding attenuation. In many applications like sonar signal processing acoustic signal attenuation in the dome or in an enclosure are required to be known. Finding the actual attenuation while signal passes through the materials is very useful in calculating the precise power transmitted through the enclosures. The attenuation in materials mainly dependent on type of material, signal frequency and launch angle of the signal. A proper procedure has been presented in this paper


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