Subject-Independent Classification of Japanese Spoken Sentences by Multiple Frequency Bands Phase Pattern of EEG Response During Speech Perception

2017 ◽  
Author(s):  
Hiroki Watanabe ◽  
Hiroki Tanaka ◽  
Sakriani Sakti ◽  
Satoshi Nakamura
Keyword(s):  
Speech Perception ◽  
Multiple Frequency ◽  
Phase Pattern ◽  
Frequency Bands

scholarly journals System Design and Calibration for Wideband Channel Sounding With Multiple Frequency Bands

IEEE Access ◽  
2017 ◽  
Vol 5 ◽  
pp. 781-793 ◽  
Author(s):  
Jinxing li ◽  
Youping Zhao ◽  
Cheng Tao ◽  
Bo Ai
Keyword(s):  
System Design ◽  
Multiple Frequency ◽  
Channel Sounding ◽  
Frequency Bands ◽  
Wideband Channel

scholarly journals Design of Compact MIMO Multiband Antenna for Wireless Radio Communication Application

2021 ◽  
Vol 3 (3) ◽  
pp. 170-181
Author(s):  
C. Anand
Keyword(s):  
Dielectric Constant ◽  
Microstrip Antennas ◽  
Antenna Design ◽  
Multiple Frequency ◽  
Radio Communication ◽  
Frequency Bands ◽  
Multiband Antenna ◽  
Mimo Antenna ◽  
Antenna Performance ◽  
Simulation And Evaluation

Slot and patch modification for the design of a compact multiband antenna with Multi-Input-Multi-Output (MIMO) functionality is proposed in this paper. At various frequency bands, the antenna performance is obtained by modification and addition of slot and patch shapes in the design of the compact MIMO multiband antenna. Addition of slots or patches is done separately in the already existing multiband antenna designs. Whereas in this work, the addition of slot and patch are combined. Arlon Diclad 880 with a dielectric constant of 2.17 - 2.2 (εr) and height 0.75mm is used for the antenna design. The MIMO multiband antenna with the dimension of 12.5 mm × 7.5 mm is designed. On various millimeter-wave frequency bands ranging from 20 GHz to 40 GHz, the MIMO antenna can function as observed in the results of simulation and evaluation. This work shows that microstrip antennas can be added with slots and patches during their design and development, thereby enabling the antenna to operate under multiple frequency bands.

Multiband Antenna Formed of Superimposed Compressed Loops

2014 ◽  
Vol 548-549 ◽  
pp. 780-784
Author(s):  
Jesada Sivaraks ◽  
Settapong Malisuwan
Keyword(s):  
Mobile Communications ◽  
Loop Antenna ◽  
Multiple Frequency ◽  
Frequency Bands ◽  
Multiband Antenna ◽  
Close Proximity ◽  
Nested Loops ◽  
Individual Bands ◽  
Multiple Band ◽  
Conductive Surfaces

A compressed multiple band loop antenna that has multiple superimposed compressed loops. Each compressed loop is formed from numerous segments arrayed in multiple diverse directions so that the enclosed area of that loop and the overall size of the antenna are decreased. Multiple loops are arrayed and superimposed to provide multiple frequency bands of operation and are used to broaden the useful bandwidth of individual-bands. The small size of the compressed antenna facilitates its use in small mobile communications devices requiring internal antennas that operate in close proximity to conductive surfaces. Multiple loops are arrayed in several configurations that include nested and non-nested loops as well as closely located and spatially separated superimposed loops.

A New Classification of Cochleovestibular Malformations and Implications for Predicting Speech Perception Ability after Cochlear Implantation

2015 ◽  
Vol 20 (2) ◽  
pp. 90-101 ◽  
Author(s):  
Sung-Wook Jeong ◽  
Lee-Suk Kim
Keyword(s):  
Speech Perception ◽  
Cochlear Implantation ◽  
Test Scores ◽  
Type A ◽  
Cochlear Nerve ◽  
Type B ◽  
New Classification ◽  
Type D ◽  
Type C

Objectives: The aims of this study were to introduce a new classification of cochleovestibular malformation (CVM) and to investigate how well this classification can predict speech perception ability after cochlear implantation in children with CVM. Methods: Fifty-nine children with CVM who had used a cochlear implant for more than 3 years were included. CVM was classified into 4 subtypes based on the morphology of the cochlea and the modiolus on temporal bone computed tomography (TBCT): normal cochlea and normal modiolus (type A, n = 16), malformed cochlea and partial modiolus (type B, n = 31), malformed cochlea and no modiolus (type C, n = 6), and no cochlea and no modiolus (type D, n = 6). Speech perception test scores were compared between the subtypes of CVM using analysis of covariance with post hoc Bonferroni test. Univariate and multivariate regression analyses were used to identify the significant predictors of the speech perception test scores. Results: The speech perception test scores after implantation were significantly better in children with CVM type A or type B than in children with CVM type C or type D. The test scores did not differ significantly between the implanted children with CVM type A or type B and those without CVM. In univariate regression analysis, the type of CVM was a significant predictor of the speech perception test scores in implanted children with CVM. Multivariate regression analysis revealed that the age at cochlear implantation, cochlear nerve size and preimplantation speech perception test scores were significant predictors of the postimplantation speech perception test scores. The chance of cochlear nerve deficiency increased progressively from CVM type A to type D. Conclusion: The new classification of CVM based on the morphology of the cochlea and the modiolus is simple and easy to use, and correlated well with postimplantation speech perception ability and cochlear nerve status. This simple classification of CVM using TBCT with cochlear nerve assessment by magnetic resonance imaging is helpful in the preoperative evaluation of children with CVM.

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