We present a detailed theoretical description of wave propagation in an acoustic gradient-index system with cylindrical symmetry and demonstrate its potential to numerically control acoustic waves in different ways.Th...We present a detailed theoretical description of wave propagation in an acoustic gradient-index system with cylindrical symmetry and demonstrate its potential to numerically control acoustic waves in different ways.The trajectory of an acoustic wave within the system is derived by employing the theory of geometric acoustics,and the validity of the theoretical descriptions is verified numerically by using the finite element method simulation.The results show that by tailoring the distribution function of the refractive index,the proposed system can yield a tunable manipulation of acoustic waves,such as acoustic bending,trapping,and absorbing.展开更多
(Appeared in Other Periodicals than Acoustica Sinica)0.General;1.Phystal Acoustics;2.Underwater Sound;3.Mechanical Vibration and Shock;4.Noise andNoise Control;5.Utrasonics;6.Speech Acoustics and Speech Communication;...(Appeared in Other Periodicals than Acoustica Sinica)0.General;1.Phystal Acoustics;2.Underwater Sound;3.Mechanical Vibration and Shock;4.Noise andNoise Control;5.Utrasonics;6.Speech Acoustics and Speech Communication;7.Physiologica Acoustics;8.Architectural Acoustics;9.Electroacoustics;10.Acoustics Measurement and Instrumentation;11.Atmo-spheric Acoustics;12.Geoacoustics;13.Pioacoustics;14.Musical Acoustics.展开更多
(Appeared in other periodicals than acta acustica all in Chinese)0.General;1.Physical acoustics;2.Underwater sound;3.Mechanical vibration and shock;4.Noise and noise control;5.Ultrasonics;6.Speech acoustics and speech...(Appeared in other periodicals than acta acustica all in Chinese)0.General;1.Physical acoustics;2.Underwater sound;3.Mechanical vibration and shock;4.Noise and noise control;5.Ultrasonics;6.Speech acoustics and speech communication;7.Physio-logical acoustics;8.Architectural acoustics;9.Electroacoustics; 10.Acoustical measurement andinstrumentation;11.Atmospheric acoustics,12.Geoacoustics,13.Bioacoustics;14.Musical acous-tics;15.Signal Prosessing. 0.GeneralAn outlook of some basic researches in hearing(Ⅰ),Fang Zhi,Applied Acoustics,9(1990),No.3,1.The acoustics design of auditorium of Beiing Worker’s club,xiang duangqi,Applied Acoustics,9(1990), No.3,15.Principle and application of the SAW passive transponders,Suo Zhaohe,Applied Acoustics,9(1990), No.3,42.An international overview of human-machine speech communication,Zhang Jialu,Applied Acoustics,9(1990), No.4,35.展开更多
0.General;1.Physical Acoustics;2.Underwater Sound;3.Mechanical Vibration and Shock;4.Noise and Four groups of guinea pigs were exposed to bud sound(3h,1kHz.125 dB SPL).One group inhaled airas control(C-group),and the ...0.General;1.Physical Acoustics;2.Underwater Sound;3.Mechanical Vibration and Shock;4.Noise and Four groups of guinea pigs were exposed to bud sound(3h,1kHz.125 dB SPL).One group inhaled airas control(C-group),and the other groups ingaled2 ATA hyperbaric oxygen(HBO)for30 minuteseach time.These three groups were called,respectively,prevention group(P-group)inhaling HBO oncebefore exposure,treatment group(T-group)inhaling HBO daily for14 days after exposure,andprevention-treatment group(PT-group)inhaling HBO once before exposure and once a day for14 days af-ter exposure.After exposure.the threshold of the cortical auditory potential evoked by click rose in all ani-mals.Hearing loss of C-group was the severest,up to70dB,while those of P-group and PT-group where53dB and51dB,respectively(p<0.01,compared with that of C-group).Hearing loss of T-group was68.5dB.Smilar phenomena were found in the measurement by tone-burst.The above aspects lasted21 days until these animals were killed.The average trauma length of展开更多
Some trends in foreign NDT,Ma Minggang,Non Destructive Testing,11(1989 ),No.2,41.Ultrasonic thickness gauge and its tendency,Zhang Qingxi,Non destructive Testing,11 (1989 ),No.7,187.Analysis of acoustical Properties o...Some trends in foreign NDT,Ma Minggang,Non Destructive Testing,11(1989 ),No.2,41.Ultrasonic thickness gauge and its tendency,Zhang Qingxi,Non destructive Testing,11 (1989 ),No.7,187.Analysis of acoustical Properties of listening rooms,Zhu Feng.Audio Engineering,1989,No.1,6Exploration on popularization and application of AM stereo technique in the field of medium-wave broadcasting inChina,Zhang dumin,Audio Engineering,1989,No.3,33.On the development of mode experiment and its analysis(3),Zhang Lingmi,Journal of Vibration and shock,8 (1989),No.1,52.A review of ship vibration research in China(1 ),Guo rixiu,Suo Zhiqiang,Journal of Vibration and shock,8 (1989 ),No.161.展开更多
0.GeneralProgress in last 10 years about acoustics testing technique in-duct,Zhao Songling,Journal of Technical Acoustics,11(1992),No.1-2,13.Sound emission in liquid excited by laser and its application to ocean,Feng ...0.GeneralProgress in last 10 years about acoustics testing technique in-duct,Zhao Songling,Journal of Technical Acoustics,11(1992),No.1-2,13.Sound emission in liquid excited by laser and its application to ocean,Feng Shaosong,Jouranl of Tech- nical Acoustics,11(1992),No.1-2,17.The developing tendency of ultrasonic dianosis,Xu Zhishang,Journal of Technical Acoustics,11(1992), No.1-2,22.Ultrasound microscope and it’s applications,W.S.Gan et al.,Journal of Technical Acoustics,11(1992), No.1-2,26.展开更多
基金supported by the National Basic Research Program of China(Grant Nos.2010CB327803 and 2012CB921504)the National Natural Science Foundation of China(Grant Nos.11174138,11174139,11222442,81127901,and 11274168)+1 种基金NCET-12-0254the Project Funded by the Priority Academic Program Development of Jiangsu Higher Education Institutions,China
文摘We present a detailed theoretical description of wave propagation in an acoustic gradient-index system with cylindrical symmetry and demonstrate its potential to numerically control acoustic waves in different ways.The trajectory of an acoustic wave within the system is derived by employing the theory of geometric acoustics,and the validity of the theoretical descriptions is verified numerically by using the finite element method simulation.The results show that by tailoring the distribution function of the refractive index,the proposed system can yield a tunable manipulation of acoustic waves,such as acoustic bending,trapping,and absorbing.
文摘(Appeared in Other Periodicals than Acoustica Sinica)0.General;1.Phystal Acoustics;2.Underwater Sound;3.Mechanical Vibration and Shock;4.Noise andNoise Control;5.Utrasonics;6.Speech Acoustics and Speech Communication;7.Physiologica Acoustics;8.Architectural Acoustics;9.Electroacoustics;10.Acoustics Measurement and Instrumentation;11.Atmo-spheric Acoustics;12.Geoacoustics;13.Pioacoustics;14.Musical Acoustics.
文摘(Appeared in other periodicals than acta acustica all in Chinese)0.General;1.Physical acoustics;2.Underwater sound;3.Mechanical vibration and shock;4.Noise and noise control;5.Ultrasonics;6.Speech acoustics and speech communication;7.Physio-logical acoustics;8.Architectural acoustics;9.Electroacoustics; 10.Acoustical measurement andinstrumentation;11.Atmospheric acoustics,12.Geoacoustics,13.Bioacoustics;14.Musical acous-tics;15.Signal Prosessing. 0.GeneralAn outlook of some basic researches in hearing(Ⅰ),Fang Zhi,Applied Acoustics,9(1990),No.3,1.The acoustics design of auditorium of Beiing Worker’s club,xiang duangqi,Applied Acoustics,9(1990), No.3,15.Principle and application of the SAW passive transponders,Suo Zhaohe,Applied Acoustics,9(1990), No.3,42.An international overview of human-machine speech communication,Zhang Jialu,Applied Acoustics,9(1990), No.4,35.
文摘0.General;1.Physical Acoustics;2.Underwater Sound;3.Mechanical Vibration and Shock;4.Noise and Four groups of guinea pigs were exposed to bud sound(3h,1kHz.125 dB SPL).One group inhaled airas control(C-group),and the other groups ingaled2 ATA hyperbaric oxygen(HBO)for30 minuteseach time.These three groups were called,respectively,prevention group(P-group)inhaling HBO oncebefore exposure,treatment group(T-group)inhaling HBO daily for14 days after exposure,andprevention-treatment group(PT-group)inhaling HBO once before exposure and once a day for14 days af-ter exposure.After exposure.the threshold of the cortical auditory potential evoked by click rose in all ani-mals.Hearing loss of C-group was the severest,up to70dB,while those of P-group and PT-group where53dB and51dB,respectively(p<0.01,compared with that of C-group).Hearing loss of T-group was68.5dB.Smilar phenomena were found in the measurement by tone-burst.The above aspects lasted21 days until these animals were killed.The average trauma length of
文摘Some trends in foreign NDT,Ma Minggang,Non Destructive Testing,11(1989 ),No.2,41.Ultrasonic thickness gauge and its tendency,Zhang Qingxi,Non destructive Testing,11 (1989 ),No.7,187.Analysis of acoustical Properties of listening rooms,Zhu Feng.Audio Engineering,1989,No.1,6Exploration on popularization and application of AM stereo technique in the field of medium-wave broadcasting inChina,Zhang dumin,Audio Engineering,1989,No.3,33.On the development of mode experiment and its analysis(3),Zhang Lingmi,Journal of Vibration and shock,8 (1989),No.1,52.A review of ship vibration research in China(1 ),Guo rixiu,Suo Zhiqiang,Journal of Vibration and shock,8 (1989 ),No.161.
文摘0.GeneralProgress in last 10 years about acoustics testing technique in-duct,Zhao Songling,Journal of Technical Acoustics,11(1992),No.1-2,13.Sound emission in liquid excited by laser and its application to ocean,Feng Shaosong,Jouranl of Tech- nical Acoustics,11(1992),No.1-2,17.The developing tendency of ultrasonic dianosis,Xu Zhishang,Journal of Technical Acoustics,11(1992), No.1-2,22.Ultrasound microscope and it’s applications,W.S.Gan et al.,Journal of Technical Acoustics,11(1992), No.1-2,26.
