[1] SENALIK A C, SCHUENEMAN G, ROSS R J. Ultrasonic-based nondestructive evaluation methods for wood:a primer and historical review[G]//ROSS R J. Nondestructive Evaluation of Wood. 2nd ed. Madison:United States Department of Agriculture, 2015:21-51.
[2] HSU D K, UTRATA D, KUO M. NDE of lumber and natural fiber based products with air coupled ultrasound[C]//Proceedings of the Review of Progress in Quantitative Nondestructive Evaluation. Kingston, RI:AIP, 2010:1533-1540.
[3] 周正干, 魏东.空气耦合式超声波无损检测技术的发展[J].机械工程学报, 2007, 44(3):10-14. http://www.cnki.com.cn/Article/CJFDTOTAL-JXXB200806004.htm

ZHOU Zhenggan, WEI Dong. Progress of air-coupled ultrasonic non-destructive testing technology[J]. Chin J Mech Eng, 2007, 44(3):10-14. http://www.cnki.com.cn/Article/CJFDTOTAL-JXXB200806004.htm
[4] CHIMENTI D E. Review of air-coupled ultrasonic materials characterization[J]. Ultrasonics, 2014, 54(7):1804-1816. doi:  10.1016/j.ultras.2014.02.006
[5] HASEGAWA M, MORI M, MATSUMURA J. Nondestructive Prediction of Bending Strength Performance in Wood with Artificial Hole by Air-coupled Ultrasonic Wave[EB/OL].[2016-03-10]
[6] FANG Yiming, LU Z X, LIN Lujun, et al. Application of air-coupled ultrasonic imaging technique for nondestructive testing of solid wood board[J]. ICIC Expr Lett Part B Appl, 2015, 6(10):2773-2778. http://or.nsfc.gov.cn/handle/00001903-5/319952
[7] GAN T H, HUTCHINS D A, GREEN R J, et al. Noncontact, high-resolution ultrasonic imaging of wood samples using coded chirp waveforms[J]. IEEE Trans Ultrason Ferroelectr Freq Control, 2005, 52(2):280-288. doi:  10.1109/TUFFC.2005.1406553
[8] SANABRIA S J, HILBERS U, NEUENSCHWANDER J, et al. Modeling and prediction of density distribution and microstructure in particleboards from acoustic properties by correlation of non-contact high-resolution pulsed air-coupled ultrasound and X-ray images[J]. Ultrasonics, 2013, 53(1):157-170. doi:  10.1016/j.ultras.2012.05.004
[9] HILBERS U, NEUENSCHWANDER J, HASENER J, et al. Observation of interference effects in air-coupled ultrasonic inspection of wood-based panels[J]. Wood Sci Technol, 2012, 46(5):979-990. doi:  10.1007/s00226-011-0460-9
[10] SIDDIOLO A M, D'ACQUISTO L, MAEVA A R, et al. Wooden panel paintings investigation:an air-coupled ultrasonic imaging approach[J]. IEEE Trans Ultrason Ferroelectr Freq Control, 2007, 54(4):836-846. doi:  10.1109/TUFFC.2007.317
[11] 常俊杰, 卢超, 川嶋紘一郎.非接触空气耦合超声波的材料无损评价与检测[J].浙江理工大学学报 (自然科学版), 2015, 33(4):532-536, 542. http://www.cnki.com.cn/Article/CJFDTOTAL-ZJSG201507019.htm

CHANG Junjie, LU Chao, KAWASHIMA K. Nondestructive material evaluation and testing based on non-contact air-coupled ultrasonics[J]. J Zhejiang Inst Sci Technol, 2015, 33(4):532-536, 542. http://www.cnki.com.cn/Article/CJFDTOTAL-ZJSG201507019.htm
[12] FLEMING M R, BHARDWAJ M C, JANOWIAK J J, et al. Noncontact ultrasound detection of exotic insects in wood packing materials[J]. For Prod J, 2005, 55(6):33-37. https://www.nrs.fs.fed.us/pubs/jrnl/2005/nc_2005_fleming_002.pdf
[13] POUDEL A, STRYCEK J, CHU T P. Air-coupled ultrasonic testing of carbon/carbon composite aircraft brake disks[J]. Mater Eval, 2013, 71(8):987-994. https://www.researchgate.net/profile/Anish_Poudel/publication/262639559_Air-Coupled_Ultrasonic_Testing_of_CarbonCarbon_Composite_Aircraft_Brake_Disks/links/00b4953852c2a10133000000.pdf
[14] HILBERS U, THOEMEN H, HASENER J, et al. Effects of panel density and particle type on the ultrasonic transmission through wood-based panels[J]. Wood Sci Technol, 2012, 46(4):685-698. doi:  10.1007/s00226-011-0436-9