摘要: A hearing faculty test and apparatus therefore is based on the finding that sound input to ear gives rise a returned wave from related condition of inner ear, this being detectable as an echo drum. The preferably comprises sealing aural probe (1) housing transducers (2, 3) respectively project repetitive transient by pulse generator (4) activation pick-up for detection (5) successive echoes time-gating. Detected are averaged during processing (6) display. occurs about 5-20 ms after its maximum operating frequency 50Hz appropriate. continuous can be used with consequent interference rapid changes acoustic impedance frequency. Another alternative involve drum movement waves.
harvard.edu
scitation.org
aip.org
lens.org 参考文章(9)
John W. Ward, Automatic acoustic impedance meter ,(1975)
Richard J. Pittaro, Christopher C. Dileo, Ultrasonic thickness measuring method and apparatus ,(1975)
Erwin H Rock, Irwin Klar, Test probe for an impedance audiometer ,(1974)
Arthur W. Rochussen, Erwin H. Rock, Irwin Klar, Automatic means for tympanometric testing ,(1975)
Arthur W. Rochussen, Irwin Klar, Method and apparatus for an ipsilateral reflex test ,(1974)
Grason R, Arguimbau L, Acoustic admittance testing apparatus ,(1971)
Michael John Bennett, Electro-acoustic impedance bridges ,(1976)
Adrian R. Kerouac, Hand held ear test probe Journal of the Acoustical Society of America. ,vol. 66, pp. 1579- 1579 ,(1975) , 10.1121/1.383401
Carl S. Baylor, Probe for audiometric apparatus ,(1975)