scholarly journals Three-microphone probe bias errors for acoustic intensity and specific acoustic impedance

2018 ◽  
Vol 143 (2) ◽  
pp. EL81-EL86 ◽  
Author(s):  
Joseph S. Lawrence ◽  
Eric B. Whiting ◽  
Kent L. Gee ◽  
Reese D. Rasband ◽  
Tracianne B. Neilsen ◽  
...  
2017 ◽  
Vol 142 (4) ◽  
pp. 2208-2218 ◽  
Author(s):  
Eric B. Whiting ◽  
Joseph S. Lawrence ◽  
Kent L. Gee ◽  
Tracianne B. Neilsen ◽  
Scott D. Sommerfeldt

Author(s):  
Hejie Lin ◽  
Turgay Bengisu ◽  
Zissimos P. Mourelatos

2019 ◽  
Vol 27 (01) ◽  
pp. 1850050 ◽  
Author(s):  
Daipei Liu ◽  
Steffen Marburg ◽  
Christian Geweth ◽  
Nicole Kessissoglou

In this work, numerical methods to identify the surface areas of a vibrating structure that radiate sound are implemented for cases of structures with inhomogeneous distributions of viscous Rayleigh damping. The intensity-based techniques correspond to acoustic intensity evaluated in terms of the acoustic pressure and particle velocity, non-negative intensity evaluated in terms of the acoustic impedance matrix obtained at the structural surface, and back-calculated non-negative intensity evaluated in terms of the acoustic impedance matrix obtained at a far-field receiver surface. Different configurations of inhomogeneous damping are applied to two elastic structures corresponding to a plate and a cylindrical shell. To examine the influence of inhomogeneous damping on sound radiation, the acoustic intensity on the structural surface, the acoustic intensity on several different far-field receiver surfaces, non-negative intensity and back-calculated non-negative intensity are numerically compared for different inhomogeneous damping cases.


1978 ◽  
Vol 21 (2) ◽  
pp. 295-308
Author(s):  
Terry L. Wiley ◽  
Raymond S. Karlovich

Contralateral acoustic-reflex measurements were taken for 10 normal-hearing subjects using a pulsed broadband noise as the reflex-activating signal. Acoustic impedance was measured at selected times during the on (response maximum) and off (response minimum) portions of the pulsed activator over a 2-min interval as a function of activator period and duty cycle. Major findings were that response maxima increased as a function of time for longer duty cycles and that response minima increased as a function of time for all duty cycles. It is hypothesized that these findings are attributable to the recovery characteristics of the stapedius muscle. An explanation of portions of the results from previous temporary threshold shift experiments on the basis of acoustic-reflex dynamics is proposed.


2014 ◽  
Vol 33 (2) ◽  
pp. 163-168
Author(s):  
Xiujuan WANG ◽  
Jiliang WANG ◽  
Wei LI ◽  
Nittala Satyavani ◽  
Kalachand Sain

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