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Acoustic Material Testing Using Impedance Tube

Sourabh Dogra, Arpan Gupta
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Broadband Electrical Impedance Matching of Transmitter Transducer for Acoustic Logging While Drilling Tool

IEEE Sensors Journal, 2022
An electrical impedance-matching network (EIMN) is proposed to achieve a broad transmitter transducer bandwidth for the acoustic logging while drilling tool.
Y. Gou, Xin Fu
semanticscholar   +1 more source

[350m heliox saturated diving test--dynamic observation on hearing threshold, brainstem evoked response and acoustic impedance].

Zhonghua er bi yan hou ke za zhi, 1991
Four divers were investigated simulating a diving of 350m with saturated heliox under compression, performed in Jan 1989 at Navy Medical Institute. Changes in hearing threshold, brainstem evoked response and acoustic impedance were observed. The 4 divers experienced no tinnitus, hard of hearing and earache during compression and decompression ...
L Wang
openaire   +2 more sources

Test Method for Impedance and Absorption of Acoustical Materials by Impedance Tube Method

, 2016
E33 Committee
openaire   +2 more sources

Test Method for Impedance and Absorption of Acoustical Materials by Impedance Tube Method

, 2011
E33 Committee
openaire   +2 more sources

Grazing Flow Acoustic Impedance Testing for the NASA AST Program

8th AIAA/CEAS Aeroacoustics Conference & Exhibit, 2002
Judith Gallman, Robert Kunze
openaire   +2 more sources

Satellite vibration isolation using periodic acoustic black hole structures with ultrawide bandgap

Journal of Vibration and Acoustics, 2022
A lightweight whole-spacecraft vibration isolation system with broadband vibration attenuation capability is of great significance to the protection of satellites during the launch phase.
Xiaofei Lyu, Hui Sheng, Meng-Xin He, Qian Ding, Lihua Tang, Tianzhi Yang   +5 more
semanticscholar   +1 more source

Passive Impedance Sensing Using a SAW Resonator-Coupled Biosensor for Zero-Power Wearable Applications

IEEE Sensors Journal, 2022
A bio-sensing scheme, which acquires impedance information of a capacitive biosensor by using the reflected RF signal from a surface acoustic wave (SAW) resonator connected to the biosensor, is proposed. This technique requires no power to be supplied to
Xicai Yue, J. Kiely, R. Luxton, Boyang Chen, C. McLeod, Emanuel Manos Drakakis   +5 more
semanticscholar   +1 more source

Modal decomposition method for acoustic impedance testing in square ducts

The Journal of the Acoustical Society of America, 2006
Accurate duct acoustic propagation models are required to predict and reduce aircraft engine noise. These models ultimately rely on measurements of the acoustic impedance to characterize candidate engine nacelle liners. This research effort increases the frequency range of normal-incidence acoustic impedance testing in square ducts by extending the ...
Todd, Schultz, Louis N, Cattafesta, Mark, Sheplak   +2 more
openaire   +2 more sources

Ultrathin, High Sensitivity Polymer-based Capacitive Micromachined Ultrasound Transducers (polyCMUTs) for Acoustic Emission Sensing in Fiber Reinforced Polymers

IUS, 2022
The arising need to monitor structural health via acoustic emissions (AE) has led to a need for low cost, high sensitivity, and wide bandwidth transducers. For metals, piezoelectric transducers are reliably used, however fiber reinforced polymers present
Jonas Welsch, E. Cretu, R. Rohling, Carlos D. Gerardo   +3 more
semanticscholar   +1 more source