Results 211 to 220 of about 9,983 (255)
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[Clinical applications of acoustic impedance tests].
Annali di laringologia, otologia, rinologia, faringologia, 1975This manuscript briefly outlines the most important areas of clinical impedance audiometry. The author has emphasized the use of impedance audiometry in differentiating different types of middle ear pathology and utilizing the stapedial reflex in the determination of malingering as well as an overall test of the auditory function of the auditory ...
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The bulk acoustic properties of a porous medium, derived from a single impedance test
The Journal of the Acoustical Society of America, 1999In the majority of engineering applications, porous sound absorbing media may be treated as equivalent fluids, with vibration of the solid skeleton being neglected. Most measurement techniques for the bulk acoustic properties of such media (e.g., complex characteristic impedance and propagation constant) involve tests on large samples of material ...
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Smart acoustic impedance sensors for the testing of engineering materials
1998This paper is dedicated to the problems of nondestructive testing of various materials. A new method which we call an adaptive contact impedance evaluation (ACIE) is discussed.[...].
Dapkus, Rimantas, Daugėla, Antanas
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[The role of acoustic impedance test in the diagnosis for occupational noise induced deafness].
Zhonghua lao dong wei sheng zhi ye bing za zhi = Zhonghua laodong weisheng zhiyebing zazhi = Chinese journal of industrial hygiene and occupational diseases, 2018Objective: To investigate the characteristics of acoustic impedance test and its diagnostic role for occupational noise induced deafness, in order to provide an objective basis for the differential diagnosis of occupational noise induced deafness. Methods: A retrospective study was conducted to investigate the cases on the diagnosis of occupational ...
H, Chen +5 more
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Construction and testing of a modern acoustic impedance tube
2012The acoustic impedance of a material describes its reflective and absorptive properties. Acoustic impedance may be measured in a wide variety of ways. This thesis describes the construction and testing of an acoustic impedance measurement tube which employs modem Fourier Transform techniques.
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Test Method for Impedance and Absorption of Acoustical Materials by Impedance Tube Method
2008+5 more sources
On the Value of Acoustic Impedance Tests in the Clinic
International Journal of Audiology, 1971V. M. Priede, R. R. A. Coles
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2009
Eine der größten Herausforderungen für die Entwicklung zukünftiger schadstoffarmer Gasturbinenkraftwerke ist die Gewährleistung eines stabilen Verbrennungsprozesses. Um die immer strikter werdenden Emissionsrichtlinien, vor allem hinsichtlich NOx, zu erfüllen, führte die Gasturbinenindustrie die Mager-Vormisch-Verbrennung ein.
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Eine der größten Herausforderungen für die Entwicklung zukünftiger schadstoffarmer Gasturbinenkraftwerke ist die Gewährleistung eines stabilen Verbrennungsprozesses. Um die immer strikter werdenden Emissionsrichtlinien, vor allem hinsichtlich NOx, zu erfüllen, führte die Gasturbinenindustrie die Mager-Vormisch-Verbrennung ein.
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Test Method for Impedance and Absorption of Acoustical Materials by Impedance Tube Method
2022openaire +1 more source
Grazing Flow Acoustic Impedance Testing for the NASA AST Program
8th AIAA/CEAS Aeroacoustics Conference & Exhibit, 2002Judith Gallman, Robert Kunze
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