acoustic impedance
The active control of acoustic impedance
... the specific acoustic controlled on Experimental results support the theoretical work presented in this thesis, demonstrating active control of specific acoustic impedance for normally i[r] ...
363
Studies on Thermo acoustic Parameters in binary liquid mixtures of MIBK with 1- Propanol, 1-Butanol and 1-Pentanol at 303.15K-A new approach by Direct Measurement of Acoustic Impedance
... in the above binary mixtures, it is found that the excess intermolecular free butanol mixture is the lowest while its excess acoustic impedance value is the highest at concentration ranging from 0.4 to 0.5 ...
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Development of a Time Efficient Approach to Measure the Acoustic Impedance of Industrial Insulating Materials
... The Impedance tube measurements using the standing wave ratio method (BS_EN_ISO 10534-1:2001) was used having one microphone that is moveable to probe at different position points, and the samples are circular in ...
13
Impact Damage Detection in Fiberglass Composites Using Low Acoustic Impedance-Based PZT Transducers
... data, acoustic techniques such as UT and PZT-based methods have a limitation in detecting the near-surface defects, including the delamination of composites ...the impedance signature of the structures is ...
12
Design and Evaluation of a Novel Low Acoustic Impedance-Based PZT Transducer for Detecting the Near-Surface Defects
... of impedance-based technique has been discussed already by [12, ...by acoustic impedance or Mohammadabadi [21] used the technique for damage detection in wooden ...
16
Use of Acoustic Impedance Measurement in Screening for Middle Ear Disease in Children Task Force of the Symposium on Impedance Screening for Children
... Children Task Force of the Symposium on Impedance Screening for Children Use of Acoustic Impedance Measurement in Screening for Middle Ear Disease in. Services[r] ...
6
Lateral Rock Property Prediction by Post Stack Acoustic Impedance Inversion: A Case Study from Offshore Niger Delta
... stack acoustic impedance seismic inversion study was carried out by integrating well logs and 3D seismic data obtained in a Niger Delta offshore ...frequency impedance model derived from the well ...
13
Optimising low acoustic impedance back-fill material wave barrier dimensions to shield structures from ground borne high speed rail vibrations
... The numerical model is then used to assess the ability of a range of wave barrier configurations to protect nearby sites from railway vibration. It is found that depth and length have a strong influence on the mitigation ...
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A New Alternative Method for the Generation of Acoustic Filters, Modulating Acoustic Impedance: Theoretical Model
... of acoustic filters, then using the broad term studies of transmission line and varying conditions ...in acoustic but also in other research field, like signal processing, telecommunications, medicine, ...
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The Application of Acoustic Impedance Measurements to Pediatric Clinical Practice
... ( absolute) or dynamic (relative.)3’#{176}2 Static mea- surement of acoustic impedance refers to meas- urement made with ambient air pressure in the external canal and middle-ear structu[r] ...
9
A Broadband Approach to Measuring Acoustic Impedance and Roughness using Spherical Hydrophones
... A spherical (or hemispherical) transducer system could be of use to measure the acoustic properties of the seafloor using: an AUV, a ROV, a free hanging system deployed from a boat, or a towed system. However, for ...
198
IMPACT OF PIPING IMPEDANCE AND ACOUSTIC CHARACTERISTICS ON CENTRIFUGAL COMPRESSOR SURGE AND OPERATING RANGE ABSTRACT
... an impedance amplification perspective, large downstream volumes with low resistance actually avoid pulsation amplification and improve the acoustic response of the ...an acoustic resonance, the low ...
10
Large-Scale clustering of acoustic segments for sub-word acoustic modelling
... to acoustic segments from the same phone within the same left and right contexts, there are many other possible sources of systematic variability, such as the accent of the ...determine acoustic models for ...
125
Evaluation of the Acoustic Environment in a Protestant Church Based on Measurements of Acoustic Descriptors
... appropriate acoustic characteristics, which can be characterized by acoustic descriptors such as Reverberation Time (RT), Clari- ty (C80) and Definition ...the acoustic quality of a protestant church ...
18
New Solutions for the Three-Dimensional Electrical Impedance Equation and its Application to the Electrical Impedance Tomography Theory
... many Electrical Impedance Tomography Medical Devices are strongly connected with Neural Network Modeling (see e.g. [11],[21],[23] and [24]). Such models require an ef cient training phase (see for example [1],[7]) ...
6
Seismic Ray Impedance Inversion
... small value on each diagonal element of the autocorrelation matrix. This is a standard procedure in classical seismic deconvolution processing (Robinson and Treitel, 1980), which regards both the reflectivity sequence ...
174
Microfluidic Electrical Impedance Spectroscopy
... The impedance measurement setup needs to be more ...taking impedance measurements more user-friendly, a pogo push-pin could be connected to a printed circuit ...
72
Acoustic Metamaterials in Aeronautics
... the acoustic absorption at specific frequencies for improving quality of sound/noise from an aircraft and hence its acceptability from the community, ...reducing acoustic pollution while even maintaining ...
19
Impedance audiometry: Is it a wise investment?
... would benefit. As a research tool for determining the natural history of serous otitis media, with or without intervention, and as a teaching device, it should I)e of significant ultimat[r] ...
5
Fractional Waveguide with Impedance Walls
... an impedance walls fractional parallel plate waveguide, two distinct ranges of the ordinary impedance have been found in which fractional impedance ofthe guiding walls behaves in different ways ...
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