scholarly journals dEchorate: a calibrated room impulse response dataset for echo-aware signal processing

2021 ◽  
Vol 2021 (1) ◽  
Author(s):  
Diego Di Carlo ◽  
Pinchas Tandeitnik ◽  
Cedrić Foy ◽  
Nancy Bertin ◽  
Antoine Deleforge ◽  
...  
Keyword(s):  
Signal Processing ◽  
Impulse Response ◽  
Speech Enhancement ◽  
Position Estimation ◽  
Impulse Responses ◽  
Acoustic Echo ◽  
Geometry Estimation

AbstractThis paper presents a new dataset of measured multichannel room impulse responses (RIRs) named dEchorate. It includes annotations of early echo timings and 3D positions of microphones, real sources, and image sources under different wall configurations in a cuboid room. These data provide a tool for benchmarking recent methods in echo-aware speech enhancement, room geometry estimation, RIR estimation, acoustic echo retrieval, microphone calibration, echo labeling, and reflector position estimation. The dataset is provided with software utilities to easily access, manipulate, and visualize the data as well as baseline methods for echo-related tasks.

Vibration Based Modal Parameters Identification and Wear Fault Diagnosis Using Laplace Wavelet

2005 ◽  
Vol 293-294 ◽  
pp. 183-192 ◽  
Author(s):  
Yanyang Zi ◽  
Xue Feng Chen ◽  
Zheng Jia He ◽  
Peng Chen
Keyword(s):  
Fault Diagnosis ◽  
Impulse Response ◽  
Combustion Engine ◽  
Intake Valve ◽  
Impulse Responses ◽  
Transient Responses ◽  
Vibration Signals ◽  
Modal Parameters Identification ◽  
Non Stationary Signal ◽  
Correlation Filtering

Wavelet transform is a powerful technique well suited to non-stationary signal processing. The properties of wavelet are determined by its basis function. In the fields of modal analysis, mechanical condition monitoring and fault diagnosis, impulse responses or transient responses are very common signals to be analyzed. The Laplace wavelet is a single-sided damped exponential wavelet and is a desirable wavelet basis to analyze signals of impulse response. A correlation filtering approach is introduced using the Laplace wavelet to identify the impulse response from vibration signals. Successful results are obtained in identifying the natural frequency of a hydro-generator shaft, and diagnosing the wear fault of intake valve of an internal combustion engine.

The antenna spacetime system theory of wireless communications

2019 ◽  
Vol 475 (2224) ◽  
pp. 20180699 ◽  
Author(s):  
Said Mikki
Keyword(s):  
System Theory ◽  
Signal Processing ◽  
Wireless Communication ◽  
Impulse Response ◽  
Green's Functions ◽  
Green’S Functions ◽  
Communication Link ◽  
Mathematical Form ◽  
Spatio Temporal ◽  
Antenna Systems

A general deterministic spacetime system theory of antennas suitable for the analysis and design of wireless communication links is rigorously developed using the recently introduced antenna current Green's function formalism. We provide the first complete derivation of the antenna spatio-temporal response to a delta source using only electromagnetic Green's functions, effectively eliminating all field and current distributions in the final expressions. While the theory works well in both space and time, it puts into sharper focus how the spatio-temporal structure of electromagnetic processes imposes restrictions on the signal processing capabilities of antenna systems by constraining the allowable mathematical form of the effective impulse response of the global wireless communication link. It is shown that the antenna current Green's functions of both the receive and transmit terminals, plus the propagation environment Green's functions, are the only quantities needed to obtain the single input–single output link response function in closed form. One of the results deduced from the theory is that an exact impulse response cannot be ascribed to an arbitrary antenna in general, but may be approximated for many applications. The theory can be deployed for future antenna systems research to boost up spectral efficiency (without increasing physical bandwidth) by directly incorporating electromagnetic knowledge into the design of the communication system's signal processing functions.

scholarly journals Impulse response of a generalized fractional second order filter

2012 ◽  
Vol 15 (1) ◽  
Author(s):  
Zhuang Jiao ◽  
YangQuan Chen
Keyword(s):  
Impulse Response ◽  
Stability Property ◽  
Asymptotic Properties ◽  
Second Order ◽  
Impulse Responses ◽  
Critical Stability ◽  
Numerical Examples ◽  
Order Filter

AbstractThe impulse response of a generalized fractional second order filter of the form (s 2α + as α + b)−γ is derived, where 0 < α ≤ 1, 0 < γ < 2. The asymptotic properties of the impulse responses are obtained for two cases, and within these two cases, the properties are shown when changing the value of γ. It is shown that only when (s 2α + as α + b)−1 has the critical stability property, the generalized fractional second order filter (s 2α + as α + b)−γ has different properties as we change the value of γ. Finally, numerical examples to illustrate the impulse response are provided to verify the obtained results.

A study on combining acoustic echo cancelers with impulse response shortening

2006 ◽  
Vol 120 (5) ◽  
pp. 3258-3258
Author(s):  
Stefan Goetze ◽  
Karl‐Dirk Kammeyer ◽  
Markus Kallinger ◽  
Alfred Mertins
Keyword(s):  
Impulse Response ◽  
Acoustic Echo

THE PRICE PUZZLE AND VAR IDENTIFICATION

2014 ◽  
Vol 19 (8) ◽  
pp. 1880-1887 ◽  
Author(s):  
Arturo Estrella
Keyword(s):  
Monetary Policy ◽  
Impulse Response ◽  
Response Function ◽  
Impulse Response Function ◽  
Reduced Form ◽  
Impulse Responses ◽  
Minimal Set ◽  
Price Puzzle ◽  
Single Term ◽  
Structural Vars

In structural VARs, unexpected monetary tightening often leads to the price puzzle, a counterintuitive increase in inflation in the impulse response function. The identification of impulse responses requires at least a minimal set of structural assumptions, and models exhibiting the price puzzle typically use standard assumptions focusing mainly on relationships among contemporaneous disturbances. This note uses a well-established stylized fact, the long lags of monetary policy, to motivate a simple additional identifying assumption. The assumption eliminates a single term in one equation of the reduced form, and with it the price puzzle.

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