Points from the discussion on “Space-time sampling and likelihood ratio processing in acoustic pressure fields”

1963 ◽  
Vol 26 (1) ◽  
pp. 91
Keyword(s):  
Likelihood Ratio ◽  
Acoustic Pressure ◽  
Space Time ◽  
Time Sampling ◽  
Pressure Fields

Lattice theory models for space-time sampling of acoustic signals

2013 ◽  
Vol 133 (5) ◽  
pp. 3524-3524
Author(s):  
Kaushallya Adhikari ◽  
John R. Buck
Keyword(s):  
Lattice Theory ◽  
Acoustic Signals ◽  
Space Time ◽  
Time Sampling

Accuracy of integral migration transformation in dependence on space-time sampling

1985 ◽  
Vol 29 (3) ◽  
pp. 248-256 ◽  
Author(s):  
Miroslav Novotný ◽  
A. Zátopek
Keyword(s):  
Space Time ◽  
Time Sampling

An Experimental Methodology for the Reconstruction of Three-Dimensional Acoustic Pressure Fields in Ducts

2013 ◽  
Vol 136 (1) ◽  
Author(s):  
Giovanni Ferrara ◽  
Lorenzo Ferrari ◽  
Giulio Lenzi
Keyword(s):  
Acoustic Pressure ◽  
Three Dimensional ◽  
Field Investigation ◽  
Experimental Methodology ◽  
3D Analysis ◽  
Test Rig ◽  
Noise Emission ◽  
Lean Combustion ◽  
Pressure Fields ◽  
Acoustic Instabilities

The claim for low emission engines, imposed by strict environmental legislation, has prompted the aeronautical industry to reduce both noise emission and pollution by using lean combustion technology. These engines are often affected by acoustic instabilities that can compromise their correct functioning. A 3D acoustic wave field investigation is increasingly relevant for a correct design and comprehension of this kind of phenomena. Numerical codes are widely used for this type of analysis but an experimental validation is still required due to the complexity of the real phenomena involved in acoustic generation and propagation. While the wall acoustic pressure can be easily measured, very few examples of radial measurement for a 3D analysis can be found in research on this subject. This paper presents an example of a radial measurement of a 3D acoustic pressure field by means of a waveguide probe based on a 1/4" pressure microphone. In particular, several probe geometries were designed and calibrated on a specialized test rig. In order to verify the adopted methodology, the acoustic 3D pressure fields of two simplified geometries were measured and compared with those from a theoretical model describing the actual conditions of the test rig.

Sign in / Sign up

Export Citation Format

Share Document