noise Archive
Made To Measure
Posted on June 6, 2006 | 4 CommentsIn this note the different types of transducers that can be used with the Prosig P8000 series data acquisition system are discussed. The article deals with the design and function...
Exhaust Development Using A Prosig P8000 System
Posted on February 20, 2006 | 2 CommentsThe following note describes an application of the Prosig P8000/DATS system in the refinement of an automotive exhaust muffler design for a major after-market exhaust manufacturer in Europe. The particular...
A Simple Noise Test
Posted on August 26, 2005 | 2 CommentsIn a recent article we described how the Prosig P8000 hardware and DATS software had been used to help Dalmeny Racing diagnose a problem with an exhaust bracket on their...
Audio Equalisation Filter & Parametric Filtering
Posted on May 17, 2005 | No CommentsWhen working with audio signals a common requirement is to be able to equalise, cut or boost various frequency bands. A large number of hardware devices on the market provide...A, B & C Weighting
Posted on June 6, 2001 | No CommentsSome devices, particularly digital tape recorders, apply A-weighting to all their data in order to achieve acceptable data compression. This is fine unless you want to analyse the unweighted data...
Understanding The Cross Correlation Function
Posted on June 6, 2001 | 3 CommentsTo illustrate the use of the cross correlation function, a source location example is shown below. For this it is assumed that there is a noise source at some unknown...
Time Varying Overall Level
Posted on May 1, 2001 | No CommentsA common requirement in noise and vibration analysis is to find the overall level of a signal as a function of time. Now the overall level is a measure of...
Interpretation of the Articulation Index
Posted on April 11, 2001 | 1 CommentThe Articulation Index or AI gives a measure of the intelligibility of hearing speech in a given noise environment. The metric was originally developed in 1949 in order to give...
