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I’m often asked what is the difference between free field microphones, diffuse field microphones and pressure microphones. For a run-of-the-mill ½ inch microphone the short answer is nothing. However the long answer is a bit more involved. Basically if the sample rate is 10 kHz or below and an accuracy of ±2dB is acceptable then there is no [...] Share:
The requirement was to develop a ‘standard’ test for assessing the sound quality of power steering pumps in vehicles. Measurements needed to be objective so that the method would be suitable for evaluating dissimilar vehicles and different types of pump. Noise is an important consideration when a consumer is selecting a new vehicle. It is therefore [...] Share:
Prosig USA Inc. is proud to announce an alliance with SenSound, maker of powerful 3D acoustic holography software. To kick off the new Prosig / SenSound alliance a demo day has been scheduled to give engineers a thorough understanding of the potential available in acoustic testing. The demo will be at TechTown, in Detroit, MI, [...] Share:
In 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 of the different types of transducer and the applications they are normally associated with. Share:
The 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 [...] Share:
In 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 [...] Share:
When working with audio signals a common requirement is to be able to equalise, cut or boost various frequency bands. [...] Share:
Some 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 or apply a different weighting factor. Using DATS it is a simple task to instruct the WEIGHT module to either simply unweight the data [...] Share:
The 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 a single value that categorised the [...] |
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