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          Prosig Student Project Prize for University of Portsmouth – 2018

          Prosig Student Project Prize for University of Portsmouth – 2018

          Every year Prosig provide a prize for the best student project at both the University of Portsmouth and the University of Southampton. We are pleased to announce that this year’s Prosig Engineering Prize at University of Portsmouth has been awarded to  Simon…

          Sound, Vibration & Acoustics Digest #11

          Sound, Vibration & Acoustics Digest #11

          Here’s our latest collection of noise, vibration & acoustics stories from all corners of the internet. We hope you enjoy them. Leave us a comment. Architectural Acoustics via 99% Invisible Reverb: The Evolution of Architectural Acoustics There are two primary…

          How Do I Upsample and Downsample My Data?

          How Do I Upsample and Downsample My Data?

          This post covers how to?upsample and downsample data and the possible pitfalls of this process. Before we cover the technical details let us first explain what we mean by upsample and downsample and why we may need to use it.…

          What Are Vibration, Torsional Vibration & Shaft Twist?

          What Are Vibration, Torsional Vibration & Shaft Twist?

          When analyzing rotating shafts some terms are often confused. This post?will attempt to explain the differences. So, what are vibration, torsional vibration and twist? What is Vibration? We measure at least one sensor on one channel of our measurement device…

          Pick of Twitter #1 – Acoustics – October 2016

          Pick of Twitter #1 – Acoustics – October 2016

          We’ve been carefully tracking acoustics related tweets on Twitter and present here a few of the highlights. We do this sort of thing so that you don’t have to. Don’t forget that you can follow us on Twitter as well…

          Real World Noise & Vibration Measurement – An Interview

          Real World Noise & Vibration Measurement – An Interview

          Richard O’Sullivan is a respected engineer who has worked throughout the world on noise & vibration measurement solutions in automotive, aerospace and beyond. Hear about some of the problems he has faced and how Prosig’s systems have helped him solve…

          Prosig Will Be At Automotive Testing Show in Novi

          Prosig Will Be At Automotive Testing Show in Novi

          You will be able to meet Prosig and some of our top bloggers at Testing Expo USA 2016 in Novi on 25th, 26th & 27th October 2016. Come along and have a chat. More details of the conference can be…

          The Effect of the Nyquist Theory on Rotational Order Analysis

          The Effect of the Nyquist Theory on Rotational Order Analysis

          Nyquist theory is generally understood, but this understanding usually relates to time sampling and the conversion to the frequency domain. Rotational order analysis and the effect of the Nyquist frequency are, however, less well understood. Most engineers will understand the…

          How to avoid a ground loop – It’s not only a problem with accelerometers

          How to avoid a ground loop – It’s not only a problem with accelerometers

          When using modern, high technology measurement devices one can often be tripped up by the simplest things. The most common is the ground loop. Time and again this issue rears its head. So, let’s talk about how to avoid a…

          Sound, Vibration & Acoustics Digest #10

          Sound, Vibration & Acoustics Digest #10

          Here’s our latest collection of noise, vibration & acoustics stories from all corners of the internet. We hope you enjoy them. Leave us a comment. Energy via The Register Hate noisy jets above you? What if they were charging your…

          Seismic Qualification Testing (Part 1)

          Seismic Qualification Testing (Part 1)

          Seismic Qualification Testing for US Nuclear Power Generating Stations Part 1 (Random Vibration Testing) The nuclear power industry in North America (USA, Canada & Mexico) requires seismic qualification testing for any equipment being installed in nuclear power generating stations. If…

          Exhaust Vibration Measurement – A Case Study

          Exhaust Vibration Measurement – A Case Study

          Exhaust Vibration Measurement – Customer?Requirement One of Prosig’s customers needed?to perform exhaust vibration measurement on some?of their vehicles. They contracted Prosig to take the measurements and provide reports of the results. Prosig provided?a?P8020 data acquisition systems and DATS software. The…

          What Is Amplitude Quantization Error?

          What Is Amplitude Quantization Error?

          Amplitude Quantization Error – Summary This article explains what amplitude quantization error is and what can be done to avoid it. Typically quantization error is caused during acquisition of data. It is synonymous to rounding error. In order to explain…

          Speech Articulation Index – What Does It Mean?

          Speech Articulation Index – What Does It Mean?

          There are many ways to calculate speech articulation index?and each has its advantages in different applications. Prosig’s DATS includes four methods for evaluating the Articulation Index?as seen in the table below. All four methods are essentially the same and they…

          Viewing Operational Deflection Shapes (ODS) from a Gas Turbine Generator

          Viewing Operational Deflection Shapes (ODS) from a Gas Turbine Generator

          As its name suggests Operational Deflection Shape analysis shows the vibration pattern experienced during normal operational condition. This is different to other structural vibration tests such as impact hammer tests, bump tests or shaker tests which require a more controlled excitation force and are used to determine specific characteristics of the structure under test, such as natural or resonant frequencies.

          Come and See Prosig at Automotive Testing Expo China 2015

          Come and See Prosig at Automotive Testing Expo China 2015

          Prosig ?will be exhibiting at the Automotive Testing Expo China 2015?at the Shanghai Everbright Convention & Exhibition Center in China from 15th to 17th September 2015. Automotive Testing Expo China 2015 is set to capitalise on the rapid growth in…

          Sound, Vibration & Acoustics Digest #9

          Sound, Vibration & Acoustics Digest #9

          Here’s our latest collection of noise, vibration and acoustics stories from all corners of the internet. We hope you enjoy them. Leave us a comment. Acoustics via Business Insider Owl Wings Are Helping Silence Airplanes, Fans and Wind Turbines Owls…

          Is Orchestral Noise Damaging Hearing?

          Is Orchestral Noise Damaging Hearing?

          Having played the trumpet for over 10 years I have left many an orchestral rehearsal with my ears ringing courtesy of the onslaught of noise from the trombone section behind me. In searching for a topic for my final year research project as part of my studies at Southampton University, the risk of hearing loss to orchestral musicians seemed a natural choice.

          Processing pump data – a classic case of amplitude modulation

          Processing pump data – a classic case of amplitude modulation

          When dealing with some vibration data from a pump, we observed some strange phenomena in the data. It turned out to be a classic case of amplitude modulation. Here we explain what that means.

          “The History and Future of Fourier Analysis” Workshop at SAE 2015, Grand Rapids

          “The History and Future of Fourier Analysis” Workshop at SAE 2015, Grand Rapids

          Are you attending the SAE 2015 Noise and Vibration Conference and Exhibition?in Grand Rapids, Michigan, USA from 22nd to 25th June 2015? Why not go and see Dr Colin Mercer, one of our principal authors, co-present the technical session –…

          SAE 2015 Noise and Vibration Conference in Grand Rapids, Michigan

          SAE 2015 Noise and Vibration Conference in Grand Rapids, Michigan

          Prosig are pleased?to announce that we will be exhibiting at the SAE 2015 Noise and Vibration Conference and Exhibition?in Grand Rapids, Michigan, USA from 22nd to 25th June 2015. This is the premier technical event dedicated to noise, vibration and…

          How Do I Measure Whole Body Vibration?

          How Do I Measure Whole Body Vibration?

          Whole Body Vibration (WBV) analysis for continuous vibration uses assessment criteria defined in the ISO2631 standard and the EEC vibration directive 2002/44/EC. These assessments are based on the processing of vibration weighted acceleration data (the data must be acceleration data…

          Creating An End of Line Vibration Test System

          Creating An End of Line Vibration Test System

          Prosig was contracted by Imperial Electric in Akron, Ohio to integrate a system for end of line vibration test for electric motors they manufacture. The requirement?was to qualify motors under final test to verify that vibration levels are within vibration…

          RMS From Time History And FFT Spectrum

          RMS From Time History And FFT Spectrum

          The RMS of a time history is a measure of the signal’s overall energy and is often used when extracting features from a signal for prognosis and trending of vibration data. For a time history which has been digitised at…

          Sound, Vibration & Acoustics Digest #8

          Sound, Vibration & Acoustics Digest #8

          To welcome you to 2015 here’s our latest collection of news articles, videos and other miscellaneous links on noise, sound, acoustics and vibration that have caught our eye over the past few weeks. We hope you enjoy them. Sounds you…

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