Sometimes it doesn’t hurt to revisit some of the basic building blocks that form the foundation of what we do. And so we have gathered together a few of our most popular past articles that deal with the fundamental aspects of measuring and analysing noise and vibration data. Please leave a comment if you have a favourite. Or, if you think there is a topic we could cover in future posts, then let us know. The links to the articles start right under the line below, so, let’s go ‘back to basics’…
Fourier Analysis
Dr Colin Mercer
Notes On Fourier Analysis
Fourier analysis takes a signal and represents it either as a series of cosines (real part) and sines (imaginary part) or as a cosine with phase (modulus and phase form). As an…
Fourier analysis takes a signal and represents it either as a series of cosines (real part) and sines (imaginary part) or as a cosine with phase (modulus and phase form). As an…
Standard Octave Bands
Dr Colin Mercer
Standard Octave Bands
The “standard” centre frequencies for 1/3 octave bands are based upon the Preferred Numbers. These date from the 19th century when Col. Charles Renard (1849–1905) was given the…
The “standard” centre frequencies for 1/3 octave bands are based upon the Preferred Numbers. These date from the 19th century when Col. Charles Renard (1849–1905) was given the…
What Is Resonance?
James Wren
What Is Resonance?
A resonance occurs when a structure or material naturally oscillates at a high amplitude at a specific frequency. This frequency is known as a structural resonant frequency…
A resonance occurs when a structure or material naturally oscillates at a high amplitude at a specific frequency. This frequency is known as a structural resonant frequency…
What Is Resonance?
James Wren
What Is Resonance?
A resonance occurs when a structure or material naturally oscillates at a high amplitude at a specific frequency. This frequency is known as a structural resonant frequency…
A resonance occurs when a structure or material naturally oscillates at a high amplitude at a specific frequency. This frequency is known as a structural resonant frequency…
A, B & C Weightinghttps://blog.prosig.com/2001/06/06/a-b-c-weighting/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…
How To Analyze Noise & Vibration In Rotating Machineshttps://blog.prosig.com/2011/08/09/how-to-measure-noise-vibration-in-rotating-machines/In this article we will look at the basic steps behind a simple rotating machinery study. We won’t look in great detail at some of the techniques involved – we deal with these…
How Do I Do Hammer Impact Tests And Modal Testing?https://blog.prosig.com/2013/02/11/what-is-hammer-impact-testing/This is often also known as Modal Testing. It is a method of testing that allows us to calculate the natural frequencies (modes), modal masses, modal damping ratios and mode…
What is Synchronous (Angular) Sampling?https://blog.prosig.com/2011/11/09/what-is-synchronous-angular-sampling/The term synchronous data is usually applied to vibration or acoustic data that is captured from an item of rotating equipment at regularly spaced angle intervals as distinct…
Frequency, Hertz & Ordershttps://blog.prosig.com/2002/02/03/frequency-hertz-orders/The most common form of digitising data is to use a regular time based method. That is data is sampled at a constant rate specified as a number of samples/second. The…
What are dB? What is noise floor? What is Dynamic Range?https://blog.prosig.com/2008/04/14/what-is-db-noise-floor-dynamic-range/Most engineers are probably familiar with or have come across the decibel or dB as a unit of measurement. Its most common use is in the field of acoustics where it is used to…
Understanding Filter Characteristicshttps://blog.prosig.com/2011/10/04/understanding-filter-characteristics/Recently when discussing with an engineering student the characteristics of filters, it became clear that some confusion exists around this subject area. This note attempts to…
The articles above were contributed by…
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Chris' early love of computers & technology (Sinclair ZX80's, Commodore PETs & Apple ]['s) grew into a career in software development, product development, team leadership, web development, and marketing. He was General Manager at Prosig, part of CMTG, until June 2024. Chris graduated with an HND from Portsmouth Polytechnic and in 2019 completed an Executive MBA at the University of Winchester where he focused on innovation and strategy.
Latest posts by Chris Mason (see all)
- Rotating Machinery Vibration Analysis: Keeping Your Machines Humming Along - November 27, 2023
- Vibration Control and Isolation: A Comprehensive Guide for Engineers - November 6, 2023
- Modal Analysis in the Real World - October 6, 2023
Could you send the basics article as a single .pdf to be read offline?
I can not read well from the screen.
You can find my articles online under NVH Simulation at my website.
Thanks,
Alan Duncan
Hi Alan. I’m afraid we don’t have these particular articles readily to hand in PDF format. However, I believe they will all be included in the next edition of our Handbook that is due out later this year. The new edition will be announced here on the blog. So keep and eye out and request a copy to get all theses articles in print or PDF form.
Thanks for notify us with this post. This post can help me in understand all the basics.