Application Case Studies Jump to A, B, C, D, E, F, H, I, M, N, P, R, S, T, U, V A Simple Automotive Noise Test Analysis of Airflow Instabilities in HVAC units Analyzing Shaft Twist And Repairing Damaged Tachos Building a new test model Comparing Vibration On Bicycle Suspension Creating An End of Line Vibration Test System Developing an Algorithm for Tick Detection Do You Need To Measure Brake Noise? Engine Model Being Put Through Its Paces Evaluating A Closed Loop Control System For High Pressure Pumps Exhaust Vibration Measurement – A Case Study Fatigue & Durability Testing How Do I Calibrate An Impact Hammer? How do we design or modify a system to avoid resonance? In-situ balance of an Open Cycle Gas Turbine In-Vehicle Voltage Supply From Cigar Lighter / Accessory Sockets Is Orchestral Noise Damaging Hearing? Measuring Exhaust Noise Using A P8000 System Measuring For Success With A Hammer Impact Test Measuring Torsional Crank Shaft Jitter Measuring Torsional Twist & Vibration Along a Shaft or Through a Geartrain Measuring Torsional Vibration 101 Methods To Remove Spikes From Data Non Linear Calibration Curve And Polynomial Processing pump data – a classic case of amplitude modulation Prosig supply high channel count data acquisition system to new RAL Space NSTF facility Rotating Machinery Test Rig Seismic Qualification Testing (Part 1) Shaft Displacement Measurement Using A PROTOR System Sound Steering Testing Times : Why & How We Measure Noise & Vibration The Intelligent Way To Sort, Extract & Analyze Signals Understanding & Measuring Noise Using Source Contribution Analysis to analyze complex structural dynamics issues Using Your VCM To Monitor Auxiliary Equipment Vibration Condition Monitoring Doesn’t Get More Mobile Than This! Vibration Condition Monitoring Using Your Android Smartphone Signal Processing & Algorithms Jump to A, B, C, D, E, F, G, H, I, M, N, O, P, Q, R, S, T, U, V, W A Different Way Of Averaging – Time Synchronous Averaging A Guide To Digital Filtering A Guide To Resonance A Method Of Diagnosing Cyclic Events In An Internal Combustion Engine A Simple Frequency Response Function A Simple Step-by-step Guide To Bearing Vibration Analysis A Weighting. And B. And C. Acceleration, Velocity & Displacement Spectra – Omega Arithmetic Aliasing, Orders and Wagon Wheels Amplitude And Energy Correction – A Brief Summary Analysis of Airflow Instabilities in HVAC units Analysis of Dynamic Engine Vibration – Angular Vibration in High Performance Engines Analyzing Shaft Twist And Repairing Damaged Tachos Are My Hammer Impact Results Valid? (1) Linearity Are My Hammer Impact Results Valid? (2) Reciprocity Are My Hammer Impact Results Valid? (3) Time Invariance Audio Equalisation Filter & Parametric Filtering Automated data capture, analysis and reporting Average Waterfalls Or Average Orders? Averaging Frequency Response Functions From A Structure Bearing & Gearbox Vibration Analysis using Demodulation Techniques? (Part 2) Bearing & Gearbox Vibration Analysis Using Demodulation Techniques (Part 1) Calculating Velocity Or Displacement From Acceleration Time Histories Cleaning Up Data Converting Acceleration, Velocity & Displacement Creating An End of Line Vibration Test System Data Smoothing : RC Filtering And Exponential Averaging Data Windows : What, why and when? Developing an Algorithm for Tick Detection Do Missing Tachometer Pulses Mean The End Of The Road For Your Test? Does The Signal Have A Gaussian Probability Density? Don’t Let Spikes Spoil Your Data Dynamic Range And Overall Level : What Are They ? Evaluating A Closed Loop Control System For High Pressure Pumps Example of performing a Moving Average Examples Of Event Extraction And Removal Examples of Structural Animation Exhaust Vibration Measurement – A Case Study Fatigue & Durability Testing Generating speed v time information from noise & vibration signals Hammer Testing: Free or fixed support? High Dynamic Range – Fact or Fiction? High Pass Filtering And Tacho Signals How Do I Calibrate An Impact Hammer? How Do I Convert Between Acceleration, Velocity & Displacement? How Do I Convert To Decibels? How Do I Downsample Data? How do I find the natural frequency of an inlet manifold? How Do I Measure Whole Body Vibration? How do I perform vibration analysis on a cylinder head and inlet manifold? How Do I Upsample and Downsample My Data? How do we design or modify a system to avoid resonance? How Many Samples Per Revolution Are Required To Study A Particular Order How To Analyze & Measure Torsional Vibration How To Analyze Noise & Vibration In Rotating Machines How To Calculate A Resultant Vector How To Choose A Sample Rate For A Required Analysis Frequency Range Human Exposure To Vibration In Buildings (DIN 4150-2:1999-06 & DIN 45669-1:1995-06) Interpolation Versus Resampling To Increase The Sample Rate Interpretation of the Articulation Index Is Orchestral Noise Damaging Hearing? Is That Tone Significant? – The Prominence Ratio Measuring Exhaust Noise Using A P8000 System Measuring For Success With A Hammer Impact Test Measuring Torsional Crank Shaft Jitter Measuring Torsional Twist & Vibration Along a Shaft or Through a Geartrain Measuring Torsional Vibration 101 Methods To Remove Spikes From Data Multiplane Balancing – Zero Imbalance or Specified Imbalance Negative Frequencies – What Are They? Noise & Vibration Analysis: Back To Basics Non Linear Calibration Curve And Polynomial Order Cuts And Overall Level Order Tracking, Frequency and Hertz Orders v Time – Comparing Overall Levels Phase Angle Between Signals Pick of Twitter #1 – Acoustics – October 2016 Processing pump data – a classic case of amplitude modulation Quantifying Signals – Peak, Peak-to-Peak, & RMS metrics Real World Noise & Vibration Measurement – An Interview Reference frequency for third octave filters Relative signal levels of a sinusoid with and without background noise Removing A-Weighting From Time History Signals Removing Phase Delay Using A Phaseless Filter RMS From Time History And FFT Spectrum Rotational Analysis with no Tachometer Data Sampling and Filtering Data for ISO8041 Compliance and Human Body Vibration Data Weighting Seismic Qualification Testing (Part 1) Shaft Displacement Measurement Using A PROTOR System Sound Steering Spectrum Smoothing : Why and How? Speech Articulation Index – What Does It Mean? Standard Octave Bands “The History and Future of Fourier Analysis” Workshop at SAE 2015, Grand Rapids Testing Times : Why & How We Measure Noise & Vibration The Causes of Road Noise The Effect of the Nyquist Theory on Rotational Order Analysis The Intelligent Way To Sort, Extract & Analyze Signals There are tachometer signals available on the vehicle CAN-bus. Can I use these signals instead of connecting my own tachometer signal? Three Methods For Analyzing Vibration In Rotating Components Time Varying Overall Level Vibration (or Noise) Torsional Vibration, Tacho Pulses And Aliasing Understanding & Measuring Noise Understanding Filter Characteristics Understanding Phase Measurements Understanding The Cross Correlation Function Understanding the Importance of Transducer Orientation Understanding Windowing And Overlapping Analysis Using Source Contribution Analysis to analyze complex structural dynamics issues Vibration : Measure Acceleration, Velocity or Displacement? Vibration Monitoring Phase Measurement And The Tacho Signal Video: Noise & Vibration From Rotating Machines Viewing Operational Deflection Shapes (ODS) from a Gas Turbine Generator [Video] How To Analyze Noise & Vibration From Rotating Machines Waterfall Analysis: Frequency Resolution and Smearing Waterfall Analysis: Frequency Spectrum or Order Spectrum? What Are AC and DC Coupling? What Are dB, Noise Floor & Dynamic Range? What Are Vibration, Torsional Vibration & Shaft Twist? What Can I Do About Spikes In My Data? What engineering decisions are made by measuring a power spectrum? What is “waterfall smearing”? What Is A Fourier Transform? What Is A Load Spectrum? What Is Amplitude Quantization Error? What is Auto Spectral Density? What is Operating Deflection Shape (ODS) Analysis? What Is Resonance? What is Resonance? (Part 2) What Is Resonance? (Part 3) What is Source Contribution Analysis (or SCA)? What is Synchronous (Angular) Sampling? What is the difference between Operating Deflection Shapes (ODS) and Operational Modal Analysis (OMA)? What Is The Difference Between Single Ended & Differential Inputs? What is the difference between Transfer Path Analysis (TPA) and Source Contribution Analysis (SCA)? What is the maximum analysis frequency for a waterfall in DATS? What is waterfall frequency spacing? And how does the DATS parameter ‘Requested Frequency Spacing’ work? What Sample Rate Do I Use To Measure Whole Body Vibration? Where Does The Noise In A Signal Come From? Which Should I Use? Real & imaginary? Or magnitude & phase? Why is the microphone pressure reference 2*10^-5 Pascals? Wide Band Integrators – What Are They?