NOISE, VIBRATION AND HARSHNESS
Topical Outline • Properties of the FFT
Sound Package Materials for Vehicle Noise Control 2 Day | Classroom Seminar I.D.# 92032 The sound package materials for vehicle noise control seminar provides a detail and thorough analysis of three different classes of acoustical materials - namely absorbers, barriers, and dampers, how they are different from each other, and acoustical properties that materials should possess for optimum vehicle noise control. The seminar addresses new advances in acoustical materials, primarily in absorption materials that impact the vehicle acoustics. The seminar covers ways to evaluate the acoustical performance of these materials using different test methods, including material, component, and vehicle level measurements. The two day seminar starts with the fundamentals of NVH and sound quality related to sound package materials and discusses the importance of various noise sources that impact the development of sound package treatments in a vehicle. Learning Objectives By attending in this seminar, you will be able to: • Identify various descriptors that are used in NVH and sound quality while working with sound package materials • Recognize various noise sources and paths in a vehicle • Identify three different classes of acoustical materials • Describe ways that acoustical materials work and how they differ from each other • Road map for vehicle sound package development • Distinguish test methods used to evaluate the acoustical performance of material Who Should Attend Designed for OEM or supplier employees responsible for various noise activities, such as design, evaluation, trouble-shooting, procuring, supplying, and/or manufacturing noise control treatments and parts, this seminar will also benefit those with responsibilities including the areas of manufacturing, design, engineering, process, noise and release engineering, supervision or management. Attendees should have an undergraduate engineering degree and/or a working knowledge of noise control and automotive acoustics. Topical Outline • Fundamentals of NVH and Sound Quality −− Defining acoustical performance of acoustical parts −− Definition of terms −− Human response to sound −− Various noise and vibration instrumentation • Vehicles Noise Sources and Solutions −− The noise system Note: A similar course is available live online or on demand.
−− Sampling and digitizing −− Aliasing and filters
−− Leakage and windows −− Averaging techniques −− Autopower, crosspower and coherence −− Transmissibility and isolation −− Measuring and interpreting the transfer function • Rotating Machinery Basics −− What is an order? −− Rotation synchronous data acquisition methods −− AM and FM modulation effects −− FIR, IIR and re-sampling filters −− Up-sampling down-sampling and adaptive re-sampling • Time Frequency Methods −− Short time Fourier transform −− Gabor expansion and Gabor transform −− Orthogonality, invertability and the dual function relationship −− Gabor order tracking −− Introduction to wavelets • Fundamentals of Multi-Input-Multi-Output (MIMO) System Analysis −− Review of Single-Input-Single-Output (SISO) systems −− Introduction to Single-Input-Multiple-Output (SIMO) systems −− Partial correlation concepts −− Coherent output power −− Statistical errors in basic estimates −− Conditioned spectral analysis • Forces and Sources in MIMO Systems −− Least squares solution techniques −− Force estimation technique Conditioned Source Analysis (CSA) −− Case history: transfer path analysis −− Case history: model correlation and updating • Introduction to Data Classification and Pattern Recognition
−− Techniques for building and analyzing feature vectors −− Recognition engines: neural networks and hidden Markov models −− Applications: machine noise recognition, vision based gear mesh quality
Instructor: Fee: $1415
Michael F. Albright
1.3 CEUs
URL:
sae.org/learn/content/c0431/
165
3 ways to get a no-obligation price quote to deliver a course to your company: Call SAE Corporate Learning at +1.724.772.8529 | Fill out the online quote request at sae.org/corplearning | Email us at corplearn@sae.org
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