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Sound barriers, such as carpet and insulation, control the noise and vibration felt in the vehicle's interior.
Sound barriers, such as carpet and insulation, control the noise and vibration felt in the vehicle's interior.

Product Noise, Vibration, and Harshness (NVH) Troubleshooting

The THORS Product Noise, Vibration, and Harshness (NVH) Troubleshooting course explores understanding the source-path-receiver network for noise and vibration problems in products and vehicles. Ready to take the next step? Explore the course details and see everything we’ve packed into this program!

Learning Hours: 3

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Course Description

The THORS Product Noise, Vibration, and Harshness (NVH) Troubleshooting course explores understanding the source-path-receiver network for noise and vibration problems in products and vehicles. Common measuring devices are examined along with the frequency analysis that is performed to distinguish component sounds from one another. The course applies concepts learned and goes through a series of case studies to bring everything together in a highly engaging manner.

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Who will benefit from this NVH Troubleshooting course?

Quality, manufacturing, product engineering, designing, testing, application, purchasing, management, and sales functions at organizations that require an understanding of issues that affect the noise, vibration, and harshness or sound quality of a vehicle or product and various components

Course Classification

This manufacturing course by THORS eLearning Solutions covers identification of key terms, understanding of key concepts, and application of the covered topics.

*THORS uses the Bloom’s Taxonomy Methodology for our course development.

Certificate Awarded for Product Noise, Vibration, and Harshness (NVH) Troubleshooting

Example of certificate awarded upon successful completion of the course.

*upon successful completion

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Learning Objectives

  1. Understand the motivation for product NVH problem-solving or refinement.
  2. Describe the source-path-receiver concept.
  3. Know the difference between airborne, fluidborne, and structureborne paths and receivers.
  4. Explain the human response and sound quality and what role it has on objective and subjective measurements.
  5. Identify different sensors and devices used to measure noise and vibration.
  6. Understand the examples and illustrative case studies related to product NVH.
An example of a fluidborne path includes exhaust gas moving through an exhaust system.
Product Noise, Vibration, and Harshness (NVH) Troubleshooting Course Image

Table of Contents

  1. NVH Problem-Solving Steps
    1. Motivation for Product NVH Improvements
    2. Identification of NVH
      1. Sources
        1. Flow-Driven Sources
        2. Mechanical Sources
        3. Electromagnetic Sources
      2. Paths
        1. Airborne Paths
        2. Fluidborne Paths
        3. Structureborne Paths
      3. Receivers
    3. Diagnosis of Noise and Vibration Problems
      1. Source-Path-Receiver Network
      2. Product Constraints
      3. Frequency Identification
    4. Countermeasures
      1. Source NVH Control Solutions
      2. Path NVH Control Solutions
        1. Sound Absorption Methods
        2. Vibration Control Principles
      3. Receiver NVH Control Solutions
  2. Metrics, Measurements, and Analysis
    1. Objective Metrics
      1. Sound Pressure
        1. Decibels
          1. dBA
          2. dBC
        2. Vehicle Pass-by-Noise Test
      2. Acceleration
    2. Subjective Metrics
      1. Rating Scale
      2. Jury Pool
      3. Vibration Quality
      4. Ride Quality
    3. Measurement Devices
      1. Sound Measuring Devices
        1. Sound Level Meters
        2. Intensity Probes
        3. Acoustic Cameras
      2. Accelerometers
      3. Dynamic Pressure Sensors
    4. Frequency Analysis
      1. Time-Frequency Representation
      2. Fourier Transform
        1. Time Domain
        2. Frequency Domain
      3. Frequency Analysis Selection Parameters
    5. Benchmarking and Competitive Analysis
      1. Voice of the Customer
      2. Consumer Ratings
      3. NVH Marketing
  3. NVH Case Studies
    1. Exhaust Noise
      1. Identifying Source-Path-Receiver Network
      2. Assessing Noise
      3. Minimizing Exhaust Noise
    2. Vehicle Cabin Noise
      1. Identifying Source-Path-Receiver Network
      2. Assessing Noise
      3. Minimizing Vehicle Cabin Noise
        1. Isolators
        2. Sound Barriers
        3. Seat Perforations
    3. Electric Vehicle Noise
      1. Identifying Source-Path-Receiver Network
      2. Assessing Noise
      3. Minimizing Electric Vehicle Noise
        1. Traction Motor Noise
        2. Power Electronic Noise
        3. Tire Noise and Wind Noise
        4. Gearbox Noise

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