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CAOHC

Education Courses

Noise Measurement Course

Module 1 - Course Overview

Complimentary module introducing the Noise Measurement Course.

Noise-exposure assessment is a critical part of effective hearing conservation programs (HCPs). By understanding the risk of noise exposure, you can take appropriate measures to protect the hearing of people in your program.

 

Noise Measurement Course

Education Courses

Noise Course Modules

Module 1 - Course Overview

Complimentary module introducing the Noise Measurement Course.


Module 2 - Basics of Sound and Acoustics

Sound is a complex phenomenon with many different aspects. This module will help you understand the basics of how sound works so you can accurately measure noise.

Learning Objectives
On successful completion of this module, you will understand:


Module 3 - Metrics, Measures and Regulations

This module links the concepts learned in the Module 2 (Basics of Sound and Acoustics) to noise-control regulations and compliance. It addresses the terms and metrics used in regulations and briefly describes some regulatory requirements for collection and reporting of noise-exposure data.

Learning Objectives
On successful completion of this module, you will understand:


Module 4 - Instrumentation

Selecting the right tool is an important part of your noise-measurement project. This module describes the different kinds of noise-measurement equipment and helps you select the right tool for your purposes. To perform quality noise-exposure assessments and noise-control measurements, it is important to understand the instrumentation.

Instrumentation is available from many manufacturers; use of graphic depictions or examples from any manufacturer is not an endorsement of that product. The discussion in this module is geared towards equipment that meets the standards of industrial hearing conservation.

A variety of devices measure sound levels (eg, smart phone applications, noise indicators). These devices typically do not meet the performance standards required for industrial hearing conservation, environmental community noise surveys or product noise evaluations.

Learning Objectives
On successful completion of this module, you will understand:

 


Module 5 - Approaches to Noise-Exposure Surveys

Now that we understand the issues surrounding noise-measurement instrumentation, we  turn to the collection of noise-exposure data. We must address three critical questions:

This module describes different approaches to collecting noise-exposure data and helps in the selection of a methodology appropriate for the workplace.

Learning Objectives
On successful completion of this module, you will understand:


Module 6 - Data Reliability and Basic Statistical Analysis (Using Statistics)

Once you have collected the data, what conclusions can you draw from it? Can you identify people whose noise exposure crosses critical boundaries? Can you identify jobs or locations with excessive noise levels? Have you measured every possible variable that could affect noise levels?

A light dusting of statistics can help make sense of all the information you have collected.

You do not have to be a statistics expert to do noise measurements and surveys, but a basic understanding of some of the principles of statistical analysis can help you use your data.

Learning Objectives
On successful completion of this module, you will be able to:


Module 7 - Advanced Methods (Octave Band and Engineering Approaches to Noise Measurement)

When noise is measured to provide information for noise-control applications, or when the noise signal has specific characteristics, you may need to go beyond sampling to establish typical worker noise exposure.

In these situations, you may need to characterize the frequency content of the noise signal. For some signals, A-weighted, slow-response measurements may prove inadequate. This module provides background on more sophisticated noise-measurement techniques.

Learning Objectives
On successful completion of this module, you will understand:


Module 8 - Basic Noise Control

Noise control is an active or passive means of reducing sound emissions, often incentivized by personal comfort, environmental considerations or legal compliance. Practical and efficient noise control relies on an accurate identification of the source of the noise. Then you can reduce the noise at the source through engineering controls.

The goal of this module is to provide a basic understanding of noise control and options for controlling excessive noise in the workplace.

The information will provide some of the tools needed to address noise-control challenges through information on source/path/receiver approaches.

Learning Objectives
On successful completion of this module, you will understand:

 


Module 9 - Documentation and Reporting

Documentation of noise sampling is an important part of the noise-measurement process. Consider who will use the report, which information will be used often, and which information needs to be retained but is not often used. Make these decisions based on the various disciplines (eg, safety, medical, industrial hygiene, government inspectors).

Noise surveys provides information that can be analyzed and used to develop noise-control measures. In addition, it should provide complete and descriptive details so that future survey data can replicate past survey data and provide a useful trend analysis reflecting ongoing operational changes.

A key application of the information is to provide supporting data demonstrating the company’s HCP.

One of the most important applications of survey findings is the identification of noise-exposed workers for inclusion in an effective HCP. The survey findings should reflect regulatory compliance and provide useful information to help determine work-relatedness of hearing loss to define the workers compensation risk to the company.

Learning Objectives
On successful completion of this module, you will be able to:

Noise Measurement Course

Learning Objectives

On completion of this course, you will understand:

This course is not intended to make you an expert in acoustics or noise-control engineering. You will, however, know how to:

This course will not teach you how to operate your specific noise-measurement equipment. We recommend that you contact either a noise-control engineer or an industrial hygienist in your area for professional guidance if you have questions beyond the scope of this course.

Noise Measurement Course

Contributors

CAOHC thanks everyone who made this course possible through their countless hours creating text, reviewing, editing and recording all nine modules.

American Industrial Hygiene Association

American Society of Safety Engineers

Institute of Noise Control Engineering

Marquette University
(Module recording)