UNIVERSITY OF HOUSTON – DOWNTOWN

 

ENGR 4310 - INDUSTRIAL HYGIENE INSTRUMENTATION

 

LECTURE NOTE OUTLINE – INDUSTRIAL NOISE – CHAPTER 9

 

WEEK 8

 

I.                    Compensation Aspects

 

II.                 Properties of Sound

A.                 Noise

B.                 Sound Waves

C.                 Frequency

D.                 Wavelength

E.                  Velocity

F.                  Sound Pressure

G.                 Decibels and Levels

H.                 Loudness

1.                  Equal-Loudness Contours

2.                  Sound Pressure Weighting

 

III.               Occupational Damage-Risk Criteria

A.                 Hearing Ability

B.                 AMA Guides

C.                 Risk Factors

D.                 Analysis of Noise Exposure

 

IV.              Sound Measuring Instruments

A.                 Sound Level Meters

1.                  Microphone

2.                  Amplifier

3.                  Attenuators

4.                  Weighting Networks

5.                  Metering System

6.                  Octave Band Analyzers

7.                  Noise Dosimeters

 

 

 

 


 

 

V.                 Sound Surveys

A.                 Source Measurements

B.                 Preliminary Noise Survey

C.                 Detailed Noise Survey

1.                  Area Measurements

2.                  Workstation Measurements

3.                  Exposure Duration

D.                 General Classes of Noise Exposure

1.                  Continuous Noise

2.                  Intermittent Noise

3.                  Impact-Type Noise

 

VI.              Noise-Control Programs

A.        Source

B.                 Noise Path

C.                 Enclosures

D.                 Control Measures

1.                  Engineering

2.                  Administrative Controls

3.                  PPE

E.                  Classes of Hearing Protection

1.                  Enclosures (entire head)

2.                  Aural inserts, or earplugs

3.                  Superaural protectors, or canal caps

4.                  Circumaural protectors, or earmuffs

F.         Selection of Protector

 

VII.            Industrial Audiometry

A.                 Threshold Audiometry

B.                 Examinations

C.                 Effective Programs

1.                  Medical Surveillance

2.                  Qualified Personnel

3.                  Suitable Test Environment

4.                  Calibrated Equipment

5.                  Adequate Records

 

VIII.         Noise-Exposure Regulations

A.                 OSHA Noise Standard

B.                 Hearing Conservation Programs

1.                  Monitoring

2.                  Audiometric Testing

3.                  Hearing Protectors

4.                  Training

5.                  Record Keeping

C.        NIOSH and ACGIH Noise-Exposure Guidelines