Industrial
Noise Exposure Evaluation
Course Outline
Day
1
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08:30
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Welcome and introductions |
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08:45
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Characteristics of Sound And Noise - the nature of a sound wave, mechanism of wave propagation, concepts of frequency, wavelength, amplitude, intensity, frequency distributions, octave bands, sound power, sound pressure level, decibel notation, continuous, intermittent, impulse noise, noise averaging.Demonstration of ear's frequency response and perception of intensity differences. |
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10:00
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Break |
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10:15
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Working with decibels - decibel addition, concept of exchange rate, calculation of average sound pressure levels with different exchange rates (Lav, Leq) calculation of noise summation from multiple sources. Practical exercise in logarithmic calculations using calculators and computer spreadsheets. |
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11:15
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Health effects of noise - anatomy of the ear, auditory effects of sound, hearing loss models, threshold shift, temporary and permanent threshold shift, recent research on hearing loss and hair cell damage, extra-auditory effects of noise. |
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12:00
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Lunch |
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13:00
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Sound Measurement - sound level meters, design and applications, slow and fast response, octave band filters, impact meters, personal dosimeters, measurement of fluctuating noise intensities, illustration of instrumental (logarithmic) averaging, exchange rate, calculation of Lav, Leq. Community noise monitors, frequency analyzers. Equipment demonstrations. |
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15:00
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Break |
| 15:15 | Practical Exercise 1 - Sound level meter measurements, instrument settings, octave band analysis, measurement of impulsive noise, sound pressure level mapping, |
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16:30
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Adjournment |
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Day
2
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| 08:30 | Standards and guidelines - NIOSH criterion documentation. ACGIH recommended guidelines, Current Ontario legislation governing workplace noise, legislation in other jurisdictions. Community noise standards. |
| 10:00 | Break |
| 10:15 | Conducting noise surveys - types of surveys, noise exposure assessments, source assessment surveys, community noise surveys |
| 11:15 | Practical Noise Dosimetry Exercise 1 - Choosing which workers to monitor, setting dosimeter parameters (exchange rate, criterion level, threshold), microphone placement, avoiding microphone artifacts, use of wind screen. |
| 12:00 | Lunch |
| 13:00 | Practical Dosimetry Exercise 2 - Data Retrieval and Presentation - recovering data from the dosimeter, manual collection of summary data, transferring dosimeter data to computer, use of dosimeter specific software programs, use of Windows HyperTerminal program, importation and manipulation of data with generic spreadsheet and database programs. Data presentation. |
| 15:00 | Break |
| 15:15 | Noise Measurements in Non-Industrial Settings - Evaluating room noise in non-industrial workspaces. Investigating community noise problems. |
| 16:15 | Course review and evaluation |
| 16:30 | Adjournment |
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All course participants are expected to bring a scientific calculator to the course in order to perform basic noise related calculations during the practical exercises. Participants who are able to bring a notebook computer running Microsoft Windows will be provided with demo software for performing some of the practical exercises and a spreadsheet for various noise computations. |
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ALARA
Industrial Hygiene Services Ltd. 103 Parkview Hill Crescent,
Toronto, ON Canada M4B 1R5
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Phone
(416) 759-9579
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Email info@alara.ca
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Copyright © 1998, 2010, ALARA Industrial Hygiene
Services Ltd.