How to Conduct a Noise Survey Tristan K. Landers October 21, 2014
How to Conduct a Noise Survey
Aug 11, 2015
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- 1. Tristan K. Landers October 21, 2014
- 2. By the end of this Power Point, you will be able to: Understand the employers responsibility to monitor the workplace for noise levels. Be able to identify the different types of noise surveys, and the proper equipment used in each type. Be able to identify, QC, and use a Noise Dosimeter. Be able to identify, QC, and use a Sound Level Meter. Determine if a Hearing Conservation Program is required from a noise level survey.
- 3. 1910.95(c) "Hearing conservation program." 1910.95(c)(1) The employer shall administer a continuing, effective hearing conservation program, as described in paragraphs (c) through (o) of this section, whenever employee noise exposures equal or exceed an 8- hour time-weighted average sound level (TWA) of 85 decibels measured on the A scale (slow response) or, equivalently, a dose of fifty percent. For purposes of the hearing conservation program, employee noise exposures shall be computed in accordance with appendix A and Table G-16a, and without regard to any attenuation provided by the use of personal protective equipment. 1910.95(c)(2) For purposes of paragraphs (c) through (n) of this section, an 8-hour time-weighted average of 85 decibels or a dose of fifty percent shall also be referred to as the action level. 1910.95(d) "Monitoring." 1910.95(d)(1) When information indicates that any employee's exposure may equal or exceed an 8-hour time-weighted average of 85 decibels, the employer shall develop and implement a monitoring program.
- 4. Walk around Survey Site Surveys done with Sound Level Meters Individual Sampling Surveys done with Noise Dosimeters
- 5. A sound level meter (SLM) is the basic instrument for investigating noise levels. Spot-check noise dosimeter performance. Determine an employee's noise dose whenever use of a noise dosimeter is unavailable or inappropriate. Identify and evaluate individual noise sources for abatement purposes. Aid in determining the feasibility of engineering controls for individual noise sources. Evaluate hearing protectors.
- 6. Battery Check Calibrate Take Readings Record Reading Results Interpret Results
- 7. The QC-10 is a single frequency calibrator that generates a constant sound pressure level of 114 dB at a fixed frequency of 1000 Hz.
- 8. Dosimeter is actually worn by the employee in order to determine the personal noise dose during the work shift or sampling period. Dosimeters can be used to: Conduct individual noise exposure monitoring. Measure the employee's exposure to noise and automatically compute the necessary noise dose calculations. Factors to consider with the use of a dosimeter include: The microphone must be placed in the employee's hearing zone. OSHA defines the hearing zone as a sphere with a two-foot diameter surrounding the head.
- 9. Assemble the dosimeter Battery Check Calibrate Start Event Reading End Event Reading Interpret Reading Data
- 10. 1910.95(b)(1) When employees are subjected to sound exceeding those listed in Table G-16, feasible administrative or engineering controls shall be utilized. If such controls fail to reduce sound levels within the levels of Table G-16, personal protective equipment shall be provided and used to reduce sound levels within the levels of the table. 1910.95(c)(2) For purposes of paragraphs (c) through (n) of this section, an 8- hour time-weighted average of 85 decibels or a dose of fifty percent shall also be referred to as the action level.
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