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Workplace Noise Exposure Monitoring

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Facility Noise Map
Facility Noise Map

For the past 28 years plus Acoustical Systems, Inc. has developed procedures to establish the occupational noise exposure as required by OSHA regulation. These procedures measure the exposure level from various types of noise, such as continuous, pure tones, and impulse noise. Reporting is in accordance with the latest OSHA and ANSI Standard S12.19-1996.

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Workplace Noise Exposure Monitoring Scope of Work

Identify Employees for Hearing Conservation Program Employees for inclusion in the hearing conservation program are identified using the Time-Weighted Average (TWA) sound level assessment. The TWA levels are established over the long term, during the full-shift of individuals or groups with similar job activities and noise exposures. We will assess the exposure potential for that individual or group, and based on the TWA assessment, we will recommend hearing protection.
Identify Target Areas for Noise Abatement Strategies The implementation of engineering or administrative noise abatement strategies for specific areas will be based on the assessment of typical noise exposure potential over the long term depending on the employees' typical job assignment. The target areas will depicted on the Facility Noise Map.
Provide Annual Reviews of Noise Exposure Our monitoring program can be conducted on an annual basis in order to determine if the long term exposure levels or the employee's noise exposure classification has changed since the last survey. An employee's noise exposure can change for many reasons including change in job, relocation of operation, addition or deletion of jobs, or employees, repair or modification of equipment, and normal or abnormal wear of equipment and length of work shift.
Noise Exposure Report and Database Provide a report which can be used by management personnel as well as those involved in various aspects of the plant hearing conservation program, such as medical, safety, industrial hygiene, engineering, and legal personnel. We will compile the data from the occupational noise exposure monitoring into a hearing conservation database. This database will not only assure compliance with OSHA record keeping requirements, but also will become a valuable part of an effective hearing conservation program.

OSHA/MSHA Mandated Hearing Conservation Programs (HCP)

HCP Overview In 1982 the Occupational Safety and Health Administration (OSHA) established mandatory regulations requiring industry, ranging from utility to equipment manufacturing plants, to develop an effective hearing conservation program (HCP) when employee noise exposures equal or exceed an 8 hour time weighted average (TWA) of 85 dBA. Since then, the Mine Safety and Health Administration (MSHA) has also developed regulation for coal, metal, and nonmetal mine noise standards as detailed by the Code of Federal Regulation for "Active Levels" and "Permissible Exposure Levels" for personnel and operators of trade equipment and machinery.
To provide total compliance with these regulations, Acoustical Systems conducts and manages total hearing conservation programs for industry.
Employee Noise Exposure Monitoring Acoustical Systems will conduct and employee noise exposure survey to establish an 8 hour time weighted average noise exposure assessment for each employee or classification of employees. Those employees with a noise exposure of 85 dBA (TWA) or greater are included in the program.
Ear Protection Assessment We will assess the current ear protection worn by the employee in order to determine if it is adequate for the employee's noise exposure and the employees' hearing thresholds. If the ear protection is determined to be inadequate, Acoustical Systems will present other options for ear protection.
Employee Training Program The OSHA required training sessions consists of a training film shown prior to the audiometric test. The film discusses the effects of noise on hearing, the purpose of hearing protection, and the proper use of hearing protectors.
Audiometric Testing with a Mobile Unit The pure tone audiometric test is conducted utilizing microprocessor audiometers, testing 1 to 10 employees at a time. The test lasts approximately 8-10 minutes. The test is then compared to the employees' baseline test and if an unconfirmed standard threshold shift has occurred, the employee is scheduled for a retest by an audiologist. For those employees missed during the first and second rounds of testing, plant personnel may conduct the tests and submit the information to Acoustical Systems for processing.
Federal Noise Regulations
  • MSHA 30 CFR 56.5050
  • MSHA 30 CFR 57.5050
  • MSHA 30 CFR 62.100
  • MSHA 30 CFR 70.500 - 70.511
  • MSHA 30 CFR 71.800 - 805
  • OSHA 29 CFR 1910.100