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Appendix III:C. General Noise Inspection Data
In addition to the general information collected during all health inspections, OSHA may collect the following information where it is pertinent to evaluate compliance with OSHA standards (29 CFR 1910.95, 29 CFR 1926.52, or 29 CFR 1926.101):
  • Employee Data, including:
    • Distance from the employee to the primary noise source(s)
    • Need for the employee to be present or in close proximity to the noise field
    • Employee exposure time pattern
    • Existence of any known employee auditory problems (ear infections, ringing in the ears, or trouble with hearing after the work shift)
    • Employee's opinion of the practicality of potential noise controls with respect to machine operation, where relevant
    • Hearing protection provided and any problems with its use or acceptance by employees
    • Time since the last audiometric examination and frequency of such examinations
  • Machine and Process Data, including:
    • Type of machine, and a brief description of it and the process, including identifying numbers, sketches, and photographs whenever possible
    • Condition of the machine (age and maintenance status)
    • Machine operation (speed, cycle times, parts per minute, and materials used)
    • Apparent existing noise and vibration controls
    • Source(s) and characteristics of the noise
      • Fan oise, for example, may be continuous or noncontinuous or have discrete and broad band components.
      • Octave band analyzers, real time analyzers, and narrow band analyzers may be useful in determining sources of noise.
    • Practical engineering and administrative controls and estimated costs of such controls
  • Building Data, including:
    • Size and shape of the room
    • Layout of equipment, work stations and break areas
    • Surface materials for ceiling, walls, and floors (for example, steel, cinderblock, and concrete)
    • Existing acoustical treatment
    • Potential acoustical treatment
    • Noise from other sources (spill-over noise)
    • Presence of barriers or enclosures
  • Employer Data, including:
    • What has been done to control the noise (have consultants been used, is plant noise monitored, and are controls implemented?)
    • Plans for the future
    • Administrative controls used and their enforcement
  • Hearing Loss Data, including:
    • Document the following when hearing loss is used to support a citation:
      • The amount of the threshold shift and date it was recorded.
      • Employee's exposure level.
      • Frequency and duration of employee's exposure.
      • Length of employment.
      • Explanation of any follow-up measures taken.
      • Duration of audiometric testing program.

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