QTP4B051-16 — Noise

QTP4B051-16 governs noise calculations, noise surveys, audiometric booth surveys, and hearing protection adequacy.

Search QTP4B051-16

  • Publication number: QTP4B051-16
  • Title: Noise
  • Date: 2022-07-15

View QTP4B051-16 on armypubs.army.mil

It contains task steps, review questions, performance checklists, and answers for noise calculations, source surveys, worker dosimetry, octave band surveys, audiometric booth surveys, and hearing protection device attenuation. It requires hands-on training and evaluation for the listed tasks, with specified levels of trainer assistance.

Topics covered

  • Noise calculations
  • Noise source surveys
  • Worker exposure surveys
  • Dosimetry
  • Octave band noise surveys
  • Audiometric booth surveys
  • Hearing protection device attenuation

Questions and answers

What equipment is required for an octave band analysis of an audiometric booth?

Select a type I sound level meter (SLM) with octave band analyzer and perform pre-calibration according to the manufacturer’s instructions. (paragraph 1)

What booth conditions are required during audiometric booth testing?

Ensure booth testing conditions in relation to external noise/activity, door closed, etc., are representative of typical audiometric testing conditions. (paragraph 2)

When must the sound level meter be post-calibrated?

Perform post-calibration of SLM according to the manufacturer’s instructions. (paragraph 7)

How should a random incidence microphone be oriented to the source?

Random incidence microphones are designed for “grazing” angles; it must be hold at 70 degrees or nearly perpendicular to the source. (paragraph 2)

What noise limits apply to audiometric booth octave bands?

For 500 Hertz (Hz), < 27 dB. For 1,000 Hz, < 29 dB. For 2,000 Hz, < 34 dB. For 4,000 Hz, < 39 dB. For 8,000 Hz, < 41 dB. (paragraph 1)

Ask Reggie.Bot a question about QTP4B051-16