3M DL, SE user manual Audiometric background curves, Setting up audiometric background curves

94 Audiometric background curves

Setting up audiometric background curves

Audiometric background curves

The SoundPro SE/DL series supports the following two types of audiometric test room sound level curves:

•Audiometric Test Room Background Sound Level Curves (OSHA) which compares the ambient noise readings to the maximum permissible ambient noise levels (MPANLs) at 500 Hz, 1K, 4K, 8K as specified by the OSHA Hearing Conservation Amendment (1983).

•Audiometric Test Room Background Sound Level Curves (ANSI) which compares the ambient noise to selectable criterions specified in ANSI S3.1-1999 and allows for a variety of audiometric earphones using 1/1 and 1/3 octave band analysis.

Setting up audiometric background curves

For set-up parameters, it is recommended to set Meter 1 to Slow Response, Z-Weighting, and measurement to Leq before you run your study.

Additionally, the measurement type should be set to 1/1 octave for OSHA audiometric testing and should be set to 1/1 or 1/3 octave for ANSI audiometric testing. The steps below detail the procedures.

Setting up audiometric background curves and measurement parameters

1.From the start screen, select either 1/1 octave or 1/3 octave for the measurement type. (Repeatedly press first softkey.)

Selecting measurement type Press first softkey until 1/1 or 1/3 is selected

Figure 6-14: 1/1 or 1/3 octave measurement type for audiometric testing

Models SE and DL