3M SE, DL user manual Criterion curve families, Types of Criterion Curves

91 Criterion curve families

Types of Criterion Curves

CAP-1

Press first softkey to assign a captured curve name (i.e., CAP- 1, CAP-2, CAP- 3, or CAP-4)

Curve indicator

Capture Press Capture softkey to Capture a curve.

Figure 6-11: Capturing a curve (CAP-1)

b. Evaluation mode: to capture a curve, the curve indicators will appear before and during your run. It will automatically save the run with curve indicators and assign the name you applied during the Options setup. To capture additional curves, assign a new name via the Options menu and then run another test. (See “Setting up Captured Curves” for details)

5.To view your results, repeatedly press Enter (See section, “Running a curve study and viewing results”, page 96.)

Criterion curve families

Criterion curves is another option to display and record a selection of spectral curves for use in room and building acoustic measurements and noise control engineering. The objective of a criterion curve is to specify the ambient noise in a room or environment with a single number or statement, rather than individually specifying multiple octave or third-octave band limits (as you do with captured curves).

Types of Criterion Curves

The SoundPro Models SE/DL support a family of criterion curve families which are explained below. (For more information, please see glossary.)

•Noise Criterion Curves (NC) – uses a tangency method and is typically used for HVAC room or building acoustic comparisons.

Models SE and DL