MED ASSOCIATES INC.
ANL-930 SPL MEASUREMENT PKG
CHAPTER 3
| ENV-269 MICROPHONE WITH POSITIONING JIG
The ANL-930 Standalone Sound Pressure Level Measurement Package includes the ENV-269
Microphone with Positioning Jig. The ENV-269 is designed to provide consistent microphone
placement from chamber to chamber, which helps to ensure that all speakers in a system are
uniformly calibrated.
Figure 3.1 - Connect the ENV-269 Cable to the ANL-930 MIC Connector
NOTE:
Ensure ANL-930 is powered off when connecting and disconnecting the ENV-269.
Positioning Microphone in Standard Chambers
To use the ENV-269 Microphone with Positioning Jig in a standard chamber:
1.
Loosen the thumbscrews so that the positioning guides may be adjusted.
2.
Place the ENV-269 in the desired location in the chamber, with the microphone facing the
speaker, as shown in Figure 3.2.
3.
Adjust the positioning guides so that they are touching two walls of the chamber, as shown
in Figure 3.2 and tighten the thumbscrews.
4.
After calibration, place the ENV-269 in the next chamber to be calibrated, using the
positioning guides to mimic the placement used in the previous chamber.
Figure 3.2 – Top View of the ENV-269 in a Standard Chamber
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DOC-315 Rev 1.0 Copyright © 2019
Med Associates, Inc.
