3M DL, SE Storing background noise/capture curve, STI-PA modulation envelope screen, Scale

106

Speech Intelligibility

STI-PA results screens

STI-PA modulation envelope screen

This screen reports a summary of the STI-PA modulation screen.

1.To view each band’s results, press Arrow key.

NOTE: The results can be used to assess each frequency’s band modulation level to determine why it passed or failed (in order to correct any issues).

Scale Results of selected band

Scale

Selected band

MTF scale rating results across bands

Figure 6-23: STI-PA Modulation envelope screen

Storing background noise/capture curve

In order to measure and store background noise prior to STI-PA testing, you will want to measure (or “capture”) the level via the Captured Curve Setup and then apply it during the STI-PA test. (Note: this is only performed if you do not want to play the test tone during “normal” business hours.)

1.From the Start screen, select either 1/1 octave or 1/3 octave for the measurement type.

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

Figure 6-24: Selecting 1/1 or 1/3 for measurement type

Models SE and DL