Rutter VDR-100G3 - Sample Detection Threshold Calculations

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Chapter 8: Audio Module, Rev 1.1

Successfully” then it is necessary to repeat the detection threshold

calculation procedure.

18. When the detection thresholds are set correctly close the record

application; and then

19. Commit these changes to the VDR by selecting the <Commit.exe>

icon on the DMM’s desktop

NOTE: For a sample calculation of detection thresholds, see Section: 8.4.7.1: Sample

Detection Threshold Calculations;

8.4.7.1 Sample Detection Threshold Calculations

This section provides an example for calculating detection thresholds for audio input channels.

Below is an example of how to calculate detection thresholds.

NOTE: This example calculates the threshold for Channel 2 only. In order to correctly calculate

all available channel detection thresholds, the steps provided below must be completed for each

of the channels.

1. Conduct an audio test for each available microphone and record the results (it is common

for each microphone to produce more than 1 result).

a. Mike 1 test – chirp detected on channel 2 – 971.378 (300.967)

a. Mike 1 test – chirp detected on channel 2 – 1081.232 (300.967)

b. Mike 1 test – chirp detected on channel 3 – 903.644 (261.255)

b. Mike 1 test – chirp detected on channel 3 – 943.323 (261.255)

c. Mike 1 test – chirp detected on channel 4 – 990.313 (316.459)

c. Mike 1 test – chirp detected on channel 4 – 922.433 (316.459)

a. Mike 2 test – chirp detected on channel 2 – 998.937 (321.623)

a. Mike 2 test – chirp detected on channel 2 – 1067.232 (321.623)

b. Mike 2 test – chirp detected on channel 3 – 956.135 (290.967)

b. Mike 2 test – chirp detected on channel 3 – 982.204 (290.967)

c. Mike 2 test – chirp detected on channel 4 – 1010.550 (324.374)

c. Mike 2 test – chirp detected on channel 4 – 1211.322 (324.374)

To make the necessary calculations easier, organize each of the audio results in channel groups

(as below):

RMS Sub- Interval / RMS Microphone Test Value