Sample Detection Threshold Calculations - Rutter VDR-100G3 Installation Manual

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
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):
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)
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 1 test – chirp detected on channel 3 – 903.644 (261.255)
b. Mike 1 test – chirp detected on channel 3 – 943.323 (261.255)
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)
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)
VDR-100G3/G3S Installation Manual
Chapter 8: Audio Module, Rev 1.1

Sample Detection Threshold Calculations

RMS Sub- Interval / RMS Microphone Test Value
8-35
06/10/2008