15
NOTE:
In the event of an STI failure, possible reasons may include; An unfurnished room under
test will produce a significantly lower STI value since the large flat reflective surfaces will add
echoes and the lack of absorptive materials will also increase RT60 times and reduce the STI
value further.
If the “BAT” symbol is shown, replace batteries.
INSTRUCTIONS TO MEASURE INTELLIGIBILITY (OPT STIcis):
USING FIRE CONTROL PANEL WITH BUILT IN CD PLAYER
WITHOUT ADD NOISE, WITH COMPUTER
NOTE:
The first ste
p is to verify that
your systems CD player is capable of producing the
STI-PA test
tone accurat
ely.
1. Insert the GOLD LINE STI-PA test tone CD into your systems CD PLAYER.
2. Play the STI-PA CD.
3. Take the DSP2B/BP to a speaker in a room to be tested.
4. Check the SPL reading and measure the SPL to confirm that it meets the design
requirements.
5. Set the MODE SELECT switch on the bottom of the analyzer to STI.
6. Hold the microphone within a couple of inches from the speaker facing directly at the
center.
7. Press the TEST BUTTON on the analyzer and wait for the counter on the screen to count
down.
8. The screen will now read a STI score. As long as your score is at least .93 STI your
systems CD player is accurate enough for speech intelligibility testing.
9. Proceed to each of your test zones within the area to be tested one at a time.
10. Press the MODE SWITCH on the bottom of the analyzer until the lights on the face of
the unit read STI or CIS depending on your job specifications.
11. Press the TEST BUTTON on the analyzer and wait for the counter to count down. The
display will read the STI or CIS score depending on the mode that was chosen.
INSTRUCTIONS TO MEASURE INTELLIGIBILITY (OPT STIcis):
USING FIRE CONTROL PANEL WITH BUILT IN CD PLAYER
WITH ADD NOISE, WITH COMPUTER
NOTE:
The first ste
p is to verify that
your systems CD player is capable of producing the
STI-PA test
tone accurat
ely.
1. Insert the GOLD LINE STI-PA test tone CD into your systems CD PLAYER.
2. Play the STI-PA CD.
3. Take the DSP2B/BP to a speaker in a room to be tested.
4. Check the SPL reading and measure the SPL to confirm that it meets the design
requirements.
5. Set the MODE SELECT switch on the bottom of the analyzer to STI.
6. Hold the microphone within a couple of inches from the speaker facing directly at the
center.
7. Press the TEST BUTTON on the analyzer and wait for the counter on the screen to count
down.
