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INSTRUCTIONS TO MEASURE INTELLIGIBILITY (OPT STIcis):
USING TALKBOX WITH TEST TONE OUTPUT FEATURE
WITHOUT COMPUTER
1. Choose an initial room to check the SPL dBA level of your emergency voice evacuation
system.
2. Play the system's pre-recorded emergency Tone alert and take the DSP2B/BP to the room
that you previously chose.
3. Insert the microphone into the top of the analyzer and turn on the power switch at the
bottom of the analyzer.
NOTE:
The DSP2B/BP will automatically start-up and read the SPL dBA
measurement on the
screen.
5. Check the SPL reading and measure the SPL to confirm that it meets the design
requirements
NOTE:
NFPA72-2010 requires that the Alert Tone must be +5dB above a sound that last for
more than 60 seconds or +15dB above the average SPL for an occupied period for a
public area or +10dB for a private area
6. Turn off the emergency tone.
7. Insert the STI-PA disk into the Talkbox CD player.
8. Connect the ¼ inch TEST TONE OUTPUT jack on the Talkbox to the LINE INPUT jack
on your system panel.
9. Set the VOLUME CONTROL on the Talkbox to 50% (12 noon).
10. Play the STI-PA tone through the Talkbox.
11. Go back to the same location that you made the previous SPL measurement with the
DSP2B/BP and check the SPL again.
12. Match the SPL level to your previous reading by either adjusting the Volume control on
the Talkbox or the channel input pot on your control panel.
NOTE:
Do not change the systems master volume as this is already set to code. Your test
procedure is now calibrated. The SPL level of the STI-PA tone should be 3 dB
of the Alert tone.
13. Proceed to each of the test points within the area to be tested.
14. 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.
15. 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.
WITHOUT 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. Place the analyzer microphone at ear level and verify that the SPL reading confirms that
it meets the design requirements
