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3M ™ Verifier Speech Intelligibility Meters

3M(TM) The Verifier Speech Intelligibility Meter
3M(TM) The Verifier Speech Intelligibility Meter
The Verifier is a special type of sound level meter which offers simplified methodology for measurement of Speech Transmission Index-Public Address (STI-PA) to ensure voice actuated fire alarms, mass communications and PA systems are clearly understood in an emergency.
  • Easy set-up and operation with results in Speech Transmission Index-PA (STI-PA) and Common Intelligibility Scale (CIS) formats.
  • Quick 15-second measurement intervals with post-processing from meter.
  • Sample and store ambient noise during peak business hours to perform non-disruptive after-hours studies.
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3M IDMarketplace Formal NameMicrophone Class/Type
70071579497700715794973M™ Verifier Type 1 STIPA Meter, Test Tone CD and Player Verifier-1K 1 kit/csType 1
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70071579513700715795133M™ Verifier Type 2 STIPA Meter Verifier-2K, Test Tone CD and Player 1 kit/csType 2
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2 Results (Displaying results 1-2)



 Application Type‎‎ Area Monitoring (Sound Level Meter)
 Battery Life‎‎ 8 Hours
 Battery Type‎‎ Replaceable
 Category‎‎ Detection Solutions
 Category‎‎ Noise Measurement
 Data Logging‎‎ Yes
 Intrinsically Safe‎‎ No
 Intrinsic Safety‎‎ No
 Measurement Parameters‎‎ SPL,‎ STI-PA,‎ Average,‎ CIS
 Microphone Class/Type‎‎ Type 1,‎ Type 2
 Net Weight‎‎ 19 oz
 Product Type‎‎ Sound Level Meter
 Standards/Approvals‎‎ IEC 60268-16 (2003), NFPA 72 Annex E, DOD United Facilities Criteria UFC-4-021-01
 Time Response‎‎ Fast or Slow
 Weighting‎‎ F,‎ A


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