Product/Service

Verifier Speech Intelligibility Instrument

Source: 3M Detection Solutions

Verifier Speech Intelligibility Instrument
What good is an announcement over a mass communications system if you can't understand the message? Voice alarm systems play an important role in alerting occupants and the clarity of that message can contribute to safe evacuation procedures.

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Datasheet: Verifier Speech Intelligibility Instrument

What good is an announcement over a mass communications system if you can't understand the message? Voice alarm systems play an important role in alerting occupants and the clarity of that message can contribute to safe evacuation procedures. Many issues can affect the clarity of speech transmission through a voice actuated fire alarm or mass communications system including background noise, reverberation and distortion. The NFPA 72 Annex E (National Fire Alarm Code) has introduced standards that require voice alarm systems to meet specific levels of speech intelligibility.

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 heard and understood in an emergency.

Features

  • Easy user set-up and operation with results in Speech Transmission Index-PA (STI-PA) and Common Intelligibility Scale (CIS) formats
  • Digital readout displays numerical value and results of Bad, Poor, Fair, Good or Excellent
  • 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
  • Display table of modulation indices
  • Measures Speech Intelligibility in accordance with IEC 60268-16, NFPA 72 Annex E and DOD United Facilities Criteria UFC-4-021-01

Applications

  • Homeland Security
  • Government Facilities
  • Airport / Mass Transit Facilities
  • Arenas / Convention Centers
  • Office Buildings
  • Fire Inspections
  • Hotels
  • Schools / Gymnasiums

Click Here To Download:
Datasheet: Verifier Speech Intelligibility Instrument