TOP
STORIES
 1 of 5
Electrosonic Named 2014 Integrator of the Year
Celebrating its 50th anniversary in 2014, Electrosonic's leadership has its eyes on ensuring the firm lasts at least another half-century.
 2 of 5
Crisis Averted: How 2 Firms Came Back from the Brink of Disaster
SVT and Altel Systems share their tales of tumble and turnaround to help those who may face the same problems prepare for the worst.
 3 of 5
Interactive Video Wall Promotes Recovery at Delaware Children’s Hospital
Kinesis Studio installs gesture-based activity wall for duPont Hospital for Children that gives young patients interactive landscape during recovery.
 4 of 5
Flashback Friday: Advanced AV Assists Ryan Seacrest Foundation
For this week's edition of Flashback Friday, go inside the first broadcast center of its kind inside Children's Hospital of Philadelphia. Seacrest opens the 8th studio today at Children's Hospital in Boston.
 5 of 5
Advance Technology: From Mom-and-Pop to Emerging Industry Force
Advance Technology, a $7.7M firm with limited resources, turns industry obstacles — lack of service revenue, IT convergence and talent recruitment — into competitive advantages.
Using Acoustic Skills to Test Speech Intelligibility
New NFPA fire regulations require certain areas of commercial buildings called Acoustically Distinguishable Spaces (ADS) to be tested for Speech Intelligibility for clarity of emergency voice evacuation systems.

Article


July 23, 2012 | by CI Staff

“If a tree falls in the forest and there is no one there to hear, does it make a noise?”

In a roundabout way, that same age-old question could also apply to fire-code driven emergency voice evacuation systems: “If people can’t understand what is being said, will they listen?”

The question leads to the case for measuring “Speech Intelligibility” in particular Acoustically Distinguishable Spaces (ADS) for emergency communication systems connected to fire detection/security systems.

“As the state regulations change across the country per the National Fire Protection Association (NFPA) recommendations, a great deal of confusion is starting to arise,” says Matthew Miller of Gold Line Connectors in Redding, Conn. The company is developing a series of 5- to 10-minute training videos for integrators to hone their skills in measuring Speech Intelligibility.

“While some states adhere completely to the NFPA recommendations word for word, others only adopt certain portions of their recommendations. To further complicate matters, the NFPA is always in the process of looking for ways to improve upon their recommendations. These recommendations do not only cover the civilian world, they also cover the Department of Defense as well as all government agencies. Speech Intelligibility requirements are not only a part of the United States, they are being adopted around the world in an ever growing list of countries.”

“One of the most confusing parts of the NFPA recommendations came about with the advent of ADS, or certain types of locations within a building. Some of these locations will require a passing score for intelligibility, while other areas will be exempt from testing. The reason for this came about because it was clear that certain areas simply could not achieve a passing score without causing major problems, while other areas would not typically have people congregating for long periods of time within the spaces,” notes Miller.

Gold Line’s video series, which will be posted on YouTube for integrators to watch beginning in September, will show how to test ADS areas in various types of rooms within a commercial facility, including a gymnasium, office and kitchen for public events. In general, the videos will cover how to locate the proper regulations and test procedures required to perform a Speech Intelligibility Test using a Gold Line DSP2B and a DSP30B speech Intelligibility Meter as well as a Gold Line TalkBox.

The proposed topics for the videos include: Determining ADS’s and code requirements; test procedures, a basic overview for types of Speech Intelligibility, methods for injecting STI-pa tones into an ECS Panel; setting up a TalkBox; and measurement techniques for empty and occupied rooms with or without a computer.

Social Bookmark or Share This
  • Facebook
  • Twitter
  • Digg
  • Del.icio.us
  • Yahoo! Bookmarks
  • Google Bookmarks
  • StumbleUpon
  • Technorati
  • Reddit
  • Windows Live
  • LinkedIn
  • Evernote
  • E-mail


  • Latest
  • Blogs
  • Photos
  • Resources
White Paper:
Changes in Workplace Design Equal New Revenue

Code adoption and an office cultural shift toward collaborative environments, create demand for integrated mass notification emergency communication and sound masking solutions.

White Paper: 5 Ways to Profit While Saving Clients’ Money on Utilities
White Paper: Campuses Banking on Emergency Notification, Upgrades
Webcast: Unscrambling Your AVB, HDBaseT Questions
White Paper: Technology Brief on Control Rooms
White Paper: The Voice: How to Design Emergency Communication Systems with Announcements
White Paper: Digital Signs of the Times
White Paper: A Snapshot of the Onsite Freelance & Contractor Workforce
View more papers or webcasts



Recent comments

Are you sure that Almo is the first to offer these services? SYNNEX has been offering installation services…

Posted by Josh Aldridge on 2014 11 21 · commented on
'Almo Pro A/V: Installation as a Service?'.

RPM-AVS has been providing these services to the leading integrators in the US for over twenty years. After…

Posted by Rodney Milner on 2014 11 20 · commented on
'Almo Pro A/V: Installation as a Service?'.

Do you see WHY tuition is so high in college? It has nothing to do with better education and everything to…

Posted by Follow N Money on 2014 11 18 · commented on
'University of Oregon Builds Football Performance Center for Champions'.

This article is disappointingly inaccurate.
The idea that 4K allows people at a distance to see content…

Posted by J. Johnson on 2014 11 17 · commented on
'5 Awesome Applications for 4K Video Projection'.