Internally Speaking: Applications Using the EVS-INT50W

I wrote a blog in May 2015 introducing our new EVS-INT50W internal amplifier. An overview of the product was provided along with a brief mention of applications. In this installment, I would like to discuss a few specific applications: Day Care Centers, Assembly Occupancies, K – 12 Educational Facilities, and Lodging.

evs-int50w-diagram1Day Care Centers is an ideal application for the internal amplifier because of limited wall space for mounting external hardware and the requirement for the 520Hz low frequency output. Many jurisdictions are adopting the 2012 edition of the International Building Code (IBC) which states that a manual fire alarm system that initiates the occupant notification signal utilizing an emergency voice/alarm communication system shall be installed in Group E occupancies.  Day Care facilities fall under a Group E occupancy. In addition, Section 18 of the 2013 edition of NFPA 72 states that effective January 1st, 2014, audible appliances provided for the sleeping areas to awaken occupants shall produce a low frequency alarm signal.

As defined by NFPA 101, an Assembly Occupancy is an occupancy used for a gathering of 50 or more persons for deliberation, worship, entertainment, eating, drinking, amusement, awaiting transportation, or similar uses. A common example of an assembly occupancy is a place of worship where the area of congregation will require voice evacuation. The EVS-INT50W is perfect for this application because vital wall space is saved while providing a 50 watt single speaker circuit amplifier that meets required decibel output and audibility requirements

K – 12 Educational Facilities offer the ability to use the internal amplifier with the flexibility of integrating distributed amplifiers. As with the Day Care Center application, K through 12 educational facilities fall under a Group E occupancy. Since many classrooms and other gathering locations will have an occupant load of greater than 30 people, these facilities are prime candidates for voice evacuation and emergency communications. The 5820XL-EVS and the EVS-INT50W will cover an area or areas of the facility while distributed amplifiers will cover other areas of the facility. This is quickly becoming a popular method of distributing voice.

evs-int50w-diagram2Due to recent code updates and state/local legislation, low frequency is becoming common in the lodging industry. Section 18 of the 2013 edition of NFPA 72 states that effective January 1st, 2014, audible appliances provided for the sleeping areas to awaken occupants shall produce a low frequency alarm signal. Full coverage for low frequency voice evacuation can be accomplished by using a combination of the internal amplifiers and the distributed EVS-100W amplifiers. As with the K – 12 Educational Facilities application, the 5820XL-EVS and the EVS-INT50W will cover an area or areas of the lodging facility while the distributed EVS-100W will cover other areas of the facility.

Do you have applications where the EVS-INT50W would be helpful? Please let us know by clicking on the Leave a Reply link above to enter your request.  Click here to download the EVS-INT50W data sheet.

 

About the Author
Mark Indgjer is a Product Marketing Manager with Silent Knight.  Mark joined Silent Knight in 1988 and is responsible for new product development, product marketing and much more.  Mark is also NICET Level II certified.​

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