Description of Silentone™ Fire & Security Alarm:

  Silentone™ Fire & Security Alarm sounders are specifically designed for use in laboratory
  animal housing and other areas. These alarms function and can be routinely tested with
  little effect to animals which have a different hearing range from that of humans.

  The Silentone™ alarm sounders are quality electronic signaling devices offering a clear
  dependable evacuation signal for perception by humans.

  Widely installed at animal facilities throughout the world, Silentone™ alarms are the
  recommended standard for fire and building authorities. The units are designed for
  use in new construction, retro-fit projects and conventional situations. The Silentone™
  is installed as an alarm for fire, smoke and unauthorized entry notification.

Features of Silentone™ Fire & Security Alarm:

• First worldwide fire & building authority approved animal facility
  alarm system
• Loud penetrating signal which alerts humans but has few
  detectable effects on animals
• Sound output of 97dB at 450mm
• CE Certified, manufacturer claims UL compliant, but not certified
• Operates at low voltages
• Tough, durable, high impact powder-coated case

  Performance

  When a Silentone™ alarm is activated it generates a sound level of 97dB (measured at
  450mm or greater peaks as measured in an anechoic chamber), at frequency between
  430 and 470Hz. This is well within the human hearing range, yet mice and rats are not
  awakened or, if already awake, show no startled response, ear twitching or other indication
  or auditory disturbance. Rabbits and guinea pigs show little more than mild disturbance at
  this intensity and no observance response if the alarm is activated in a corridor of the animal
  house. For humans, however, the noise created by a Silentone™ alarm is intensely irritating
  and disturbing.

Specifications