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13 <br /> <br />h. The male plug shall have an external check valve. <br />i. The hose shall be made of high temperature rubber capable of sustaining a <br />maximum 250 psig of pressure. <br />j. The containment system shall include a pouch and shall be made of para-aramid <br />materials and shall be capable of storing 36” of hose. <br />k. The pouch shall be attached to the SCBA by pull-the-dot fasteners. <br /> <br />M. Electronic Voice Amplifier: <br />a. The respirator shall have an optional facepiece-mounted voice amplification device <br />to electronically project the user’s voice. <br />b. The voice amplification device shall be mounted to the facepiece by means of a <br />bracket that is secured around the voice emitter of the facepiece. <br />c. The device shall contain a bayonet-style mounting fixture that enables the user to <br />insert the voice amplifier into the bracket and secure it with a quarter-turn counter- <br />clockwise when it shall lock into place. <br />d. The device shall contain a thumb latch to permit removal when it is pressed and the <br />device is rotated a quarter-turn clockwise. <br />e. The thumb latch shall contain a captive screw that enables the user to prevent <br />removal. <br />f. The device shall weigh no more than 7 ounces 225 (grams) and its size shall not <br />exceed the following dimensions: Length: 3.50 inches; (8.89 cm); width: 2.0 inches <br />(5.08 cm); depth (extension from voice emitter): 1.75 inches (4.44 cm). <br />g. The device shall be able to be upgraded to a voice amplifier, radio interface, and <br />stand-alone radio communication system that all reside in a single housing with a <br />single power source. <br />h. The device shall contain a momentary on/off switch with a tactile indication and <br />audible click when depressed. <br />i. The switch shall be covered with a sheath made of a silicone material. <br />j. The device shall contain an LED which illuminates green when the device is <br />activated and flashes once per second when a low battery condition (approximately <br />10% of battery life remaining) is present. <br />k. The device shall provide audible tones to indicate that the system has been <br />energized, de-energized and to provide a low battery indication. <br />l. The device shall be powered by three AAA alkaline batteries, which shall provide no <br />less than 50 hours of continuous operation with fully-charged batteries. <br />m. The batteries shall be contained in a gasketed compartment secured in place by <br />means of a fastener. <br />n. The door of the battery compartment shall be user-replaceable. <br />o. The device shall contain an automatic shutdown function that de- energizes the <br />voice amplifier approximately 20 minutes after the last time the user speaks. <br />p. Designed to conserve battery life when a user forgets to turn off the voice amplifier, <br />the voice amplifier shall be reactivated after shutdown by pressing the on/off switch. <br />q. The microphone shall be located on the surface of the bayonet mounting fixture and <br />voice projection shall be facilitated by means of a circular gasket that seals the <br />device to the communications mounting bracket. <br />r. The amplifier shall contain a custom speaker designed for pushing sound through <br />background noises commonly found at emergency events. <br />s. The device shall not feedback for longer than 1 second when worn on a level A haz- <br />mat suit. <br />t. The device shall be able to provide a minimum STI score of 0.65, even though <br />NFPA minimum requirement is 0.60. <br />6.1.D. - Page 15