(Contributed by Frank M.)
Technology: NOAA Weather Radio
When: SAME protocol (2000)
Inventor: Several companies produce specifically package weather radios for the Deaf and Hard of hearing. Although it was William Shaw who first invented the vibration alarm clock.
How does it Work: These weather radios are used to alert deaf and hard of hearing persons with a variety of indicators and interfaces. Three different warning lights indicate the level of alert, between statement, watch, and warning. An LCD screen is used to indicate the type of alert being received, which is located right on the radio itself. This is done by adding digital codes to each broadcast to identify different alerts and the corresponding areas to the event. Vibrating alarms are also available in case of a warning occurring during sleep hours. See Figure 1.1 below for a system operation overview.
 “NOAA Weather Radio – SHHH.” NOAA Weather Radio – SHHH. Web. 6 Dec. 2014. <http://www.nws.noaa.gov/nwr/info/shhh.html>.