Combining audio and visual signals Sample Clauses

Combining audio and visual signals. When feasible try to provide multiple channels for important information, such as speech and visual signs (▇▇▇▇ et al., 2004). Designers should consider engaging alternative sensory systems by providing redundant channels for those who have severe visual and hearing impairments. An example for warnings would be using sound and vibration in addition to visual signals. Screen phones that provide both auditory and visual text information help older adults interact successfully with telephone menu systems. Visual ringing signal is on the other hand essential for people who are deaf. Visual signals incorporated in the terminal are often not easily seen and are mainly of use as a reminder of line status. An interface should be provided so that external lights or a vibrating pager can be triggered by the phone (▇▇▇▇, 2004). Consider providing parallel visual and auditory presentation of language (e.g., using speech recognition or closed caption text for public addresses).