The two-senses principle is an accessibility principle that states that information on websites should be designed to be perceivable by users with different abilities. Es means that information is presented in two different ways to ensure accessibility for people with different sensory abilities.
The two-senses principle implies that websites must not only present information visually, but also make it perceptible through alternative channels. For example, important content should be presented both visually and acoustically by adding text and audio descriptions. This allows es individuals with visual or hearing impairments to understand the information on the website and receive an inclusive user experience. By applying the two-senses principle, websites can increase web accessibility and appeal to a broader user base.
Accessibility also plays an important role in search engine optimization. On the one hand, accessibility technologies provide added value for search engine bots as well. For example, alt attributes support the bots in the "readability" of image content. On the other hand, alt attributes are also used by screen readers to play out what is presented acoustically.