The use of other modalities to compensate the loss of vision has been very common for centuries. Visually-impaired people rely on their non-visual perceptual systems in everyday life, in particular on touch and hearing, to identify voices, guide themselves through spaces, and recognize shapes of objects, among others. The term 'sensory substitution' refers to the idea that we can build devices that help people to use one modality, like touch, when vision is not available. Sensory Substitution Devices like the T-Sight and the Enactive Torch can be used as Electronic Travel Aids. They may be useful for visually-impaired people and workers in low-vision conditions (for example, fire-fighters). In these situations, a Sensory Substitution Device could make the difference in navigation, obstacle avoidance, and target location.