In the Deaflympics, races are started using: (a) a starter's pistol (b) a whistle (c) a verbal command (d) a v

Concept understanding — Sensory Substitution

Imagine you are walking home late at night, and you cannot see a thing — the power is out, the moon is hidden. Yet you manage to find your way. You run your hand along the wall to feel for the turn. You hear the faint rustle of a tree and know you are near the gate. Your foot touches the edge of the step before you trip.

In that moment, your sense of touch and hearing are doing the job your eyes normally do. That is the seed of the idea behind sensory substitution.

What It Means, Precisely

Sensory substitution is a technique — sometimes using technology, sometimes just training — that allows information normally gathered by one sense (like vision) to be delivered through another sense (like touch or hearing). The brain, remarkably, can learn to interpret this new kind of input as if it were the original sense.

For example, a person who is blind cannot see the shape of a letter. But if a device translates that shape into a pattern of vibrations on their back, and they practise enough, they may begin to feel the letter — not just feel a buzz, but perceive the form. The information has been substituted from vision to touch.

Note

This is not the same as a simple warning signal (like a beep when a car is near). Sensory substitution aims to deliver rich, detailed information — enough to recognise objects, read text, or navigate a room — through a different sensory channel.

Why It Matters

For a commerce or humanities student, the importance of sensory substitution is not in the engineering but in what it reveals about human nature.

First, it challenges the idea that each sense is a fixed, separate channel. The brain is not a set of rigid compartments — it is a flexible interpreter. Give it the right data through the skin, and it can learn to see with the skin. This tells us that perception is not about the organ (eye, ear, skin) but about the pattern of information the brain receives.

Second, it has profound ethical and social implications. If a blind person can learn to "see" through a tactile belt or a vibrating grid on the tongue, then disability is not an absolute lack — it is a mismatch between a person and the typical way of delivering information. Sensory substitution offers a path to bridge that gap without "fixing" the person. …

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In the Deaflympics, races are started using visual signals, such as a flashing light, to ensure fair competition for athletes with hearing impairments.

The Deaflympics are an international multi-sport event, sanctioned by the International Olympic Committee, where deaf athletes compete at an elite level. A fundamental principle of the Deaflympics is to provide a fair and equitable competitive environment for all participants. This requires specific adaptations to standard sporting rules and equipment, particularly concerning signals that typically rely on sound.

In track and field events, the start of a race is a critical moment. In mainstream athletics, a starter's pistol or a verbal command is used to signal the beginning of a race. These are auditory cues. For deaf athletes, such signals are ineffective because they cannot be heard. Using auditory signals would create an unfair disadvantage, as athletes would not receive the start signal simultaneously.

To overcome this, the Deaflympics employs visual signals for race starts. A visual signal ensures that all athletes, regardless of their hearing ability, receive the start cue at the exact same moment. This maintains the integrity of the competition and provides a level playing field. A common visual signal used is a flashing light, which is clearly visible to all competitors.

Let's consider the given options: …

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Q.In the Deaflympics, races are started using:

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