What is an information medium?
Information is a message that tells us something. A medium (plural: media) is what carries the message. A letter, a poster, a phone call and a video are all media.
Every message has five parts:
- Sender: the person who has the idea.
- Message: the idea itself.
- Medium: the carrier.
- Receiver: the person who gets it.
- Noise: anything that makes the message hard to get.
Four basic kinds of media
Text uses words. It is best for exact facts, rules and long ideas. You can read it again and again.
Pictures use shapes and colours. They are best for things that are hard to say in words, such as a face, a map of a room or a chart. We understand a picture very fast.
Sound uses voice, music and effects. It is best for feeling and for people who cannot look at a screen, like a driver.
Video joins pictures and sound over time. It shows how something moves or changes, so it is good for steps and stories.
Choosing the right medium
Ask four easy questions:
- What is the message? Facts, feeling or steps?
- Who is the receiver? Age, language, can they see or hear?
- Where will they get it? Street, class, phone?
- How much time do they have?
A fire alarm uses sound and light because people must notice at once. A recipe uses text with pictures so you can follow each step.
Noise and clear design
Noise is not only loud sound. Small text, low contrast colours, a crowded poster, a poor internet link and a language the receiver does not know are all noise. To reduce noise: keep one main idea, use big simple shapes, give strong contrast, and test the message on one real person.
Try it: one message, two media
Pick a message: "The library closes at 5 pm today." Write it as a short note. Then say it aloud to a friend from across the room. Which one did your friend get right? What changed when you added distance? Now draw a clock showing 5 and a closed door. Which version is the fastest to understand? Write down what you found.
Key formulas and definitions
- Message path: Sender → Medium → Receiver
- Five parts: Sender, Message, Medium, Receiver, Noise
- Four basic media: Text, Picture, Sound, Video
- Good choice = right medium + low noise + fits the receiver
Worked examples
1. A ship must warn others in thick fog. Which medium works and why?
Sound (a horn). In fog, people cannot see far, but sound still travels. Light would be noise-blocked by fog.
2. A teacher wants to show how to fold a paper boat. Which medium is best?
Video, or pictures in steps. Folding is about movement and order, so showing is easier than telling.
3. Name the five parts of a message when you send a text to your friend about a match.
Sender: you. Message: the match news. Medium: text on a phone. Receiver: your friend. Noise: a weak signal or a typing mistake.
4. A poster has ten fonts, five colours and a lot of words. What is wrong, and how do you fix it?
It has too much noise. Keep one main idea, one or two fonts, strong contrast and a big picture.
Common mistakes
- Thinking noise only means loud sound. Messy layout and tiny text are noise too.
- Picking the medium you like instead of the one that suits the receiver.
- Saying a picture needs no words. Many pictures need a short caption.
- Forgetting the receiver. If they cannot understand it, the message did not arrive.