Sound Fading with Distance
Recognise that sounds get fainter as the distance from the sound source increases
What a learner can do afterwards
- State that sound gets quieter as distance from the source increases
- Describe an observation or investigation demonstrating this pattern
- Explain that vibrations spread out and get weaker as they travel further from the source
The lesson
You already know sound travels through the air as vibrations. Those vibrations don't stay the same strength forever. As they travel farther from where they started, they spread out over a bigger space, and each part carries less energy. That's why sound fades the farther away you are from it.
Mia claps her hands once. Her friend standing right beside her hears a loud, sharp clap. Another friend standing far across the playground hears the very same clap, but it sounds soft and faint. The clap didn't change. It's the same vibrations, just weaker by the time they reach the far-away friend's ears.
Next time you're outside, ask a friend to walk away from you while talking normally. Notice how their voice fades the farther they go. That's not your hearing failing, it's the sound vibrations spreading out and losing strength.
Sound doesn't disappear with distance, it just spreads out, loses strength, and gets fainter the farther away you are from it.
Watch it
Where it sits
Learn first
This opens up
Nothing builds on it yet.
Where this leads
Jobs that lean on this skill. Follow one to see everything it is built on.
8 questions wait behind this lesson, each with its answer explained. Every answer feeds the sky: stars light as they are learned, and dim when it is time to come back.