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Why do we hear a rumbling sound when we hold a seashell to our ear?
The rumbling sound we hear when we hold a shell to our ear is not the sound of the sea; it is the sounds around us echoing inside the shell's air space.
When you hold a seashell to your ear, you hear a rumbling sound, and it feels like the sea is inside the shell. But this sound is not really the sea. The inside of the shell is hollow, and this empty space gathers the sounds around it and echoes them.
Quick facts
- The rumbling sound from a shell is not the sea; it is an echo of the sounds around you.
- The empty space inside the shell gathers up faint sounds and makes them louder.
- This is called an echo.
- An empty cup held to your ear makes a similar sound.
- Seashells are the homes of creatures called molluscs.
Check what you remember
3 questions — all of them come from the quick facts above. There is no score and no wrong turn.
1. What is the rumbling sound we hear from a shell really made of?
2. What does the empty space inside the shell do to sounds?
3. What else can we use instead of a shell to hear a similar sound?
Where this comes from
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1 tr.wikipedia.org 80/100Echo - Wikipedia
An encyclopedia page that explains simply how sound bounces back.
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3 nasa.gov 40/100NASA
An official organization's website with general science facts about sound and waves.
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