“Tous Chercheurs” Project: Transmitting Sound Over Long Distances

Published the 16/06/2026

Can sound be sent across great distances without getting lost in thin air? That was the exciting challenge tackled by 5 students and 3 teachers from the new “Tous Chercheurs” (“We Are All Researchers”) club launched during the 2025–2026 school year.

Step 1: The Scientific Findings

The group first established the limits of human voice and hearing. By studying how sound travels through the air, the verdict was clear: due to energy loss observed experimentally, direct sound fades extremely quickly. It is physically impossible to transmit direct sound over long distances through the air.

Step 2: A Successful Technical Solution

To bypass this hurdle, the team successfully tested and validated an ingenious approach: the electrical method (copper wire). Thanks to electromagnetic induction, the voice is converted into an electrical signal, travels through a cable, and is recreated by a loudspeaker. There are obstacles along the way—it isn’t that easy!

Curious to see what went on behind the scenes? Check out our process, results, and photos of our electrical setups directly on our detailed Google Site!

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