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Jak se objeví echo?

Zrcadla natéjí obrazy a vrátí světlo. Zdi také posílají hlasy zpět. Když stojíte kousek dál od vysoké zdi nebo od velkého útesu, uslyšíte váš hlas o několik vteřin později.

Narazí-li Zvuková vlna na zeď nebo na vysoký a široký povrch skály, otočí se zpět směrem k jejímu zdroji. Tak se to stává. Je-li extrahovaný zvuk krátký a zvukové vlny dosáhnou baterie jako normální, je ozvěna zřetelně slyšet. Stopy zvuku zůstávají v uchu po dobu 1/10 sekund.

Vzhledem k tomu, že rychlost zvuku ve vzduchu je 340 metrů za sekundu, musí být vzdálenost mezi zdrojem zvuku a baterií ozvěnou nejméně 17 metrů.

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