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Как се случва ехо?

Огледалата ще оттекат изображенията, за да върнат светлината. Стените също изпращат гласовете обратно. Ако стоите малко по-далеч от висока стена или голяма скала, ще чуете гласа си се върти назад няколко секунди по-късно.

Ако звуковата вълна срещне стена или висока и широка каменна повърхност, тя се завърта назад към източника. Така се случва ехо. Ако извлеченото звучене е кратко и звуковите вълни достигнат батерията нормално, ехо се чува ясно. Следите от звука остават в ухото за 1/10 секунди.

Тъй като скоростта на звука във въздуха е 340 метра в секунда, разстоянието между аудио източника и батерията да бъде ехо трябва да бъде най-малко 17 метра.

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