Balanced train segments for Echo

A sound which is a delayed and attenuated repetition of an earlier sound, for example because the sound wave has been reflected back from a distant, planar surface. To be perceived as an echo, the repetion must be delayed by around 100 milliseconds or more. Wikipedia

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We estimate this class has medium quality

In a random sample of videos for this class, we found 5 / 10 (50%) were accurate. Note that quality in the unbalanced training set may be significantly lower. Learn more.
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Balanced train videos for Echo (59)