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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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Class breakdown
DatasetNumber of videosDuration hours
Overall1,2843.6
Evaluation600.2
Balanced train590.2
Unbalanced train1,1653.2
Learn more about the dataset parts.

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.

Evaluation videos for Echo

60
videos
0.2
hours
View all 60 videos

Balanced train videos for Echo

59
videos
0.2
hours
View all 59 videos

Unbalanced train videos for Echo

1,165
videos
3.2
hours
View all 1,165 videos