Unknown Caller (track)
by U2
Year: 2009
From the album No Line On The Horizon (track #4)
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Unknown Caller appears on the following album(s) by U2:
- No Line On The Horizon (track #4) (this album) (2009)
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Unknown Caller ratings
Average Rating = (n ÷ (n + m)) × av + (m ÷ (n + m)) × AVwhere:
av = trimmed mean average rating an item has currently received.
n = number of ratings an item has currently received.
m = minimum number of ratings required for an item to appear in a 'top-rated' chart (currently 10).
AV = the site mean average rating.
Showing latest 5 ratings for this track. | Show all 87 ratings for this track.
| Rating | Date updated | Member | Track ratings | Avg. track rating |
|---|---|---|---|---|
| ! | 08/15/2026 13:39 | Siromynian | 18,594 | 71/100 |
| ! | 06/19/2026 04:22 | Exist-en-ciel | 170,190 | 71/100 |
| ! | 03/16/2026 10:55 |  Tamthebam | 45,809 | 79/100 |
| ! | 03/01/2026 19:06 | ekingshill | 414 | 81/100 |
| ! | 01/17/2026 13:33 | wizardalien | 10,030 | 60/100 |
Rating metrics:
Outliers can be removed when calculating a mean average to dampen the effects of ratings outside the normal distribution. This figure is provided as the trimmed mean. A high standard deviation can be legitimate, but can sometimes indicate 'gaming' is occurring. Consider a simplified example* of an item receiving ratings of 100, 50, & 0. The mean average rating would be 50. However, ratings of 55, 50 & 45 could also result in the same average. The second average might be more trusted because there is more consensus around a particular rating (a lower deviation).
(*In practice, some tracks can have several thousand ratings)
This track has a Bayesian average rating of 76.9/100, a mean average of 74.9/100, and a trimmed mean (excluding outliers) of 77.0/100. The standard deviation for this track is 17.3.
Unknown Caller favourites
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Unknown Caller comments
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Perfect song. The live version is so beautiful
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