SONES
| Date | Clue |
|---|---|
| 2026-01-10 | Volume units |
| 2014-05-31 | Acoustic units |
| 2010-11-05 | Measures of volume |
| 2010-10-08 | Acoustics measures |
| 2010-01-02 | Acoustic measures |
| 2004-08-08 | Loudness units |
| 2003-12-07 | Sound units |
| 2003-05-06 | Loudness units |
| 2001-02-09 | Sound units |
| 2000-03-09 | Loudness units |
| 1999-12-26 | Sound units |
| 1999-06-13 | Sound units |
| 1996-06-21 | Loudness measures |
| 1995-11-04 | Loudness units |
| 1995-02-19 | Volume units |
| 1994-07-31 | Units of loudness |