| Clue | Source | Date |
|---|---|---|
| Units of noise intensity | ||
| Units measuring the intensity of sounds (8) | ||
| What are units of sound intensity (8) | ||
| Units of measurement for the intensity of sounds | The Guardian Weekend | 01 Oct 2022 |
| Units of loudness | The Times Concise | 14 Dec 2021 |
| Units of sound intensity | Irish Times Simplex | 27 Jul 2020 |
| Sound measures | ||
| Last month I heard chimes with a degree of loudness | ||
| Noise units | ||
| Sound units | ||
| Units of sound-wave intensity | ||
| Acoustic units. | ||
| Measures of sound. |