| Clue | Source | Date |
|---|---|---|
| Mike-check onomatopoeia | ||
| [Is this microphone working?] | LA Times Daily | 07 Mar 2023 |
| [Is this thing on?] | New York Times | 08 Jan 2023 |
| Mic-testing sound | Premier Sunday | 28 Aug 2022 |
| [Is this thing on?] | New York Times | 11 Jun 2021 |
| [Testing, testing] | New York Times | 24 Apr 2021 |
| 'I'm waiting ... ' | The Washington Post | 14 Jan 2018 |
| "I'm waiting ... " | LA Times Daily | 14 Jan 2018 |
| "I'm waiting ... " | ||
| Popular iPhone game series | Wall Street Journal | 20 Jan 2015 |
| Typing sound | ||
| Typist's sound | ||
| Sound of repeated light hitting | ||
| [Is this mike on?] | ||
| Sound at the door | ||
| Woodpecker sound effect. | ||
| Door knocks. |