tick-one.wav: one low-level synthetic tick at about 0.25 seconds, then quiet until 1.5 seconds. No-device equivalent: one broad TICK mark, then an empty/QUIET slot.
tick-two.wav: low-level synthetic ticks at about 0.25 and 0.85 seconds, then quiet until 1.5 seconds. No-device equivalent: two separate broad TICK marks.
These files contain no voice, song, real recording or child media. Playback is optional; ask about access and check volume locally. A WAV file is an adult-created aid, not evidence a child heard or produced sound.