0:01
Morse code letter "n"
1:00
Test tone, sine wave at 440hz for 60 seconds at -12db, loop
0:02
Snow shovel slush
0:01
Electronic and digital clicks.
1:40
Hum and fan of a drinking fountain.
0:01
Saw cuts through wood hard
0:01
Morse code with a weak signal, number four
0:02
Typewriter typing
1:00
Test tone, sine wave at 500hz for 60 seconds at -12db, loop
0:01
Morse code letter "w"
1:00
Test tone, pink noise -12db loop
1:00
Test tone, sine wave at 12.5khz for 60 seconds at -12db, loop
0:01
Morse code letter "h"
0:03
Pinball bumper, magnetic bumpers ding
1:00
Test tone, square wave at 100hz for 60 seconds at -18db, loop
1:00
Test tone, sine wave at 16khz for 60 seconds at -18db, loop
0:02
Antique ski ball game, roll ball and go in hole
0:57
35MM aeroflex 435 film camera, loaded, run speed ramp variations, roll out motion picture movie
0:01
Vintage computer keyboard, type fast and hard
1:00
Test tone: square wave, 4khz, 60 seconds, -18db, loop