Which Is Louder
Two clips with identical peak levels, and one is obviously louder. Your answers reveal which of three measures you are actually following, and it is not the one on the meter.
perception
8 projects
- 63
sounddeep - 62
Same or Different
Hold a note in your head for three seconds and you can spot a twenty cent change. Put six other notes in the gap and it takes fifty. Fill it with noise instead and almost nothing happens.
sounddeep - 61
How Far Is That Wall
Clap, hear the echo, click the distance. You will be within about five per cent in a minute, and completely lost outside a band three and a half doublings wide.
sounddeep - 60
How Many Voices Can You Follow
Two voices in different places are far easier to separate than two in the same place. The help has a size in decibels, and at this pitch almost none of it comes from your head being in the way.
sounddeep - 59
The Whistle You Cannot Blow
A browser will hand you a 96 kHz audio context and let you synthesise a 35 kHz dog whistle without complaint. Three ceilings stand between that and a dog, and the code only clears one of them.
sounddeep - 58
Point at the Sound
A shooting gallery for your ears. Switch off one cue at a time and the score tells you what that cue was worth, in degrees.
sounddeep - 49
Up or Down Is Up to You
Two tones half an octave apart. Whether they went up or down is not in the signal, and you will still be sure.
sound - 37
The Wheel Goes Backwards
Two wheels on one shaft, one seen continuously and one at 24 frames a second. Half of all speeds make the second wheel spin the wrong way.