Thousands of people listen to coloured sounds on platforms like YouTube and through meditation apps.
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00:00 [MUSIC]
00:10 Sound is made up of waves, much like light.
00:17 And we know a lot about light colors.
00:21 On lower wavelengths of light, we have more red frequency.
00:25 And on higher wavelengths, we have more bluish and
00:29 violet frequencies.
00:31 So in much the same way, sound can be described with colors
00:36 based on the distribution of sound.
00:38 [MUSIC]
00:48 What we're trying to do with this research is to stimulate or
00:53 boost slow wave sleep, which is one form of deep sleep.
00:59 And pink noise mirrors the types of frequencies seen in
01:03 that state of sleep.
01:04 [MUSIC]
01:13 We found that in older adults, we can enhance their slow waves.
01:17 And that they have better memory recall after sleep,
01:24 when they got the sounds, versus after sleep,
01:27 if they did not get the sounds.
01:29 [MUSIC]
01:39 [BLANK_AUDIO]