Stream music and podcasts FREE on Amazon Music. No credit card required.Listen free 1![](https://m.media-amazon.com/images/G/01/digital/music/player/web/EQ_accent.gif)
13 Hz Concentration Frequency
2![](https://m.media-amazon.com/images/G/01/digital/music/player/web/EQ_accent.gif)
14 Hz Focused Attention Frequency
3![](https://m.media-amazon.com/images/G/01/digital/music/player/web/EQ_accent.gif)
18 Hz Cognitive Thinking Frequency
4![](https://m.media-amazon.com/images/G/01/digital/music/player/web/EQ_accent.gif)
20 Hz Problem Solving Frequency
5![](https://m.media-amazon.com/images/G/01/digital/music/player/web/EQ_accent.gif)
30 Hz Beta Waves Frequencies
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