Sound machine for a good night's sleep

We live on a fairly busy street, and in the summer our fans do a good job of drowning out traffic noise. But in the colder months, we rely on sound machines instead. I used to play white noise through my phone, but I worried about damaging the speaker at high volumes night after night. This $25 Hotmoon Cocoon 2 solves that. It has 40 sounds, including white, pink, green, and brown noise. I'm a fan of brown noise — it's less harsh and more mellow than white noise. — MF