While many folks shop online to find a white noise machine, which can range from $20 to more than $100, there may be no need.

Listening to natural sounds can lower stress, relieve perceived pain and foster a more positive disposition, according to ...

So instead of buying a new white noise machine, save yourself some money and just use your iPhone. 1. Tap Settings. 2. Tap Accessibility. 3. Tap Audio & Visual. 4. Tap Background Sounds.