For Android users, the Google Assistant can produce white noise, shore sounds, etc.
You should probably use an app though. Noise doesn't compress well, which means that you can get strange artifacts when it is compressed from the server to you, and then from your phone to a BT device. An app playing from hardwired or internal speakers is best.
There is a good app called Chroma Doze. It lets you tune the noise to the exact spectrum needed for your situation. It also blends the noise very well so that there is no loop heard. Plenty of apps/devices think that 3-4 seconds of noise looped is enough, but one you hear it, you can't unhear the loop.
There’s a quick way to access all of this if you’d rather not dive into menus every time you want to turn on white noise. Once you’ve set your preferred sound from the options above, follow these steps:
Navigate back to the Accessibility menu.
Scroll down to the bottom and tap Accessibility Shortcut (under General).
Tap Background Sounds to select it from the list.
This will set white noise as your accessibility shortcut so your preferred background sound will play anytime you triple-click the side button, even with the screen locked. You can map this function to Back Tap, too, if you prefer.
