Hi srhlchn,
Thanks for the post in Apple Support Communities. I saw your post about the sound on your iPhone, and I'm glad to help out.
Do you hear any audio from other apps, like Safari or Music? If you do, but you're not hearing alerts and similar audio, it's possible your device is in silent mode. To check, look for the Ring/Silent switch on the side of your device; if you see orange there, switch it to put your iPhone back into Ring mode: If you hear no sound or distorted sound from your iPhone, iPad, or iPod touch speaker
Also, do you have any headphones or Bluetooth audio accessories connected to your device? If so, try disconnecting them to see if this makes a difference. You can disconnect any Bluetooth accessories by tapping Settings > Bluetooth. Then, tap the "i" icon next to the device name and tap "Forget this device" and test it out: Pair a third-party Bluetooth accessory with your iPhone, iPad, or iPod touch
I hope this helps get you started.
Kind regards.