How to turn the noise off my Twitter App on IPhone 7?

Just got my first IPhone ever today. I hate when my phone makes any noise whatsoever except for the alarm. Right now it only makes noise for the alarm and when I'm refreshing my Twitter feed. Notifications are completely turned off for Twitter but when I'm done with my timeline and want to refresh it makes a noise.

How do I turn this off?

Settings - Sounds.

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