When someone is being offensive (and/or in a state of anger) and shouts at you you respond with "lower your voice" to tell them you're not alright with their attitude and conversation manner.
Kid: Stop talking about school and grades, Mom! (shouting or speaking loudly)
Mom: Lower your voice!
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When you feel like something someone said is yelling at you, or meant towards you
โPeople need to stop over using the toilet paperโ
โLower your voice; I didnโt mean toโ
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