Grammar fix

quiet voice

soft speaking

Speaking in a way that is not loud, often so only people nearby can hear you.

collocationB1common

Hear it in context

Notice where the phrase sounds natural.

She spoke in a quiet voice so she wouldn’t wake the baby.daily life
In my country, teachers usually speak in a quiet voice when they want students to pay close attention.IELTS speaking

Pattern: use with 'in a quiet voice', 'speak in a quiet voice', 'say in a quiet voice'

WrongShe spoke in low voice.

RightShe spoke in a low voice.

It needs 'a' — 'in a quiet/low voice'.

Patternuse with 'in a quiet voice', 'speak in a quiet voice', 'say in a quiet voice'

Choose the version that sounds natural in speech.

Stiff She articulated her response in a subdued vocal tone.

Natural She said it in a quiet voice.

'A subdued vocal tone' is novelistic; 'in a quiet voice' is plain.

Words that usually travel with it.

in a quiet voice
in a quiet voicea soft voicelower your voicekeep your voice down

'Loud voice' is the opposite and means speaking so everyone can hear.