kaigichuu wa sumaho o muon ni shite, tsuuchion ga naranai you ni shite iru.

During meetings, I keep my phone on silent so that notification sounds do not go off.

Breakdown of kaigichuu wa sumaho o muon ni shite, tsuuchion ga naranai you ni shite iru.

• は: topic particle
• を: direct object particle
• が: subject particle
• スマホ: smartphone

Questions & Answers about kaigichuu wa sumaho o muon ni shite, tsuuchion ga naranai you ni shite iru.

What does 会議中 mean, and why is 中 attached directly to 会議?

中 here means during / in the middle of. So 会議中 means during a meeting or while in a meeting.

This 中 is a very common suffix in Japanese:

• 授業中 = during class
• 仕事中 = while working
• 食事中 = during a meal

So 会議中 is a set-style expression, not literally something like inside the meeting in a physical sense.

Why is it 会議中は instead of 会議中に?

は marks the topic. Here, 会議中は gives the sense of:

• As for when I’m in a meeting...
• During meetings, ...

It sounds like a general habit or policy.

By contrast, 会議中に would focus more on the time when something happens:

• 会議中に電話が鳴った。 = The phone rang during the meeting.

So in this sentence, は is natural because the speaker is talking about what they generally do in that situation.

How does スマホを無音にして work grammatically?