kaigityuu ha sumaho wo muon ni site, tuution ga naranai you ni site iru.

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.

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.

This is:

• スマホ = smartphone
• を = object marker
• 無音にする = to make silent / mute

So 無音にして is the て-form of 無音にする.

Pattern:

• A を B にする = make A into B

Examples:

• 部屋をきれいにする = make the room clean
• 音を小さくする = lower the volume
• スマホを無音にする = put the phone on silent / mute the phone

Then the て-form links it to what comes next:

• スマホを無音にして、...

Because 無音 is treated as a noun / na-adjective-like word here, and when you say make it X, Japanese uses にする.

So:

• 無音にする = make it silent
• not 無音する

This is the same pattern as:

• 静かにする = make it quiet
• 便利にする = make it convenient
• 元気にする = cheer someone up / make someone feel better

Because 鳴る is an intransitive verb meaning to ring / sound.

So the thing that makes the sound is marked with が:

• 通知音が鳴る = the notification sound rings

That is different from 鳴らす, which is transitive:

• ベルを鳴らす = ring the bell
• 音を鳴らす = make a sound play

In this sentence, the speaker is not saying I don’t ring the notification sound. They are saying the notification sound does not ring, so 通知音が鳴らない is correct.

This is a very common pattern:

• dictionary / nai-form + ようにする
• dictionary / nai-form + ようにしている

Here:

• 鳴らない = does not ring
• ようにする = make an effort to ensure that...
• ようにしている = be making a habit/effort to ensure that...

So 通知音が鳴らないようにしている means something like:

• I make sure the notification sound doesn’t ring
• I try to keep notification sounds from going off
• I have a habit of making sure notifications stay silent

It often implies an ongoing practice, not just a one-time action.

They come from two different structures:

1. 無音にして

   • from 無音にする
   • this is the て-form linking actions

2. ようにしている

   • this is the set grammar pattern ～ようにしている
   • meaning make it a habit to / make sure to

So even though both contain して, they are doing different jobs.

You can think of the sentence like this:

• I put my phone on silent,
• and I make sure notification sounds don’t go off.

Good question. The difference is often:

• ～ようにする = to try to do / to make sure to do
• ～ようにしている = to be making a habit of doing / to regularly try to do

So:

• 鳴らないようにする can sound like a decision or intention
• 鳴らないようにしている sounds more like an established practice

In this sentence, している fits well because the speaker is describing a routine behavior during meetings.

Here it is mainly habitual.

Japanese ～ている can mean different things depending on the verb and context:

• action in progress
• resulting state
• repeated/habitual action

In this sentence, the overall meaning is not I am currently in the middle of muting my phone. It is more like:

• I keep my phone muted during meetings
• I make a point of doing this

So the natural interpretation is a habitual practice.

The subject is omitted because it is obvious from context.

In Japanese, subjects are very often left out when they are understood. Here, the implied subject is probably:

• I
• or sometimes we / one depending on context

So the sentence naturally means something like I keep my smartphone on silent during meetings... without needing 私.

Adding 私は is possible, but often unnecessary unless you want contrast or emphasis.

Not exactly.

• 無音 means no sound / silent / muted
• マナーモード usually means silent mode / manner mode on a phone

In real-life phone language, Japanese speakers very often say:

• スマホをマナーモードにする
• スマホをサイレントにする

So 無音にする is understandable and grammatical, but it can sound a little more literal: make it silent / mute it.

Yes, the sentence uses both because they describe slightly different things:

• スマホを無音にして = the concrete action the speaker takes
• 通知音が鳴らないようにしている = the purpose/result the speaker tries to ensure

So the structure is roughly:

• I put my phone on silent, and I make sure notification sounds don’t go off.

Using both makes the sentence more explicit. The first part tells you what action is taken; the second part tells you what outcome the speaker wants.

The comma simply helps separate the two linked parts of the sentence and makes it easier to read.

Japanese commas are often used more flexibly than English commas. Here it marks a natural pause between:

• スマホを無音にして
• 通知音が鳴らないようにしている

The sentence would still be understandable without the comma, but the comma improves clarity.