hedeuponeul kkimyeon taebeullis yeongsang soriga deo jal deullyeoyo.

-면 means if or when.

So:

• 끼다 = to put on / wear (for items like glasses, rings, headphones)
• 끼면 = if you put on / when you wear

In this sentence, 헤드폰을 끼면 means:

• If you wear headphones
• or When you put on headphones

Korean -면 often covers both ideas, and the exact nuance depends on context.

Because 헤드폰 is the object of the verb 끼다.

• 헤드폰을 끼다 = to wear/put on headphones

Here, 을 marks what you are putting on.

So:

• 헤드폰을 = headphones + object marker
• 끼면 = if you wear / if you put on

Using 이/가 here would not fit the normal grammar of 끼다.

Yes — Korean uses different verbs depending on the kind of item.

Common ones:

• 입다 = wear clothes
• 신다 = wear shoes
• 쓰다 = wear a hat / glasses sometimes in casual speech, but mainly hats
• 끼다 = wear things you put onto or between something, such as:
  • rings
  • gloves
  • glasses
  • earphones/headphones

So 헤드폰을 끼다 is natural Korean.

English uses wear for many things, but Korean is more specific.

It literally breaks down like this:

• 태블릿 = tablet
• 영상 = video
• 소리 = sound

So 태블릿 영상 소리 means something like:

• the sound of the tablet video
• the audio from the video on the tablet

Korean often places nouns together without using words like of.
So instead of saying the sound of the tablet's video, Korean just stacks the nouns:

• 태블릿 영상 소리

Because 소리 is the thing that is being heard, and with 들리다, that thing is usually marked with 이/가.

• 들리다 = to be heard / to come through audibly

So:

• 소리가 들려요 = the sound is heard / you can hear the sound

This is different from English, where we usually say I hear the sound with a direct object.

In Korean, 들리다 often treats the sound as the subject:

• 소리가 잘 들려요 = the sound is heard well / the sound comes through clearly

That is why 소리가 sounds natural here.

This is a very common learner question.

• 듣다 = to listen to / to hear intentionally
• 들리다 = to be heard / to be audible

In this sentence, the meaning is not really you actively listen better, but rather the sound becomes easier to hear.

So:

• 잘 들어요 would sound more like I listen well
• 잘 들려요 means it can be heard well / it sounds clear

That is why 들려요 is the better choice here.

더 means more.

• 잘 들려요 = it can be heard well / it sounds clear
• 더 잘 들려요 = it can be heard better / it sounds clearer

So the sentence implies a comparison:

• compared to not wearing headphones,
• the tablet video sound is heard better

Even if the comparison is not fully stated, Korean often leaves it understood.

It literally means well, but in this kind of sentence it is often best understood as:

• clearly
• easily
• properly

So:

• 소리가 잘 들려요 = the sound is easy to hear / the sound comes through clearly

This is very natural in Korean.
잘 does not always translate word-for-word as well in a stiff way.

The sentence has two main parts:

• 헤드폰을 끼면 = if/when you wear headphones
• 태블릿 영상 소리가 더 잘 들려요 = the tablet video's sound can be heard better

So the structure is:

[condition] + [result]

More literally:

• If you put on headphones, the sound of the tablet video is heard better.

More natural English:

• If you wear headphones, you can hear the sound from the tablet video better.

It is often taught as related to a passive-like idea, because it means to be heard, but it is best to learn it as its own common verb.

Compare:

• 듣다 = to listen / hear
• 들리다 = to be heard / can be heard

In real usage, 들리다 is extremely common for talking about audibility:

• 잘 안 들려요. = I can't hear well.
• 목소리가 들려요. = I can hear a voice.
• 음악이 들려요. = I hear music.

So yes, it has a passive-like feeling in English, but practically, you should just get used to 들리다 as the normal Korean verb for being audible.

들려요 is the polite, everyday speech style.

• dictionary form: 들리다
• polite present: 들려요

This style is very common in conversation and neutral polite speech. It is appropriate in most everyday situations.

If you changed the speech level:

• 들려 = casual
• 들립니다 = formal polite

So 들려요 is just the standard polite ending for normal spoken Korean.

Not exactly.

The sentence says 더 잘 들려요, which means:

• you can hear it better
• it comes through more clearly
• it is easier to hear

It does not directly say louder.

If Korean wanted to emphasize loudness, it would use words related to volume, such as:

• 더 크게 들려요 = it sounds louder
• 소리가 커요 = the sound is loud

So this sentence is more about clarity/ease of hearing than just volume.

Yes — that is a very good natural interpretation.

Even though the Korean literally uses an if/when clause, in English a smoother translation can be:

• With headphones on, the tablet video audio is easier to hear.
• If you wear headphones, you can hear the tablet video better.

Both capture the meaning well.

영상 often means:

• video
• footage
• visual media
• image/video content

In this sentence, 태블릿 영상 naturally means the video on the tablet.

But 영상 can be broader than the everyday English word video, depending on context. For example, it can also refer to recorded footage or visual content more generally.

For this sentence, though, video is the most natural translation.

A few natural translations are:

• If you wear headphones, you can hear the tablet video better.
• When you put on headphones, the sound from the tablet video is clearer.
• With headphones on, the tablet video audio is easier to hear.

The exact best translation depends on context, but all of these match the Korean well.